48218 (+ 48354): various improvements for _gcc

1 files changed, 2052 insertions, 989 deletions

diff --git a/Completion/Unix/Command/_gcc b/Completion/Unix/Command/_gcc
index 20b3abe59..22d3083de 100644
--- a/Completion/Unix/Command/_gcc
+++ b/Completion/Unix/Command/_gcc
@@ -1,6 +1,7 @@
 #compdef gcc g++ cc c++ llvm-gcc llvm-g++ clang clang++ -value-,LDFLAGS,-default- -value-,CFLAGS,-default- -value-,CXXFLAGS,-default- -value-,CPPFLAGS,-default- -P gcc-* -P g++-* -P c++-*
 
-local curcontext="$curcontext" state line ret=1 expl args args2 march
+local curcontext="$curcontext" state line ret=1 expl i
+local -a args args2 warnings arch
 typeset -A opt_args
 
 if [[ "$service" = -value-* ]]; then
@@ -23,6 +24,7 @@ fi
 
 args=()
 case $MACHTYPE in
+
 m68*)
   args=(
     -m68000 -m68020 -m68020-40 -m68030 -m68040 -m68881
@@ -56,6 +58,16 @@ amd290?0)
 arm)
   args=(
     -mapcs -m2 -m3 -m6 -mbsd -mxopen -mno-symrename
+    '-faapcs-bitfield-load[all volatile bit-field write generates at least one load]'
+    '-faapcs-bitfield-width[volatile bit-field width is dictated by the field container type]'
+    '-mcmse[allow use of CMSE]'
+    '-mexecute-only[disallow generation of data access to code sections]'
+    '-mno-movt[disallow use of movt/movw pairs]'
+    '-mno-neg-immediates[disallow converting instructions with negative immediates to their negation]'
+    '-mnocrc[disallow use of CRC instructions]'
+    '-mrestrict-it[disallow generation of deprecated IT blocks for ARMv8]'
+    '-mtp=[thread pointer access method]:arg'
+    '-munaligned-access[allow memory accesses to be unaligned]'
   )
   ;;
 m88k)
@@ -74,8 +86,8 @@ m88k)
   )
   ;;
 rs6000|powerpc*)
+  arch=(rios1 rios2 rsc 501 603 604 power powerpc 403 common)
   args=(
-    '-mcpu=:CPU type:(rios1 rios2 rsc 501 603 604 power powerpc 403 common)'
     -mpower -mno-power -mpower2 -mno-power2
     -mpowerpc -mno-powerpc
     -mpowerpc-gpopt -mno-powerpc-gpopt
@@ -88,6 +100,32 @@ rs6000|powerpc*)
     -mtoc -mno-toc -mtraceback -mno-traceback
     -mlittle -mlittle-endian -mbig -mbig-endian
     -mcall-aix -mcall-sysv -mprototype
+    '-mcpu=:CPU type:->arch'
+    '-maltivec[altivec]'
+    '-mcmpb[cmpb]'
+    '-mcrbits[crbits]'
+    '-mcrypto[crypto]'
+    '-mdirect-move[direct move]'
+    '-mefpu2[efpu2]'
+    '-mfloat128[float128]'
+    '-mfprnd[fprnd]'
+    '-mhtm[htm]'
+    '-minvariant-function-descriptors[invariant function descriptors]'
+    '-misel[isel]'
+    '-mlongcall[longcall]'
+    '-mmfocrf[mfocrf]'
+    '-mmfcrf[mfcrf]'
+    '-mmma[mma]'
+    '-mpaired-vector-memops[paired vector memops]'
+    '-mpcrel[pcrel]'
+    '-mpopcntd[popcntd]'
+    '-mpower10-vector[power10 vector]'
+    '-mpower8-vector[power8 vector]'
+    '-mpower9-vector[power9 vector]'
+    '-mrop-protection[rop protection]'
+    '-msecure-plt[secure plt]'
+    '-mspe[spe]'
+    '-mvsx[vsx]'
   )
   ;;
 romp)
@@ -98,179 +136,233 @@ romp)
   )
   ;;
 mips*)
+  arch=(r2000 r3000 r4000 r4400 r4600 r6000)
   args=(
-    '-mcpu=:CPU type:(r2000 r3000 r4000 r4400 r4600 r6000)'
-    -mabicalls -membedded-data
-    -membedded-pic -mfp32 -mfp64 -mgas -mgp32 -mgp64
-    -mgpopt -mhalf-pic -mhard-float -mint64 -mips1
-    -mips2 -mips3 -mlong64 -mlong-calls -mmemcpy
-    -mmips-as -mmips-tfile -mno-abicalls
-    -mno-embedded-data -mno-embedded-pic
-    -mno-gpopt -mno-long-calls
-    -mno-memcpy -mno-mips-tfile -mno-rnames -mno-stats
-    -mrnames -msoft-float
-    -m4650 -msingle-float -mmad
-    -mstats -EL -EB -nocpp
-    '-G:maximum size for small section objects:'
+    -membedded-pic -mgas -mgp32 -mgp64 -mhalf-pic -mhard-float -mint64 -mips1
+    -mips2 -mips3 -mlong64 -mmemcpy -mmips-as -mmips-tfile -mno-abicalls
+    -mno-embedded-data -mno-embedded-pic -mno-gpopt -mno-long-calls -mno-memcpy
+    -mno-mips-tfile -mno-rnames -mno-stats -mrnames -msoft-float -m4650 -mmad
+    -mstats -nocpp
+    '-mcpu=:CPU type:->arch'
+    '-mabicalls[enable SVR4-style position-independent code]'
+    '-mabs=[abs]:arg'
+    '-mcheck-zero-division[check zero division]'
+    '-mcompact-branches=[compact branches]:arg'
+    '-mdouble-float[double float]'
+    '-mdsp[dsp]'
+    '-mdspr2[dspr2]'
+    '-membedded-data[place constants in the .rodata section instead of the .sdata section]'
+    '-mextern-sdata[assume that externally defined data is in the small data]'
+    '-mfp32[use 32-bit floating point registers]'
+    '-mfp64[use 64-bit floating point registers]'
+    '-mginv[ginv]'
+    '-mgpopt[use GP relative accesses for symbols known to be in a small data section]'
+    '-mindirect-jump=[change indirect jump instructions to inhibit speculation]:arg'
+    '-mips16[ips16]'
+    '-mldc1-sdc1[ldc1 sdc1]'
+    '-mlocal-sdata[extend the -G behaviour to object local data]'
+    '-mmadd4[enable the generation of 4-operand madd.s, madd.d, etc]'
+    '-mmicromips[micromips]'
+    '-mmsa[enable MSA ASE]'
+    '-mmt[enable MT ASE]'
+    '-mnan=[nan]:arg'
+    '-mno-mips16[no mips16]'
+    '-msingle-float[single float]'
+    '-mvirt[virt]'
+    '-mxgot[xgot]'
   )
   ;;
 i[3456]86|x86_64)
-  march="native i386 i486 i586 pentium pentium-mmx pentiumpro i686 pentium2 pentium3 pentium3m pentium-m pentium4 pentium4m prescott nocona core2 corei7 corei7-avx core-avx-i core-avx2 atom k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp athlon-mp k8 opteron athlon64 athlon-fx k8-sse3 opteron-sse3 athlon64-sse3 amdfam10 barcelona bdver1 bdver2 bdver3 btver1 btver2 winchip-c6 winchip2 c3 c3-2 geode"
+  arch=(
+    native i386 i486 i586 pentium pentium-mmx pentiumpro i686 pentium2 pentium3
+    pentium3m pentium-m pentium4 pentium4m prescott nocona core2 corei7 corei7-avx
+    core-avx-i core-avx2 atom k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp
+    athlon-mp k8 opteron athlon64 athlon-fx k8-sse3 opteron-sse3 athlon64-sse3
+    amdfam10 barcelona bdver1 bdver2 bdver3 btver1 btver2 winchip-c6 winchip2 c3
+    c3-2 geode
+  )
   args=(
-    '-mtune=-[tune code for CPU type]:CPU type:('"$march"')'
-    #'-mtune-ctrl=-[Fine grain control of tune features]:feature-list:' #for dev use only
-    '-march=-[generate instructions for CPU type]:CPU type:('"generic $march"')'
-    -mthreads
-    '-mreg-alloc=:default register allocation order:' 
-
-    # arguments with options
-    '-mabi=-[Generate code that conforms to the given ABI]:abi:(ms sysv)'
-    '-maddress-mode=-[Use given address mode]:address mode:(short long)'
-    '-malign-data=-[Use the given data alignment]:type:(compat abi cacheline)'
-    '-malign-functions=-[Function starts are aligned to this power of 2]: **2 base for function alignment: '
-    '-malign-jumps=-[Jump targets are aligned to this power of 2]: **2 base for jump goal alignment: '
-    '-malign-loops=-[Loop code aligned to this power of 2]: **2 base for loop alignment: '
-    '-masm=-[Use given assembler dialect]:asm dialect:(att intel)'
-    '-mbranch-cost=-[Branches are this expensive (1-5, arbitrary units)]:branch cost (1-5): '
-    '-mcmodel=-[Use given x86-64 code model]:memory model:(32 small kernel medium large)'
-    '-mfpmath=-[Generate floating point mathematics using given instruction set]:FPU type:(387 sse sse,387 both)'
-    '-mfunction-return=-[Convert function return to call and return thunk]:choice:(keep thunk thunk-inline thunk-extern)'
-    '-mincoming-stack-boundary=-[Assume incoming stack aligned to this power of 2]:assumed size of boundary: '
-    '-mindirect-branch=-[Convert indirect call and jump to call and return thunks]:choice:(keep thunk thunk-inline thunk-extern)'
-    '-mlarge-data-threshold=-[Data greater than given threshold will go into .ldata section in x86-64 medium model]:threshold: '
-    '-mmem'{set,cpy}'-strategy=-[Specify memcpy expansion strategy when expected size is known]:strategy:'
-    '-mpreferred-stack-boundary=-[Attempt to keep stack aligned to this power of 2]:size of boundary: '
-    '-mrecip=-[Control generation of reciprocal estimates]::instruction:(all none div divf divd rsqrt rsqrtf rsqrtd)' #TODO comma separated and can have !
-    '-mregparm=-[Number of registers used to pass integer arguments]:number of integer argument registers: '
-    '-mstack-protector-guard=-[Use given stack-protector guard]:guard:(global tls)'
-    '-mstringop-strategy=-[Chose strategy to generate stringop using]:stringop strategy:(byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop)'
-    '-mtls-dialect=-[Use given thread-local storage dialect]:TLS dialect:(gnu gnu2)'
-    '-mveclibabi=-[Vector library ABI to use]:vector library ABI:(acml svml)'
-    
-    # arguments without options
-    '-m3dnow[Support 3DNow! built-in functions]'
-    '-m3dnowa[Support Athlon 3Dnow! built-in functions]'
-    '-m8bit-idiv[Expand 32bit/64bit integer divide into 8bit unsigned integer divide with run-time check]'
-    '-m16[Generate 16bit i386 code]'
-    '-m32[Generate 32bit i386 code]'
-    '-m64[Generate 64bit x86-64 code]'
-    '-m96bit-long-double[sizeof(long double) is 12]'
     '-m128bit-long-double[sizeof(long double) is 16]'
-    '-m80387[Use hardware fp]'
-    '-mabm[Support code generation of Advanced Bit Manipulation (ABM) instructions]'
-    '-maccumulate-outgoing-args[Reserve space for outgoing arguments in the function prologue]'
-    '-madx[Support flag-preserving add-carry instructions]'
-    '-maes[Support AES built-in functions and code generation]'
-    '-malign-double[Align some doubles on dword boundary]'
-    '-malign-stringops[Align destination of the string operations]'
-    '-mandroid[Generate code for the Android platform]'
-    '-mavx2[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX and AVX2 built-in functions and code generation]'
-    '-mavx256-split-unaligned-load[Split 32-byte AVX unaligned load]'
-    '-mavx256-split-unaligned-store[Split 32-byte AVX unaligned store]'
-    '-mavx512bw[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512BW built- in functions and code generation]'
-    '-mavx512cd[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512CD built- in functions and code generation]'
-    '-mavx512dq[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512DQ built- in functions and code generation]'
-    '-mavx512er[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512ER built- in functions and code generation]'
-    '-mavx512f[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F built-in functions and code generation]'
-    '-mavx512ifma[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512IFMA built-in functions and code generation]'
-    '-mavx512pf[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512PF built- in functions and code generation]'
-    '-mavx512vbmi[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512VBMI built-in functions and code generation]'
-    '-mavx512vl[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512VL built- in functions and code generation]'
-    '-mavx512vpopcntdq[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512F and AVX512VPOPCNTDQ built-in functions and code generation]'
-    '-mavx5124fmaps[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512F and AVX5124FMAPS built- in functions and code generation]'
-    '-mavx5124vnniw[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512F and AVX5124VNNIW built- in functions and code generation]'
-    '-mavx[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2 and AVX built-in functions and code generation]'
-    '-mbionic[Use Bionic C library]'
-    '-mbmi2[Support BMI2 built-in functions and code generation]'
-    '-mbmi[Support BMI built-in functions and code generation]'
-    '-mcld[Generate cld instruction in the function prologue]'
-    '-mclflushopt[Support CLFLUSHOPT instructions]'
-    '-mclwb[Support CLWB instruction]'
-    '-mclzero[Support CLZERO built-in functions and code generation]'
-    '-mcrc32[Support code generation of crc32 instruction]'
-    '-mcx16[Support code generation of cmpxchg16b instruction]'
-    '-mdispatch-scheduler[Do dispatch scheduling if processor is bdver1, bdver2, bdver3, bdver4 or znver1 and Haifa scheduling is selected]'
-    '-mf16c[Support F16C built-in functions and code generation]'
-    '-mfancy-math-387[Generate sin, cos, sqrt for FPU]'
-    '-mfentry[Emit profiling counter call at function entry before prologue]'
-    '-mfma4[Support FMA4 built-in functions and code generation]'
-    '-mfma[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX and FMA built-in functions and code generation]'
-    '-mforce-drap[Always use Dynamic Realigned Argument Pointer (DRAP) to realign stack]'
-    '-mfp-ret-in-387[Return values of functions in FPU registers]'
-    '-mfsgsbase[Support FSGSBASE built-in functions and code generation]'
-    '-mfxsr[Support FXSAVE and FXRSTOR instructions]'
-    '-mgeneral-regs-only[Generate code which uses only the general registers]'
-    '-mglibc[Use GNU C library]'
-    '-mhard-float[Use hardware fp]'
-    '-mhle[Support Hardware Lock Elision prefixes]'
-    '-miamcu[Generate code that conforms to Intel MCU psABI]'
-    '-mieee-fp[Use IEEE math for fp comparisons]'
-    '-mindirect-branch-register[Force indirect call and jump via register]'
-    '-minline-all-stringops[Inline all known string operations]'
-    '-minline-stringops-dynamically[Inline memset/memcpy string operations, but perform inline version only for small blocks]'
-    '-mlong-double-64[Use 64-bit long double]'
-    '-mlong-double-80[Use 80-bit long double]'
-    '-mlong-double-128[Use 128-bit long double]'
-    '-mlwp[Support LWP built-in functions and code generation]'
-    '-mlzcnt[Support LZCNT built-in function and code generation]'
-    '-mmitigate-rop[Attempt to avoid generating instruction sequences containing ret bytes]'
-    '-mmmx[Support MMX built-in functions]'
-    '-mmovbe[Support code generation of movbe instruction]'
-    '-mmpx[Support MPX code generation]'
-    '-mms-bitfields[Use native (MS) bitfield layout]'
-    '-mmusl[Use musl C library]'
-    '-mmwaitx[Support MWAITX and MONITORX built-in functions and code generation]'
-    '-mno-default[Clear all tune features]'
-    '-mno-sse4[Do not support SSE4.1 and SSE4.2 built-in functions and code generation]'
-    '-mnop-mcount[Generate mcount/__fentry__ calls as nops. To activate they need to be patched in]'
-    '-momit-leaf-frame-pointer[Omit the frame pointer in leaf functions]'
-    '-mpc32[Set 80387 floating-point precision to 32-bit]'
-    '-mpc64[Set 80387 floating-point precision to 64-bit]'
-    '-mpc80[Set 80387 floating-point precision to 80-bit]'
-    '-mpclmul[Support PCLMUL built-in functions and code generation]'
-    '-mpku[Support PKU built-in functions and code generation]'
-    '-mpopcnt[Support code generation of popcnt instruction]'
-    '-mprefer-avx128[Use 128-bit AVX instructions instead of 256-bit AVX instructions in the auto-vectorizer]'
-    '-mprefetchwt1[Support PREFETCHWT1 built-in functions and code generation]'
-    '-mprfchw[Support PREFETCHW instruction]'
-    '-mpush-args[Use push instructions to save outgoing arguments]'
-    '-mrdpid[Support RDPID built-in functions and code generation]'
-    '-mrdrnd[Support RDRND built-in functions and code generation]'
-    '-mrdseed[Support RDSEED instruction]'
-    '-mrecip[Generate reciprocals instead of divss and sqrtss]'
-    '-mrecord-mcount[Generate __mcount_loc section with all mcount or __fentry__ calls]'
-    '-mred-zone[Use red-zone in the x86-64 code]'
-    '-mrtd[Alternate calling convention]'
-    '-mrtm[Support RTM built-in functions and code generation]'
-    '-msahf[Support code generation of sahf instruction in 64bit x86-64 code]'
-    '-msgx[Support SGX built-in functions and code generation]'
-    '-msha[Support SHA1 and SHA256 built-in functions and code generation]'
-    '-mskip-rax-setup[Skip setting up RAX register when passing variable arguments]'
-    '-msoft-float[Do not use hardware fp]'
-    '-msse2[Support MMX, SSE and SSE2 built-in functions and code generation]'
-    '-msse2avx[Encode SSE instructions with VEX prefix]'
-    '-msse3[Support MMX, SSE, SSE2 and SSE3 built-in functions and code generation]'
-    '-msse4.1[Support MMX, SSE, SSE2, SSE3, SSSE3 and SSE4.1 built-in functions and code generation]'
-    '-msse4.2[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation]'
-    '-msse4[Support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation]'
-    '-msse4a[Support MMX, SSE, SSE2, SSE3 and SSE4A built-in functions and code generation]'
-    '-msse[Support MMX and SSE built-in functions and code generation]'
-    '-msseregparm[Use SSE register passing conventions for SF and DF mode]'
-    '-mssse3[Support MMX, SSE, SSE2, SSE3 and SSSE3 built-in functions and code generation]'
-    '-mstack-arg-probe[Enable stack probing]'
-    '-mstackrealign[Realign stack in prologue]'
-    '-mstv[Disable Scalar to Vector optimization pass transforming 64-bit integer computations into a vector ones]'
-    '-mtbm[Support TBM built-in functions and code generation]'
-    '-mtls-direct-seg-refs[Use direct references against %gs when accessing tls data]'
-    '-muclibc[Use uClibc C library]'
-    '-mvect8-ret-in-mem[Return 8-byte vectors in memory]'
-    '-mvzeroupper[Generate vzeroupper instruction before a transfer of control flow out of the function]'
-    '-mx32[Generate 32bit x86-64 code]'
-    '-mxop[Support XOP built-in functions and code generation]'
-    '-mxsave[Support XSAVE and XRSTOR instructions]'
-    '-mxsavec[Support XSAVEC instructions]'
-    '-mxsaveopt[Support XSAVEOPT instruction]'
-    '-mxsaves[Support XSAVES and XRSTORS instructions]'
+    '-m16[generate 16bit i386 code]'
+    '-m32[generate 32bit i386 code]'
+    '-m3dnowa[support Athlon 3Dnow! built-in functions]'
+    '-m3dnow[support 3DNow! built-in functions]'
+    '-m64[generate 64bit x86-64 code]'
+    '-m80387[use hardware fp]'
+    '-m8bit-idiv[expand 32bit/64bit integer divide into 8bit unsigned integer divide with run-time check]'
+    '-m96bit-long-double[sizeof(long double) is 12]'
+    '-mabi=-[generate code that conforms to the given ABI]:abi:(ms sysv)'
+    '-mabm[support code generation of Advanced Bit Manipulation (ABM) instructions]'
+    '-maccumulate-outgoing-args[reserve space for outgoing arguments in the function prologue]'
+    '-maddress-mode=-[use given address mode]:address mode:(short long)'
+    '-madx[support flag-preserving add-carry instructions]'
+    '-maes[support AES built-in functions and code generation]'
+    '-malign-data=-[use the given data alignment]:type:(compat abi cacheline)'
+    '-malign-double[align some doubles on dword boundary]'
+    '-malign-functions=-[function starts are aligned to this power of 2]: **2 base for function alignment: '
+    '-malign-jumps=-[jump targets are aligned to this power of 2]: **2 base for jump goal alignment: '
+    '-malign-loops=-[loop code aligned to this power of 2]: **2 base for loop alignment: '
+    '-malign-stringops[align destination of the string operations]'
+    '-mamx-bf16[amx bf16]'
+    '-mamx-int8[amx int8]'
+    '-mamx-tile[amx tile]'
+    '-mandroid[generate code for the Android platform]'
+    '-march=-[generate instructions for CPU type]:CPU type:->archgeneric'
+    '-masm=-[use given assembler dialect]:asm dialect:(att intel)'
+    '-mavx256-split-unaligned-load[split 32-byte AVX unaligned load]'
+    '-mavx256-split-unaligned-store[split 32-byte AVX unaligned store]'
+    '-mavx2[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX and AVX2 built-in functions and code generation]'
+    '-mavx5124fmaps[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512F and AVX5124FMAPS built- in functions and code generation]'
+    '-mavx5124vnniw[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512F and AVX5124VNNIW built- in functions and code generation]'
+    '-mavx512bf16[avx512bf16]'
+    '-mavx512bitalg[avx512bitalg]'
+    '-mavx512bw[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512BW built- in functions and code generation]'
+    '-mavx512cd[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512CD built- in functions and code generation]'
+    '-mavx512dq[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512DQ built- in functions and code generation]'
+    '-mavx512er[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512ER built- in functions and code generation]'
+    '-mavx512f[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F built-in functions and code generation]'
+    '-mavx512ifma[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512IFMA built-in functions and code generation]'
+    '-mavx512pf[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512PF built- in functions and code generation]'
+    '-mavx512vbmi2[avx512vbmi2]'
+    '-mavx512vbmi[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512VBMI built-in functions and code generation]'
+    '-mavx512vl[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2 and AVX512F and AVX512VL built- in functions and code generation]'
+    '-mavx512vnni[avx512vnni]'
+    '-mavx512vp2intersect[avx512vp2intersect]'
+    '-mavx512vpopcntdq[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512F and AVX512VPOPCNTDQ built-in functions and code generation]'
+    '-mavx[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2 and AVX built-in functions and code generation]'
+    '-mavxvnni[avxvnni]'
+    '-mbionic[use Bionic C library]'
+    '-mbmi2[support BMI2 built-in functions and code generation]'
+    '-mbmi[support BMI built-in functions and code generation]'
+    '-mbranch-cost=-[branches are this expensive (1-5, arbitrary units)]:branch cost (1-5): '
+    '-mcldemote[cldemote]'
+    '-mcld[generate cld instruction in the function prologue]'
+    '-mclflushopt[support CLFLUSHOPT instructions]'
+    '-mclwb[support CLWB instruction]'
+    '-mclzero[support CLZERO built-in functions and code generation]'
+    '-mcmodel=-[use given x86-64 code model]:memory model:(32 small kernel medium large)'
+    '-mcpu=-[set CPU type]:CPU type:->arch'
+    '-mcrc32[support code generation of crc32 instruction]'
+    '-mcx16[support code generation of cmpxchg16b instruction]'
+    '-mdispatch-scheduler[do dispatch scheduling if processor is bdver1, bdver2, bdver3, bdver4 or znver1 and Haifa scheduling is selected]'
+    '-menqcmd[enqcmd]'
+    '-mf16c[support F16C built-in functions and code generation]'
+    '-mfancy-math-387[generate sin, cos, sqrt for FPU]'
+    '-mfentry[emit profiling counter call at function entry before prologue]'
+    '-mfma4[support FMA4 built-in functions and code generation]'
+    '-mfma[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX and FMA built-in functions and code generation]'
+    '-mforce-drap[always use Dynamic Realigned Argument Pointer (DRAP) to realign stack]'
+    '-mfpmath=-[generate floating point mathematics using given instruction set]:FPU type:(387 sse sse,387 both)'
+    '-mfp-ret-in-387[return values of functions in FPU registers]'
+    '-mfsgsbase[support FSGSBASE built-in functions and code generation]'
+    '-mfunction-return=-[convert function return to call and return thunk]:choice:(keep thunk thunk-inline thunk-extern)'
+    '-mfxsr[support FXSAVE and FXRSTOR instructions]'
+    '-mgeneral-regs-only[generate code which uses only the general registers]'
+    '-mgfni[gfni]'
+    '-mglibc[use GNU C library]'
+    '-mhard-float[use hardware fp]'
+    '-mhle[support Hardware Lock Elision prefixes]'
+    '-mhreset[hreset]'
+    '-miamcu[generate code that conforms to Intel MCU psABI]'
+    '-mieee-fp[use IEEE math for fp comparisons]'
+    '-mincoming-stack-boundary=-[assume incoming stack aligned to this power of 2]:assumed size of boundary: '
+    '-mindirect-branch=-[convert indirect call and jump to call and return thunks]:choice:(keep thunk thunk-inline thunk-extern)'
+    '-mindirect-branch-register[force indirect call and jump via register]'
+    '-minline-all-stringops[inline all known string operations]'
+    '-minline-stringops-dynamically[inline memset/memcpy string operations, but perform inline version only for small blocks]'
+    '-minvpcid[invpcid]'
+    '-mkl[kl]'
+    '-mlarge-data-threshold=-[data greater than given threshold will go into .ldata section in x86-64 medium model]:threshold: '
+    '-mlong-double-128[use 128-bit long double]'
+    '-mlong-double-64[use 64-bit long double]'
+    '-mlong-double-80[use 80-bit long double]'
+    '-mlwp[support LWP built-in functions and code generation]'
+    '-mlzcnt[support LZCNT built-in function and code generation]'
+    {'-mmemset-strategy=-','-mmemcpy-strategy=-'}'[specify memcpy expansion strategy when expected size is known]:strategy:'
+    '-mmitigate-rop[attempt to avoid generating instruction sequences containing ret bytes]'
+    '-mmmx[support MMX built-in functions]'
+    '-mmovbe[support code generation of movbe instruction]'
+    '-mmovdir64b[movdir64b]'
+    '-mmovdiri[movdiri]'
+    '-mmpx[support MPX code generation]'
+    '-mms-bitfields[use native (MS) bitfield layout]'
+    '-mmusl[use musl C library]'
+    '-mmwaitx[support MWAITX and MONITORX built-in functions and code generation]'
+    '-mno-default[clear all tune features]'
+    '-mnop-mcount[generate mcount/__fentry__ calls as nops. To activate they need to be patched in]'
+    '-mno-sse4[do not support SSE4.1 and SSE4.2 built-in functions and code generation]'
+    '-momit-leaf-frame-pointer[omit the frame pointer in leaf functions]'
+    '-mpc32[set 80387 floating-point precision to 32-bit]'
+    '-mpc64[set 80387 floating-point precision to 64-bit]'
+    '-mpc80[set 80387 floating-point precision to 80-bit]'
+    '-mpclmul[support PCLMUL built-in functions and code generation]'
+    '-mpconfig[pconfig]'
+    '-mpku[support PKU built-in functions and code generation]'
+    '-mpopcnt[support code generation of popcnt instruction]'
+    '-mprefer-avx128[use 128-bit AVX instructions instead of 256-bit AVX instructions in the auto-vectorizer]'
+    '-mpreferred-stack-boundary=-[attempt to keep stack aligned to this power of 2]:size of boundary: '
+    '-mprefetchwt1[support PREFETCHWT1 built-in functions and code generation]'
+    '-mprfchw[support PREFETCHW instruction]'
+    '-mptwrite[ptwrite]'
+    '-mpush-args[use push instructions to save outgoing arguments]'
+    '-mrdpid[support RDPID built-in functions and code generation]'
+    '-mrdrnd[support RDRND built-in functions and code generation]'
+    '-mrdseed[support RDSEED instruction]'
+    '-mrecip=-[control generation of reciprocal estimates]::instruction:(all none div divf divd rsqrt rsqrtf rsqrtd)' # TODO comma separated and can have !
+    '-mrecip[generate reciprocals instead of divss and sqrtss]'
+    '-mrecord-mcount[generate __mcount_loc section with all mcount or __fentry__ calls]'
+    '-mred-zone[use red-zone in the x86-64 code]'
+    '-mreg-alloc=[control the default allocation order of integer registers]:default register allocation order:'
+    '-mregparm=-[number of registers used to pass integer arguments]:number of integer argument registers: '
+    '-mretpoline-external-thunk[retpoline external thunk]'
+    '-mrtd[alternate calling convention]'
+    '-mrtm[support RTM built-in functions and code generation]'
+    '-msahf[support code generation of sahf instruction in 64bit x86-64 code]'
+    '-mserialize[serialize]'
+    '-msgx[support SGX built-in functions and code generation]'
+    '-msha[support SHA1 and SHA256 built-in functions and code generation]'
+    '-mshstk[shstk]'
+    '-mskip-rax-setup[skip setting up RAX register when passing variable arguments]'
+    '-msoft-float[do not use hardware fp]'
+    '-msse2avx[encode SSE instructions with VEX prefix]'
+    '-msse2[support MMX, SSE and SSE2 built-in functions and code generation]'
+    '-msse3[support MMX, SSE, SSE2 and SSE3 built-in functions and code generation]'
+    '-msse4.1[support MMX, SSE, SSE2, SSE3, SSSE3 and SSE4.1 built-in functions and code generation]'
+    '-msse4.2[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation]'
+    '-msse4a[support MMX, SSE, SSE2, SSE3 and SSE4A built-in functions and code generation]'
+    '-msse4[support MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE4.2 built-in functions and code generation]'
+    '-msseregparm[use SSE register passing conventions for SF and DF mode]'
+    '-msse[support MMX and SSE built-in functions and code generation]'
+    '-mssse3[support MMX, SSE, SSE2, SSE3 and SSSE3 built-in functions and code generation]'
+    '-mstack-arg-probe[enable stack probing]'
+    '-mstack-protector-guard=-[use given stack-protector guard]:guard:(global tls)'
+    '-mstackrealign[realign stack in prologue]'
+    '-mstringop-strategy=-[chose strategy to generate stringop using]:stringop strategy:(byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop)'
+    '-mstv[disable Scalar to Vector optimization pass transforming 64-bit integer computations into a vector ones]'
+    '-mtbm[support TBM built-in functions and code generation]'
+    '-mthreads[support thread-safe exception handling on MinGW]'
+    '-mtls-dialect=-[use given thread-local storage dialect]:TLS dialect:(gnu gnu2)'
+    '-mtls-direct-seg-refs[use direct references against %gs when accessing tls data]'
+    '-mtsxldtrk[tsxldtrk]'
+    #'-mtune-ctrl=-[fine grain control of tune features]:feature-list:' #for dev use only
+    '-mtune=-[tune code for CPU type]:CPU type:->arch'
+    '-muclibc[use uClibc C library]'
+    '-muintr[uintr]'
+    '-mvaes[vaes]'
+    '-mveclibabi=-[vector library ABI to use]:vector library ABI:(acml svml)'
+    '-mvect8-ret-in-mem[return 8-byte vectors in memory]'
+    '-mvpclmulqdq[vpclmulqdq]'
+    '-mvzeroupper[generate vzeroupper instruction before a transfer of control flow out of the function]'
+    '-mwaitpkg[waitpkg]'
+    '-mwbnoinvd[wbnoinvd]'
+    '-mwidekl[widekl]'
+    '-mx32[generate 32bit x86-64 code]'
+    '-mx87[x87]'
+    '-mxop[support XOP built-in functions and code generation]'
+    '-mxsavec[support XSAVEC instructions]'
+    '-mxsaveopt[support XSAVEOPT instruction]'
+    '-mxsaves[support XSAVES and XRSTORS instructions]'
+    '-mxsave[support XSAVE and XRSTOR instructions]'
   )
   ;;
 hppa*)
@@ -298,6 +390,10 @@ i960)
   )
   ;;
 sparc)
+  arch=(
+    v7 cypress v8 supersparc sparclite f930 f934 hypersparc sparclite86x sparclet
+    tsc701 v9 ultrasparc ultrasparc3
+  )
   args=(
     -mapp-regs -mno-app-regs
     -mfpu -mhard-float
@@ -308,8 +404,8 @@ sparc)
     -munaligned-doubles
     -mfaster-structs -mno-faster-structs
     -mimpure-text
-    '-mcpu=:CPU type:(v7 cypress v8 supersparc sparclite f930 f934 hypersparc sparclite86x sparclet tsc701 v9 ultrasparc ultrasparc3)'
-    '-mtune=:CPU type:(cypress supersparc hypersparc f930 f934 sparclite86x tsc701 ultrasparc ultrasparc3)'
+    '-mcpu=:CPU type:->arch'
+    '-mtune=:CPU type:->arch'
     -mv8plus -mno-v8plus
     -mvis -mno-vis
     -mlittle-endian
@@ -341,863 +437,1798 @@ h8/300)
     -mrelax -mh
   )
   ;;
+aarch64)
+  args=(
+    '-mmark-bti-property[add .note.gnu.property with BTI to assembly files]'
+    '-moutline[enable function outlining (AArch64 only)]'
+    '-msve-vector-bits=[specify the size in bits of an SVE vector register]:bits'
+  )
+  ;;
+amdgpu)
+  args=(
+    '-mcumode[specify CU wavefront execution mode]'
+    '-mtgsplit[enable threadgroup split execution mode (AMDGPU only)]'
+  )
+  ;;
+hexagon)
+  args=(
+    '-mieee-rnd-near[ieee rnd near]'
+    '-mmemops[enable generation of memop instructions]'
+    '-mnvj[enable generation of new-value jumps]'
+    '-mnvs[enable generation of new-value stores]'
+    '-mpackets[enable generation of instruction packets]'
+    '-mhvx[enable Hexagon Vector eXtensions]'
+    '-mhvx-length=[set Hexagon Vector Length]:arg'
+    '-mhvx=[enable Hexagon Vector eXtensions]:arg'
+  )
+  ;;
+webassembly*)
+  args=(
+    '-matomics[atomics]'
+    '-mbulk-memory[bulk memory]'
+    '-mexception-handling[exception handling]'
+    '-mmultivalue[multivalue]'
+    '-mmutable-globals[mutable globals]'
+    '-mnontrapping-fptoint[no ntrapping fptoint]'
+    '-mreference-types[reference types]'
+    '-msign-ext[sign ext]'
+    '-msimd128[simd128]'
+    '-mtail-call[tail call]'
+    '-munimplemented-simd128[unimplemented simd128]'
+    '-mexec-model=[execution model]:arg'
+  )
+  ;;
+riscv)
+  args=(
+    '-msave-restore[enable using library calls for save and restore]'
+  )
+  ;;
 esac
 
 if [[ "$service" = clang* ]]; then
-    args+=(
-        "-flto=-[generate output files suitable for link time optimization]::style:(full thin)"
-        -emit-llvm
-        "-Qunused-arguments[don't emit warning for unused driver arguments]"
-        --analyze
-        -fshow-column -fshow-source-location -fcaret-diagnostics -fdiagnostics-fixit-info
-        -fdiagnostics-parseable-fixits -fdiagnostics-print-source-range-info
-        -fprint-source-range-info -fdiagnostics-show-option -fmessage-length
-        "-nostdinc[Do not search standard system directories or compiler builtin directories for include files]"
-        "-nostdlibinc[Do not search standard system directories for include files]"
-        "-nobuiltininc[Do not search builtin directory for include files]"
-        "--help[Display this information]"
-    )
+  args+=(
+    '-all_load[undocumented option]'
+    '-allowable_client[undocumented option]:argument'
+    '--analyzer-no-default-checks[analyzer does no default checks]'
+    '--analyzer-output[static analyzer report output format]:format:(html plist plist-multi-file plist-html sarif sarif-html text)'
+    '--analyze[run the static analyzer]'
+    '-arch[arch]:argument'
+    '-arch_errors_fatal[arch errors fatal]'
+    '-arch_only[arch only]:argument'
+    '-arcmt-migrate-emit-errors[emit ARC errors even if the migrator can fix them]'
+    '-arcmt-migrate-report-output[output path for the plist report]:file:_files'
+    '-a-[undocumented option]:argument'
+    '--autocomplete=[autocomplete]:argument'
+    '-bind_at_load[bind at load]'
+    '--bootclasspath=[bootclasspath]:arg'
+    '-bundle[bundle]'
+    '-bundle_loader[bundle loader]:argument'
+    '--CLASSPATH=[CLASSPATH]:arg'
+    '--classpath=[classpath]:arg'
+    '-cl-denorms-are-zero[allow denormals to be flushed to zero]'
+    '-cl-fast-relaxed-math[cl fast relaxed math]'
+    '-cl-finite-math-only[allow floating-point optimizations]'
+    '-cl-fp32-correctly-rounded-divide-sqrt[specify that divide and sqrt are correctly rounded]'
+    '-client_name[client name]:argument'
+    '-cl-kernel-arg-info[generate kernel argument metadata]'
+    '-cl-mad-enable[allow use of less precise MAD computations]'
+    '-cl-no-signed-zeros[allow use of no signed zeros computations]'
+    '-cl-no-stdinc[disables all standard includes]'
+    '-cl-opt-disable[disables all optimizations]'
+    '-cl-single-precision-constant[treat double float constant as single precision]'
+    '-cl-std=[openCL language standard to compile for]:arg'
+    '-cl-strict-aliasing[this option is added for compatibility with OpenCL 1.0]'
+    '-cl-uniform-work-group-size[defines that the global work-size be uniform]'
+    '-cl-unsafe-math-optimizations[allow unsafe floating-point optimizations]'
+    '-compatibility_version[compatibility version]:compatibility version'
+    '--config[specifies configuration file]:configuration file:_files'
+    '--constant-cfstrings[use constant cfstrings]'
+    '--coverage[coverage]'
+    '-coverage[coverage]'
+    '-cpp[cpp]'
+    '--cuda-compile-host-device[compile CUDA code for both host and device]'
+    '--cuda-device-only[compile CUDA code for device only]'
+    '--cuda-gpu-arch=[cUDA offloading device architecture]:arg'
+    '--cuda-host-only[compile CUDA code for host only]'
+    '*--cuda-include-ptx=[include ptx for the following gpu architecture]:argument'
+    '--cuda-noopt-device-debug[enable device-side debug info generation]'
+    '--cuda-path=[cUDA installation path]:arg'
+    '--cuda-path-ignore-env[ignore environment variables to detect CUDA installation]'
+    '-cuid=[an id for compilation unit]:argument'
+    '-current_version[current version]:current version'
+    '-cxx-isystem[add directory to the C++ SYSTEM include search path]:directory:_files -/'
+    '-dead_strip[dead strip]'
+    '-dependency-dot[file to write dot-formatted header dependencies to]:file:_files'
+    '-dependency-file[file to write dependency output to]:file:_files'
+    '--dyld-prefix=[dyld prefix]:prefix'
+    '--dylib_file[dyld file]:file:_files'
+    '-dylinker[dylinker]'
+    '-dylinker_install_name[dylinker install name]:name'
+    '-dynamic[dynamic]'
+    '-dynamiclib[dynamic lib]'
+    '-EB[big endian]'
+    '-EL[little endian]'
+    '-emit-ast[emit Clang AST files for source inputs]'
+    '-emit-interface-stubs[generate Interface Stub Files]'
+    '-emit-llvm[use the LLVM representation for assembler and object files]'
+    '-emit-merged-ifs[generate Interface Stub Files, emit merged text not binary]'
+    '--emit-static-lib[enable linker job to emit a static library]'
+    #'-enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang[trivial automatic variable initialization to zero is only here for benchmarks]'
+    '--encoding=[encoding]:arg'
+    '-exported_symbols_list[exported symbols list]:argument'
+    '--extdirs=[extdirs]:arg'
+    '--extra-warnings[enable extra warnings]'
+    '-faccess-control[access control]'
+    '*-F+[add directory to framework search path]:framework directory:_files -/'
+    '-faddrsig[emit an address-significance table]'
+    '-faggressive-function-elimination[aggressive function elimination]'
+    '-falign-commons[align commons]'
+    '-faligned-allocation[aligned allocation]'
+    '-faligned-new[enable C++17 aligned allocation functions]'
+    '-fall-intrinsics[all intrinsics]'
+    '-fallow-editor-placeholders[treat editor placeholders as valid source code]'
+    '-fallow-unsupported[allow unsupported]'
+    '-falternative-parameter-statement[enable the old style PARAMETER statement]'
+    '-faltivec[altivec]'
+    '-fansi-escape-codes[use ANSI escape codes for diagnostics]'
+    "-fapple-kext[use Apple's kernel extensions ABI]"
+    '-fapple-link-rtlib[force linking the clang builtins runtime library]'
+    '-fapple-pragma-pack[enable Apple GCC-compatible #pragma pack handling]'
+    '-fapplication-extension[restrict code to those available for App Extensions]'
+    '-fasm-blocks[asm blocks]'
+    '-fassume-sane-operator-new[assume sane operator new]'
+    '-fast[ast]'
+    '-fastcp[astcp]'
+    '-fastf[astf]'
+    '-fautolink[autolink]'
+    '-fautomatic[automatic]'
+    '-fauto-profile-accurate[auto profile accurate]'
+    '-fauto-profile=[enable sample-based profile guided optimizations]::arg'
+    '-fbackslash[change the interpretation of backslashes in string literals]'
+    '-fbacktrace[backtrace]'
+    '-fbasic-block-sections=[generate labels for each basic block]:arg'
+    '-fbinutils-version=[produced object files can use all ELF features supported by this version]:major.minor'
+    '-fblas-matmul-limit=[blas matmul limit]:arg'
+    '-fblocks[enable the blocks language feature]'
+    '-fbootclasspath=[bootclasspath]:arg'
+    '-fborland-extensions[accept non-standard constructs supported by the Borland compiler]'
+    '-fbracket-depth=[bracket depth]:arg'
+    '-fbuild-session-file=[use the last modification time of <file> as the build session timestamp]:file:_files'
+    '-fbuild-session-timestamp=[time when the current build session started]:time since Epoch in seconds'
+    '-fbuiltin-module-map[load the clang builtins module map file]'
+    '-fcaret-diagnostics[show diagnostic messages using a caret]'
+    '-fcf-protection=[instrument control-flow architecture protection]::arg (options\: return, branch, full, none)'
+    '-fcf-runtime-abi=[cf runtime abi]:arg'
+    '-fchar8_t[enable C++ builtin type char8_t]'
+    '-fcheck-array-temporaries[check array temporaries]'
+    '-fcheck=[check]:arg'
+    '-fclang-abi-compat=[attempt to match the ABI of Clang <version>]:version'
+    '-fclasspath=[classpath]:arg'
+    '-fcoarray=[coarray]:arg'
+    '-fcolor-diagnostics[enable colors in diagnostics]'
+    '-fcomment-block-commands=[treat each comma separated argument in <arg> as a documentation comment block command]:arg'
+    '-fcompile-resource=[compile resource]:arg'
+    '-fcomplete-member-pointers[require member pointer base types to be complete if they would be significant under the Microsoft ABI]'
+    '-fconstant-cfstrings[constant cfstrings]'
+    '-fconstant-string-class=[constant string class]:arg'
+    '-fconstexpr-backtrace-limit=[constexpr backtrace limit]:arg'
+    '-fconstexpr-depth=[constexpr depth]:arg'
+    '-fconstexpr-steps=[constexpr steps]:arg'
+    '-fconvergent-functions[assume functions may be convergent]'
+    '-fconvert=[convert]:arg'
+    '-fcoroutines-ts[enable support for the C++ Coroutines TS]'
+    '-fcoverage-compilation-dir=[the compilation directory to embed in the coverage mapping]:arg'
+    '-fcoverage-mapping[generate coverage mapping to enable code coverage analysis]'
+    '-fcoverage-prefix-map=[remap file source paths in coverage mapping]:arg'
+    '-fcrash-diagnostics-dir=[crash diagnostics dir]:arg'
+    '-fcray-pointer[cray pointer]'
+    '-fcreate-profile[create profile]'
+    '-fcs-profile-generate[generate instrumented code to collect context sensitive execution counts]'
+    '-fcs-profile-generate=[generate instrumented code to collect context sensitive execution counts]:directory:_files -/'
+    '-fc\+\+-static-destructors[c++ static destructors]'
+    '-fcuda-approx-transcendentals[use approximate transcendental functions]'
+    '-fcuda-flush-denormals-to-zero[flush denormal floating point values to zero in CUDA device mode]'
+    '-fcuda-rdc[cuda rdc]'
+    '-fcuda-short-ptr[use 32-bit pointers for accessing const/local/shared address spaces]'
+    '-fcxx-exceptions[enable C++ exceptions]'
+    '-fcxx-modules[cxx modules]'
+    '-fdebug-compilation-dir=[the compilation directory to embed in the debug info]:arg'
+    '-fdebug-default-version=[default DWARF version to use]:arg'
+    '-fdebug-dump-parse-tree[dump the parse tree]'
+    '-fdebug-dump-provenance[dump provenance]'
+    '-fdebug-dump-symbols[dump symbols after the semantic analysis]'
+    '-fdebug-info-for-profiling[emit extra debug info to make sample profile more accurate]'
+    '-fdebug-macro[emit macro debug information]'
+    '-fdebug-measure-parse-tree[measure the parse tree]'
+    '-fdebug-pass-arguments[debug pass arguments]'
+    '-fdebug-pass-structure[debug pass structure]'
+    '-fdebug-pre-fir-tree[dump the pre-FIR tree]'
+    '-fdebug-ranges-base-address[use DWARF base address selection entries in .debug_ranges]'
+    '-fdebug-unparse[unparse and stop]'
+    '-fdebug-unparse-with-symbols[unparse and stop]'
+    '-fdeclspec[allow __declspec as a keyword]'
+    '-fdefault-double-8[set the default double precision kind to an 8 byte wide type]'
+    '-fdefault-integer-8[set the default integer kind to an 8 byte wide type]'
+    '-fdefault-real-8[set the default real kind to an 8 byte wide type]'
+    '-fdelayed-template-parsing[parse templated function definitions at the end of the translation unit]'
+    '-fdenormal-fp-math=[denormal fp math]:arg'
+    '-fdepfile-entry=[depfile entry]:arg'
+    '-fdiagnostics-absolute-paths[print absolute paths in diagnostics]'
+    '-fdiagnostics-fixit-info[supply fixit into with diagnostic messages]'
+    '-fdiagnostics-format=[diagnostics format]:arg'
+    '-fdiagnostics-hotness-threshold=[prevent optimization remarks from being output if they do not meet threshold]:value'
+    '-fdiagnostics-parseable-fixits[print fixits in a machine parseable form]'
+    '-fdiagnostics-print-source-range-info[print source range spans in numeric form]'
+    '-fdiagnostics-show-category=[diagnostics show category]:arg'
+    '-fdiagnostics-show-hotness[enable profile hotness information in diagnostic line]'
+    '-fdiagnostics-show-note-include-stack[display include stacks for diagnostic notes]'
+    '-fdiagnostics-show-option[enable -Woption information in diagnostic line]'
+    '-fdiagnostics-show-template-tree[print a template comparison tree for differing templates]'
+    '-fdigraphs[enable alternative token representations]'
+    "-fdirect-access-external-data[don't use GOT indirection to reference external data symbols]"
+    '-fdiscard-value-names[discard value names in LLVM IR]'
+    '-fd-lines-as-code[d lines as code]'
+    '-fd-lines-as-comments[d lines as comments]'
+    '-fdollar-ok[dollar ok]'
+    '-fdouble-square-bracket-attributes[enable double square bracket attributes]'
+    '-fdump-fortran-optimized[dump fortran optimized]'
+    '-fdump-fortran-original[dump fortran original]'
+    '-fdump-parse-tree[dump parse tree]'
+    '-fdwarf-directory-asm[DWARF directory asm]'
+    '-fdwarf-exceptions[use DWARF style exceptions]'
+    '-felide-constructors[elide constructors]'
+    '-felide-type[elide types when printing diagnostics]'
+    '-fembed-bitcode=[embed LLVM bitcode (option: off, all, bitcode, marker)]:option'
+    '-fembed-bitcode[equivalent to -fembed-bitcode=all]'
+    '-fembed-bitcode-marker[equivalent to -fembed-bitcode=marker]'
+    '-femit-all-decls[emit all declarations]'
+    '-femulated-tls[use emutls functions to access thread_local variables]'
+    '-fenable-matrix[enable matrix data type and related builtin functions]'
+    '-fencoding=[encoding]:arg'
+    '-ferror-limit=[error limit]:arg'
+    '-fescaping-block-tail-calls[escaping block tail calls]'
+    '-fexperimental-isel[experimental isel]'
+    '-fexperimental-new-constant-interpreter[enable the experimental new constant interpreter]'
+    '-fexperimental-relative-c\+\+-abi-vtables[use the experimental C++ class ABI for classes with vtables]'
+    '-fexperimental-strict-floating-point[enables experimental strict floating point in LLVM]'
+    '-fextdirs=[extdirs]:arg'
+    '-fexternal-blas[external blas]'
+    '-ff2c[f2c]'
+    '-ffile-compilation-dir=[the compilation directory to embed in the debug info]:arg'
+    '-ffile-prefix-map=[remap file source paths in debug info and predefined preprocessor macros]:arg'
+    '-ffine-grained-bitfield-accesses[use separate accesses for consecutive bitfield runs with legal widths and alignments]'
+    '-ffinite-loops[assume all loops are finite]'
+    '-ffixed-form[process source files in fixed form]'
+    '-ffixed-line-length=[set column after which characters are ignored]:arg'
+    '-ffixed-point[enable fixed point types]'
+    '-fforce-dwarf-frame[always emit a debug frame section]'
+    '-fforce-emit-vtables[emits more virtual tables to improve devirtualization]'
+    '-fforce-enable-int128[enable support for int128_t type]'
+    '-ffor-scope[for scope]'
+    '-ffpe-trap=[fpe trap]:arg'
+    '-ffp-exception-behavior=[specifies the exception behavior of floating-point operations]:arg'
+    '-ffp-model=[controls the semantics of floating-point calculations]:arg'
+    '-ffree-form[process source files in free form]'
+    '-ffree-line-length-[free line length]:arg'
+    '-ffrontend-optimize[frontend optimize]'
+    '-fglobal-isel[enables the global instruction selector]'
+    '-fgnuc-version=[sets various macros to claim compatibility with the given GCC version]:version'
+    '-fgnu-inline-asm[gnu inline asm]'
+    '-fgnu-keywords[allow GNU-extension keywords regardless of language standard]'
+    '-fgnu-runtime[generate output compatible with the standard GNU Objective-C runtime]'
+    '-fgpu-allow-device-init[allow device side init function in HIP]'
+    '-fgpu-defer-diag[defer host/device related diagnostic messages for CUDA/HIP]'
+    '-fgpu-rdc[generate relocatable device code, also known as separate compilation mode]'
+    '-fgpu-sanitize[enable sanitizer for AMDGPU target]'
+    '-fheinous-gnu-extensions[heinous GNU extensions]'
+    '-fhip-new-launch-api,[-fno-hip-new-launch-api Use new kernel launching API for HIP]'
+    '-fhonor-infinites[honor infinites]'
+    '-fhonor-infinities[honor infinities]'
+    '-fhonor-nans[honor nans]'
+    '-fignore-exceptions[enable support for ignoring exception handling constructs]'
+    '-filelist[ilelist]:arg'
+    '-fimplicit-module-maps[implicit module maps]'
+    '-fimplicit-modules[implicit modules]'
+    '-fimplicit-none[no implicit typing allowed unless overridden by IMPLICIT statements]'
+    '-findirect-virtual-calls[indirect virtual calls]'
+    '-finit-character=[init character]:arg'
+    '-finit-integer=[init integer]:arg'
+    '-finit-local-zero[init local zero]'
+    '-finit-logical=[init logical]:arg'
+    '-finit-real=[init real]:arg'
+    '-finline-hint-functions[inline functions which are (explicitly or implicitly) marked inline]'
+    '-finstrument-function-entry-bare[instrument function entry only]'
+    '-finstrument-functions-after-inlining[insert the calls after inlining]'
+    '-finteger-4-integer-8[integer 4 integer 8]'
+    '-fintegrated-as[enable the integrated assembler]'
+    '-fintegrated-cc1[run cc1 in-process]'
+    '-fintrinsic-modules-path[intrinsic modules path]'
+    '-flarge-sizes[use INTEGER(KIND=8) for the result type in size-related intrinsics]'
+    '-flat_namespace[flat namespace]'
+    '-flegacy-pass-manager[use the legacy pass manager in LLVM]'
+    '-flimited-precision=[limited precision]:arg'
+    '-flogical-abbreviations[enable logical abbreviations]'
+    '-flto=-[generate output files suitable for link time optimization]::style:(full thin)'
+    '-flto-jobs=[controls the backend parallelism]:arg'
+    '-fmacro-backtrace-limit=[macro backtrace limit]:limit'
+    '-fmacro-prefix-map=[remap file source paths in predefined preprocessor macros]:arg'
+    '-fmax-array-constructor=[max array constructor]:arg'
+    '-fmax-identifier-length[max identifier length]'
+    '-fmax-stack-var-size=[max stack var size]:arg'
+    '-fmax-subrecord-length=[max subrecord length]:arg'
+    '-fmax-tokens=[max total number of preprocessed tokens for -Wmax-tokens]:number'
+    '-fmax-type-align=[specify the maximum alignment to enforce on pointers lacking an explicit alignment]:arg'
+    '-fmemory-profile=[enable heap memory profiling and dump results into <directory>]::directory:_files -/'
+    '-fmodule-file-deps[module file deps]'
+    '-fmodule-file=[specify the mapping of module name to precompiled module file]:file:_files'
+    '-fmodule-implementation-of[module implementation of]:name'
+    '-fmodule-map-file=[load this module map file]:file:_files'
+    '-fmodule-maps[implicitly search the file system for module map files.]'
+    '-fmodule-name=[specify the name of the module to build]:name'
+    '-fmodule-private[module private]'
+    '-fmodules-cache-path=[specify the module cache path]:directory:_files -/'
+    '-fmodules-decluse[require declaration of modules used within a module]'
+    '-fmodules-disable-diagnostic-validation[disable validation of the diagnostic options when loading the module]'
+    '-fmodules[enable the modules language feature]'
+    '-fmodules-ignore-macro=[ignore the definition of the given macro when building and loading modules]:macro'
+    '-fmodules-prune-after=[specify the interval after which a module file will be considered unused]:seconds'
+    '-fmodules-prune-interval=[specify the interval between attempts to prune the module cache]:seconds'
+    '-fmodules-search-all[search even non-imported modules to resolve references]'
+    '-fmodules-strict-decluse[requires all headers to be in modules]'
+    '-fmodules-ts[enable support for the C++ Modules TS]'
+    '-fmodules-user-build-path[specify the module user build path]:directory:_files -/'
+    '-fmodules-validate-input-files-content[validate PCM input files based on content if mtime differs]'
+    "-fmodules-validate-once-per-build-session[don't verify input files for the modules]"
+    '-fmodules-validate-system-headers[validate the system headers that a module depends on when loading the module]'
+    '-fms-compatibility[enable full Microsoft Visual C++ compatibility]'
+    '-fms-compatibility-version=[microsoft compiler version number]:arg'
+    '-fmsc-version=[microsoft compiler version number to report]:arg'
+    '-fms-memptr-rep=[ms memptr rep]:arg'
+    '-fms-volatile[ms volatile]'
+    '-fnested-functions[nested functions]'
+    '-fnew-alignment=[specifies the largest alignment guaranteed]:align'
+    '-fnext-runtime[next runtime]'
+    '-fno-builtin-[disable implicit builtin knowledge of a specific function]:arg'
+    '-fno-crash-diagnostics[disable auto-generation of preprocessed source files and a script for reproduction during a clang crash]'
+    '-fno-limit-debug-info[no limit debug info]'
+    '-fno-max-type-align[no max type align]'
+    '-fno_modules-validate-input-files-content[no modules validate input files content]'
+    '-fno_pch-validate-input-files-content[no pch validate input files content]'
+    '-fno-strict-modules-decluse[no strict modules decluse]'
+    '-fno-temp-file[directly create compilation output files]'
+    '-fno-working-directory[no working directory]'
+    '-fnoxray-link-deps[no xray link deps]'
+    '-fobjc-abi-version=-[set Objective-C ABI version]:version'
+    '-fobjc-arc-exceptions[use EH-safe code when synthesizing retains and releases in -fobjc-arc]'
+    '-fobjc-arc[synthesize retain and release calls for Objective-C pointers]'
+    '-fobjc-convert-messages-to-runtime-calls[convert messages to runtime calls]'
+    '-fobjc-encode-cxx-class-template-spec[fully encode C++ class template specialization]'
+    '-fobjc-exceptions[enable Objective-C exceptions]'
+    '-fobjc-infer-related-result-type[infer related result type]'
+    '-fobjc-legacy-dispatch[use legacy dispatch]'
+    '-fobjc-link-runtime[set link runtime]'
+    '-fobjc-nonfragile-abi[set nonfragile abi]'
+    '-fobjc-nonfragile-abi-version=-[set nonfragile abi version]:version'
+    '-fobjc-runtime=-[specify the target Objective-C runtime kind and version]:runtime'
+    '-fobjc-sender-dependent-dispatch[set sender dependent dispatch]'
+    '-fobjc-weak[enable ARC-style weak references in Objective-C]'
+    '-fopenmp-targets=[specify comma-separated list of triples OpenMP offloading targets to be supported]:targets'
+    '-fopenmp-version=[openmp version]:version'
+    '-foperator-arrow-depth=[operator arrow depth]:arg'
+    '-foperator-names[treat C++ operator name keywords as synonyms for operators]'
+    '-foptimization-record-file=[specify the output name of the file containing the optimization remarks]:file:_files'
+    '-foptimization-record-passes=[only include passes which match a specified regex]:regex'
+    '-force_cpusubtype_ALL[force cpusubtype all]'
+    '-force_flat_namespace[force flat namespace]'
+    '--force-link=[force link]:arg'
+    '-force_load[force load]:argument'
+    '-forder-file-instrumentation[generate instrumented code to collect order file]'
+    '-foutput-class-dir=[output class dir]:arg'
+    '-fpack-derived[pack derived]'
+    '-fparse-all-comments[parse all comments]'
+    '-fpascal-strings[recognize and construct Pascal-style string literals]'
+    '-fpass-plugin=[load pass plugin from a dynamic shared object file]:dsopath'
+    '-fpatchable-function-entry=[generate NOPs around function entry]:N,M'
+    '-fpch-codegen[generate code for uses of this PCH]'
+    '-fpch-debuginfo[generate debug info for types in an object file built from this PCH]'
+    '-fpch-instantiate-templates[instantiate templates already while building a PCH]'
+    '-fpch-validate-input-files-content[validate PCH input files based on content]'
+    '-fprebuilt-implicit-modules[look up implicit modules]'
+    '-fprebuilt-module-path=[specify the prebuilt module path]:directory:_files -/'
+    '-fpreserve-as-comments[preserve as comments]'
+    '-fproc-stat-report=[save subprocess statistics to the given file]:arg'
+    '-fprofile-exclude-files=[exclude files from profile]:arg'
+    '-fprofile-filter-files=[filter files for profile]:arg'
+    '-fprofile-instr-generate=[generate instrumented profile into file]::file:_files'
+    '-fprofile-instr-use=[use instrumentation data for profile-guided optimization]::arg'
+    '-fprofile-list=[filename defining the list of items to instrument]:file:_files'
+    '-fprofile-remapping-file=[use the remappings described in file in profile]:file:_files'
+    '-fprofile-sample-accurate[specifies that the sample profile is accurate]'
+    '-fprofile-sample-use=[profile sample use]::arg'
+    '-fprofile-update=[set update method of profile counters]:method'
+    '-fprotect-parens[protect parens]'
+    '-fpseudo-probe-for-profiling[emit pseudo probes for sample profiling]'
+    '*-framework[include framework found in search path]:framework:->framework'
+    '-frange-check[range check]'
+    '-freal-4-real-10[real 4 real 10]'
+    '-freal-4-real-16[real 4 real 16]'
+    '-freal-4-real-8[real 4 real 8]'
+    '-freal-8-real-10[real 8 real 10]'
+    '-freal-8-real-16[real 8 real 16]'
+    '-freal-8-real-4[real 8 real 4]'
+    '-frealloc-lhs[realloc lhs]'
+    '-frecord-command-line[record command line]'
+    '-frecord-marker=[record marker]:arg'
+    '-frecursive[recursive]'
+    '-fregister-global-dtors-with-atexit[use atexit to register global destructors]'
+    '-frelaxed-template-template-args[enable C++17 relaxed template template argument matching]'
+    '-frepack-arrays[repack arrays]'
+    '-freroll-loops[turn on loop reroller]'
+    '-fretain-comments-from-system-headers[retain comments from system headers]'
+    '-frewrite-imports[rewrite imports]'
+    '-frewrite-includes[rewrite includes]'
+    '-frewrite-map-file=[rewrite map file]:arg'
+    '-fropi[generate read-only position independent code (ARM only)]'
+    '-frtlib-add-rpath[add -rpath with architecture-specific resource directory to the linker flags]'
+    '-frtti-data[rtti data]'
+    '-frwpi[generate read-write position independent code (ARM only)]'
+    '-fsanitize-address-destructor-kind=[set destructor type used in ASan instrumentation]:kind'
+    '-fsanitize-address-field-padding=[level of field padding for AddressSanitizer]:arg'
+    '-fsanitize-address-globals-dead-stripping[enable linker dead stripping of globals in AddressSanitizer]'
+    '-fsanitize-address-poison-custom-array-cookie[enable poisoning array cookies when using custom operator new in AddressSanitizer]'
+    '-fsanitize-address-use-after-scope[enable use-after-scope detection in AddressSanitizer]'
+    '-fsanitize-address-use-odr-indicator[enable ODR indicator globals]'
+    '-fsanitize-blacklist=[path to blacklist file for sanitizers]:arg'
+    '-fsanitize-cfi-canonical-jump-tables[make the jump table addresses canonical in the symbol table]'
+    '-fsanitize-cfi-cross-dso[enable control flow integrity (CFI) checks for cross-DSO calls]'
+    '-fsanitize-cfi-icall-generalize-pointers[generalize pointers in CFI indirect call type signature checks]'
+    '-fsanitize-coverage-allowlist=[sanitize coverage allowlist]:arg'
+    '-fsanitize-coverage-blacklist=[disable sanitizer coverage instrumentation]:arg'
+    '-fsanitize-coverage-blocklist=[sanitize coverage blocklist]:arg'
+    '-fsanitize-coverage=[specify the type of coverage instrumentation for Sanitizers]:arg'
+    '-fsanitize-coverage-whitelist=[restrict sanitizer coverage instrumentation]:arg'
+    '-fsanitize-hwaddress-abi=[select the HWAddressSanitizer ABI to target]:arg'
+    '-fsanitize-link-c\+\+-runtime[sanitize link c++ runtime]'
+    '-fsanitize-link-runtime[sanitize link runtime]'
+    '-fsanitize-memory-track-origins=[enable origins tracking in MemorySanitizer]::arg'
+    '-fsanitize-memory-use-after-dtor[enable use-after-destroy detection in MemorySanitizer]'
+    '-fsanitize-minimal-runtime[sanitize minimal runtime]'
+    '-fsanitize-recover=[enable recovery for specified sanitizers]::arg'
+    '-fsanitize-stats[enable sanitizer statistics gathering]'
+    '-fsanitize-system-blacklist[path to system blacklist file for sanitizers]:file:_files'
+    '-fsanitize-thread-atomics[enable atomic operations instrumentation in ThreadSanitizer (default)]'
+    '-fsanitize-thread-func-entry-exit[enable function entry/exit instrumentation in ThreadSanitizer]'
+    '-fsanitize-thread-memory-access[enable memory access instrumentation in ThreadSanitizer]'
+    '-fsanitize-trap=[enable trapping for specified sanitizers]::arg'
+    '-fsanitize-undefined-strip-path-components=[strip a given number of path components when emitting check metadata]:number'
+    '-fsanitize-undefined-trap-on-error[equivalent to -fsanitize-trap=undefined]'
+    '-fsave-optimization-record=[generate an optimization record file in a specific format]::format'
+    '-fsecond-underscore[second underscore]'
+    '-fseh-exceptions[use SEH style exceptions]'
+    '-fsemantic-interposition[semantic interposition]'
+    '-fshow-column[show the column]'
+    '-fshow-overloads=[which overload candidates to show when overload resolution fails]:arg'
+    '-fshow-source-location[show source location]'
+    '-fsignaling-math[signaling math]'
+    '-fsign-zero[sign zero]'
+    '-fsized-deallocation[enable C++14 sized global deallocation functions]'
+    '-fsjlj-exceptions[use SjLj style exceptions]'
+    '-fslp-vectorize[enable the superword-level parallelism vectorization passes]'
+    '-fspell-checking-limit=[spell checking limit]:arg'
+    '-fspell-checking[spell checking]'
+    '-fsplit-dwarf-inlining[provide minimal debug info in the object]'
+    '-fsplit-lto-unit[enables splitting of the LTO unit]'
+    '-fsplit-machine-functions[enable late function splitting using profile information]'
+    '-fstack-arrays[stack arrays]'
+    '-fstack-clash-protection[enable stack clash protection]'
+    '-fstack-size-section[emit section containing metadata on function stack sizes]'
+    '-fstandalone-debug[emit full debug info for all types used by the program]'
+    '-fstrict-float-cast-overflow[assume that overflowing float-to-int casts are undefined]'
+    '-fstrict-return[strict return]'
+    '-fstrict-vtable-pointers[enable optimizations based on the strict vtables]'
+    '-fstruct-path-tbaa[struct path tbaa]'
+    '-fsycl[enable SYCL kernels compilation for device]'
+    '-fsymbol-partition=[symbol partition]:arg'
+    '-fsystem-module[build this module as a system module. only used with -emit-module]'
+    '-ftemplate-backtrace-limit=[template backtrace limit]:arg'
+    '-ftemplate-depth--[template depth]:arg'
+    '-ftemplate-depth=[template depth]:arg'
+    '-fterminated-vtables[terminated vtables]'
+    '-fthin-link-bitcode=[write minimized bitcode to <file>]:file:_files'
+    '-fthinlto-index=[perform ThinLTO importing using provided index]:arg'
+    '-fthreadsafe-statics[threadsafe statics]'
+    '-ftime-trace-granularity=[minimum time granularity traced by time profiler]:microseconds'
+    '-ftime-trace[turn on time profiler]'
+    '-ftrap-function=[issue call to specified function rather than a trap instruction]:function name'
+    '-ftrapv-handler=[specify the function to be called on overflow]:function name'
+    '-ftrigraphs[process trigraph sequences]'
+    '-ftrivial-auto-var-init=[initialize trivial automatic stack variables]:arg'
+    '-ftrivial-auto-var-init-stop-after=[stop initializing trivial automatic stack variables after the specified number of instances]:arg'
+    '-funderscoring[underscoring]'
+    '-funique-basic-block-section-names[use unique names for basic block sections]'
+    '-funique-internal-linkage-names[uniqueify Internal Linkage Symbol Names]'
+    '-funique-section-names[unique section names]'
+    '-funit-at-a-time[unit at a time]'
+    '-fuse-cuid=[method to generate ids for compilation units for single source offloading languages CUDA and HIP]:argument'
+    '-fuse-cxa-atexit[use cxa atexit]'
+    '-fuse-init-array[use init array]'
+    '-fuse-line-directives[use #line in preprocessed output]'
+    '-fvalidate-ast-input-files-content[compute and store the hash of input files used to build an AST]'
+    '-fveclib=[use the given vector functions library]:arg'
+    '-fvectorize[enable the loop vectorization passes]'
+    '-fvirtual-function-elimination[enables dead virtual function elimination optimization]'
+    '-fvisibility-dllexport=[the visibility for dllexport defintions]:arg'
+    '-fvisibility-externs-dllimport=[the visibility for dllimport external declarations]:arg'
+    '-fvisibility-externs-nodllstorageclass=[the visibility for external declarations without an explicit DLL dllstorageclass]:arg'
+    '-fvisibility-from-dllstorageclass[set the visiblity of symbols in the generated code from their DLL storage class]'
+    '-fvisibility-global-new-delete-hidden[give global C++ operator new and delete declarations hidden visibility]'
+    '-fvisibility-inlines-hidden[give inline C++ member functions hidden visibility by default]'
+    '-fvisibility-inlines-hidden-static-local-var[visibility inlines hidden static local var]'
+    '-fvisibility-ms-compat[give global types and functions a specific visibility]'
+    '-fvisibility-nodllstorageclass=[the visibility for defintiions without an explicit DLL export class]:arg'
+    '-fwasm-exceptions[use WebAssembly style exceptions]'
+    '-fwhole-file[whole file]'
+    '-fwhole-program-vtables[enables whole-program vtable optimization]'
+    '-fwritable-strings[store string literals as writable data]'
+    '-fxl-pragma-pack[enable IBM XL #pragma pack handling]'
+    '-fxor-operator[enable .XOR. as a synonym of .NEQV.]'
+    '-fxray-always-emit-customevents[always emit xray customevent calls]'
+    '-fxray-always-emit-typedevents[always emit xray typedevents calls]'
+    '-fxray-always-instrument=[file defining xray always instrument]:file:_files'
+    '-fxray-attr-list=[file defining the list of xray attributes]:file:_files'
+    '-fxray-function-groups=[only instrument 1 of N groups]:arg'
+    '-fxray-function-index[xray function index]'
+    "-fxray-ignore-loops[don't instrument functions with loops unless they also meet the minimum function size]"
+    '-fxray-instruction-threshold=[sets the minimum function size to instrument with XRay]:arg'
+    '-fxray-instrumentation-bundle=[select which XRay instrumentation points to emit]:arg'
+    '-fxray-instrument[generate XRay instrumentation sleds on function entry and exit]'
+    '-fxray-link-deps[tells clang to add the link dependencies for XRay]'
+    '-fxray-modes=[list of modes to link in by default into XRay instrumented binaries]:arg'
+    '-fxray-never-instrument=[file defining the whitelist for Xray attributes]:file:_files'
+    '-fxray-selected-function-group=[select which group of functions to instrument]:arg'
+    '-fzvector[enable System z vector language extension]'
+    {-gcc-toolchain=,--gcc-toolchain=}'[use the gcc toolchain at the given directory]:directory:_files -/'
+    '-gcodeview[generate CodeView debug information]'
+    {-gcodeview-ghash,-gno-codeview-ghash}'[emit type record hashes is a .debug section]'
+    '-gcolumn-info[column info]'
+    '-gdwarf-aranges[DWARF aranges]'
+    '-gembed-source[embed source text in DWARF debug sections]'
+    '-gfull[emit debugging information for all symbols and types]'
+    {-G-,-G=-,-msmall-data-limit=,-msmall-data-threshold}'[put objects of at most size bytes into small data section]:size'
+    '-ggnu-pubnames[gnu pubnames]'
+    '-ginline-line-tables[inline line tables]'
+    '-gline-directives-only[emit debug line info directives only]'
+    '-gline-tables-only[line tables only]'
+    '-glldb[lldb]'
+    '-gmlt[emit debug line number tables only]'
+    '-gmodules[generate debug info with external references]'
+    '-gno-column-info[no column info]'
+    '-gno-embed-source[no embed source]'
+    '-gno-gnu-pubnames[no gnu pubnames]'
+    '-gno-inline-line-tables[no inline line tables]'
+    '-gno-record-command-line[no record command line]'
+    '--gpu-instrument-lib=[instrument device library for HIP]:argument'
+    '--gpu-max-threads-per-block=[default max threads per block for kernel launch bounds for HIP]'
+    '-grecord-command-line[record command line]'
+    '-gsce[sce]'
+    '-gused[emit debugging information for symbols that are used]'
+    '-gz=[DWARF debug sections compression type]::arg'
+    '-headerpad_max_install_names[headerpad max install names]:argument'
+    '-help[display this information]'
+    '--help-hidden[display help for hidden options]'
+    '--hip-device-lib=[hIP device library]:arg'
+    '--hip-device-lib-path=[hip device lib path]:arg'
+    '--hip-link[link clang-offload-bundler bundles for HIP]'
+    '--hip-version=[HIP version in the format of major.minor.patch]'
+    '-ibuiltininc[enable builtin #include directories even when -nostdinc is used before or after -ibuiltininc]'
+    '-iframework[add directory to SYSTEM framework search path]:directory:_files -/'
+    '-iframeworkwithsysroot[add directory to SYSTEM framework search path, absolute paths are relative to -isysroot]:directory:_files -/'
+    '-image_base[image base]:argument'
+    '-include-pch[include precompiled header file]:file:_files'
+    '-index-header-map[make the next included directory (-I or -F) an indexer header map]'
+    '-init[init]:arg'
+    '-install_name[install name]:arg'
+    '-integrated-as[integrated as]'
+    '-interface-stub-version=[interface stub version]:arg'
+    '-isystem-after[add directory to end of the SYSTEM include search path]:directory:_files -/'
+    '-ivfsoverlay[overlay the virtual filesystem described by file over the real file system]:arg'
+    '-iwithsysroot[add directory to SYSTEM include search path]:directory:_files -/'
+    '-J[this option specifies where to put .mod files for compiled modules]:arg'
+    '-keep_private_externs[keep private externs]'
+    '*-lazy_framework[lazy framework]:framework:->framework'
+    '*-lazy_library[lazy library]:arg'
+    '--ld-path=[ld path]:arg'
+    '--libomptarget-amdgcn-bc-path=[path to libomptarget-amdgcn bitcode library]:arg'
+    '--libomptarget-nvptx-bc-path=[path to libomptarget-nvptx bitcode library]:arg'
+    '--library-directory=[add directory to library search path]:directory:_files -/'
+    '-maix-struct-return[return all structs in memory]'
+    "-malign-branch-boundary=[specify the boundary's size to align branches]:size"
+    '-malign-branch=[specify types of branches to align]:arg'
+    '-mappletvos-version-min=[appletvos version min]:arg'
+    '-mappletvsimulator-version-min=[appletvsimulator version min]:arg'
+    '-mbackchain[link stack frames through backchain on System Z]'
+    '-mbig-endian[big endian]'
+    '-mbranches-within-32B-boundaries[align selected branches within 32-byte boundary]'
+    '-mbranch-protection=[enforce targets of indirect branches and function returns]:arg'
+    '-mcode-object-v3[legacy option to specify code object ABI V3]'
+    '-mcode-object-version=[specify code object ABI version]:version'
+    '-mconsole[console]:arg'
+    '-mcrc[allow use of CRC instructions]'
+    '-mdefault-build-attributes[default build attributes]:arg'
+    '-mdll[dll]:arg'
+    '-mdouble=[force double to be 32 bits or 64 bits]:arg'
+    '-mdynamic-no-pic[dynamic no pic]:arg'
+    '-meabi[set EABI type]:arg'
+    '-menable-experimental-extensions[enable use of experimental RISC-V extensions]'
+    '-menable-unsafe-fp-math[allow unsafe floating-point math optimizations which may decrease precision]'
+    '-mfix-cortex-a53-835769[workaround Cortex-A53 erratum 835769]'
+    '-mfloat-abi=[float abi]:arg'
+    '-mfpu=[fpu]:arg'
+    '-mglobal-merge[enable merging of globals]'
+    '-mharden-sls=[select straight-line speculation hardening scope]:arg'
+    '--mhwdiv=[hwdiv]:arg'
+    '-mhwdiv=[hwdiv]:arg'
+    '-mhwmult=[hwmult]:arg'
+    '-mignore-xcoff-visibility[do not emit the visibility attribute for asm]'
+    '--migrate[run the migrator]'
+    '-mimplicit-float[implicit float]'
+    '-mimplicit-it=[implicit it]:arg'
+    '-mincremental-linker-compatible[emit an object file which can be used with an incremental linker]'
+    '-mios-simulator-version-min=[ios simulator version min]:arg'
+    '-mios-version-min=[ios version min]:arg'
+    '-miphoneos-version-min=[iphoneos version min]:arg'
+    '-miphonesimulator-version-min=[iphonesimulator version min]:arg'
+    '-mkernel[kernel]'
+    '-mlinker-version=[linker version]:arg'
+    '-mlittle-endian[little endian]'
+    "-mllvm[additional arguments to forward to LLVM's option processing]:arg"
+    '-mlong-calls[generate branches with extended addressability]'
+    '-mlvi-cfi[enable only control-flow mitigations for Load Value Injection]'
+    '-mlvi-hardening[enable all mitigations for Load Value Injection]'
+    '-mmacos-version-min=[set Mac OS X deployment target]:arg'
+    '-mmacosx-version-min=[macosx version min]:arg'
+    '-mmcu=[mcu]:arg'
+    '-module-dependency-dir[directory to dump module dependencies to]:arg'
+    '-module-dir[odule dir]:dir'
+    '-module-file-info[provide information about a particular module file]'
+    '-moslib=[oslib]:arg'
+    '-moutline-atomics[generate local calls to out-of-line atomic operations]'
+    '-mpacked-stack[use packed stack layout]'
+    '-mpad-max-prefix-size=[specify maximum number of prefixes to use for padding]:arg'
+    '-mpie-copy-relocations[pie copy relocations]'
+    '-mprefer-vector-width=[specifies preferred vector width]:arg'
+    '-mqdsp6-compat[enable hexagon-qdsp6 backward compatibility]'
+    '-mrelax-all[relax all machine instructions]'
+    '-mrelax[enable linker relaxation]'
+    '-mretpoline[retpoline]'
+    '-mseses[enable speculative execution side effect suppression (SESES)]'
+    '-msign-return-address=[select return address signing scope]:arg'
+    '-msim[sim]'
+    '-mspeculative-load-hardening[speculative load hardening]'
+    '-mstack-alignment=[set the stack alignment]:arg'
+    '-mstack-probe-size=[set the stack probe size]:size'
+    '-mstack-protector-guard-offset=[use the given offset for addressing the stack-protector guard]:arg'
+    '-mstack-protector-guard-reg=[use the given reg for addressing the stack-protector guard]:reg'
+    '-msvr4-struct-return[return small structs in registers]'
+    '-mthread-model[the thread model to use]:arg'
+    '-mthumb[thumb]'
+    '-mtls-size=[specify bit size of immediate TLS offsets]:arg'
+    '-mtvos-simulator-version-min=[tvos simulator version min]:arg'
+    '-mtvos-version-min=[tvos version min]:arg'
+    '-multi_module[multi module]'
+    '-multiply_defined[multiply defined]:arg'
+    '-multiply_defined_unused[multiply defined unused]:arg'
+    '-municode[unicode]:arg'
+    '-munsafe-fp-atomics[enable unsafe floating point atomic instructions]'
+    '-mv55[equivalent to -mcpu=hexagonv55]'
+    '-mv5[equivalent to -mcpu=hexagonv5]'
+    '-mv60[equivalent to -mcpu=hexagonv60]'
+    '-mv62[equivalent to -mcpu=hexagonv62]'
+    '-mv65[equivalent to -mcpu=hexagonv65]'
+    '-mv66[equivalent to -mcpu=hexagonv66]'
+    '-mv67[equivalent to -mcpu=hexagonv67]'
+    '-mv67t[equivalent to -mcpu=hexagonv67t]'
+    '-mv68[equivalent to -mcpu=hexagonv68]'
+    '-mvx[vx]'
+    '-mwarn-nonportable-cfstrings[warn nonportable cfstrings]'
+    '-mwatchos-simulator-version-min=[watchos simulator version min]:arg'
+    '-mwatchos-version-min=[watchos version min]:arg'
+    '-mwatchsimulator-version-min=[watchsimulator version min]:arg'
+    '-mwavefrontsize64[specify wavefront size 64 mode]'
+    '-mwindows[windows]:arg'
+    '-mzvector[zvector]'
+    '-nobuiltininc[do not search builtin directory for include files]'
+    '-nocpp[no cpp]'
+    '-nocudainc[do not add include paths for CUDA/HIP and do not include the default CUDA/HIP wrapper headers]'
+    '*--no-cuda-include-ptx=[do not include ptx for the following gpu architecture]:argument'
+    '-nocudalib[do not link device library for CUDA/HIP device compilation]'
+    '--no-cuda-noopt-device-debug[disable device-side debug info generation]'
+    "--no-cuda-version-check[don't error out if the detected version of the CUDA install is too low for the requested CUDA gpu architecture]"
+    '-no_dead_strip_inits_and_terms[no dead strip inits and terms]'
+    '-nofixprebinding[no fixprebinding]'
+    '-nogpuinc[no gpuinc]'
+    '-nogpulib[no gpulib]'
+    '--no-integrated-cpp[no integrated cpp]'
+    '-no-integrated-cpp[no integrated cpp]'
+    '-nolibc[no libc]'
+    '-nomultidefs[no multidefs]'
+    '--no-offload-arch=[no offload arch]:arg'
+    '-no-pie[no pie]'
+    '-nopie[no pie]'
+    '-noprebind[no prebind]'
+    '-noprofilelib[no profilelib]'
+    '-no-pthread[no pthread]'
+    '-noseglinkedit[no seglinkedit]'
+    '--no-standard-libraries[no standard libraries]'
+    '-nostdinc\+\+[disable standard #include directories for the C++ standard library]'
+    '-nostdlibinc[do not search standard system directories for include files]'
+    '-nostdlib\+\+[no stdlib++]'
+    '--no-system-header-prefix=[no system header prefix]:prefix'
+    '--no-undefined[no undefined]'
+    '-objcmt-atomic-property[make migration to atomic properties]'
+    '-objcmt-migrate-all[enable migration to modern ObjC]'
+    '-objcmt-migrate-annotation[enable migration to property and method annotations]'
+    '-objcmt-migrate-designated-init[enable migration to infer NS_DESIGNATED_INITIALIZER for initializer methods]'
+    '-objcmt-migrate-instancetype[enable migration to infer instancetype for method result type]'
+    '-objcmt-migrate-literals[enable migration to modern ObjC literals]'
+    '-objcmt-migrate-ns-macros[enable migration to NS_ENUM/NS_OPTIONS macros]'
+    '-objcmt-migrate-property-dot-syntax[enable migration of setter/getter messages to property-dot syntax]'
+    '-objcmt-migrate-property[enable migration to modern ObjC property]'
+    '-objcmt-migrate-protocol-conformance[enable migration to add protocol conformance on classes]'
+    '-objcmt-migrate-readonly-property[enable migration to modern ObjC readonly property]'
+    '-objcmt-migrate-readwrite-property[enable migration to modern ObjC readwrite property]'
+    '-objcmt-migrate-subscripting[enable migration to modern ObjC subscripting]'
+    "-objcmt-ns-nonatomic-iosonly[enable migration to use NS_NONATOMIC_IOSONLY macro for setting property's atomic attribute]"
+    '-objcmt-returns-innerpointer-property[enable migration to annotate property with NS_RETURNS_INNER_POINTER]'
+    '-objcmt-whitelist-dir-path=[objcmt whitelist dir path]:arg'
+    '-objcmt-white-list-dir-path=[only modify files with a filename contained in the provided directory path]:arg'
+    '-ObjC[treat source files as Objective-C]'
+    '-ObjC\+\+[treat source files as Objective-C++]'
+    '-object[object]'
+    '--offload-arch=[offload arch]:arg'
+    '--output-class-directory=[output class directory]:arg'
+    '-pagezero_size[pagezero size]:arg'
+    '-pg[enable mcount instrumentation]'
+    {-p,--profile}'[enable function profiling for prof]'
+    '-prebind_all_twolevel_modules[prebind all twolevel modules]'
+    '-prebind[prebind]'
+    '--precompile[only precompile the input]'
+    '-preload[preload]'
+    '--print-diagnostic-categories[print diagnostic categories]'
+    '-print-effective-triple[print effective triple]'
+    '--print-effective-triple[print the effective target triple]'
+    '--print-file-name=[print the full library path of <file>]:file:_files'
+    '-print-ivar-layout[enable Objective-C Ivar layout bitmap print trace]'
+    '--print-libgcc-file-name[print the library path for the currently used compiler runtime library]'
+    '--print-multi-directory[print multi directory]'
+    '--print-multi-lib[print multi lib]'
+    '--print-prog-name=[print the full program path of <name>]:name'
+    '-print-resource-dir[print resource dir]'
+    '--print-resource-dir[print the resource directory pathname]'
+    '--print-search-dirs[print the paths used for finding libraries and programs]'
+    '--print-supported-cpus[print supported cpus]'
+    '-print-supported-cpus[print supported cpus]'
+    '-print-targets[print targets]'
+    '--print-targets[print the registered targets]'
+    '-print-target-triple[print target triple]'
+    '--print-target-triple[print the normalized target triple]'
+    '-private_bundle[private bundle]'
+    '--profile-blocks[undocumented option]'
+    '-pthreads[pthreads]'
+    '-pthread[support POSIX threads in generated code]'
+    '--ptxas-path=[path to ptxas (used for compiling CUDA code)]:arg'
+    "-Qunused-arguments[don't emit warning for unused driver arguments]"
+    '-read_only_relocs[read only relocs]:arg'
+    '-relocatable-pch[relocatable pch]'
+    '--relocatable-pch[whether to build a relocatable precompiled header]'
+    '-R[enable the specified remark]:remark'
+    '--resource=[resource]:arg'
+    '-rewrite-legacy-objc[rewrite Legacy Objective-C source to C++]'
+    '-rewrite-objc[rewrite Objective-C source to C++]'
+    '--rocm-device-lib-path=[rOCm device library path]:arg'
+    '--rocm-path=[rOCm installation path]:arg'
+    '-Rpass-analysis=[report transformation analysis from optimization passes]:regex'
+    '-Rpass-missed=[report missed transformations by optimization passes]:arg'
+    '-Rpass=[report transformations performed by optimization passes]:arg'
+    '-rpath[rpath]:arg'
+    '-r[product a relocatable object as output]'
+    '--rtlib=[compiler runtime library to use]:arg'
+    '-rtlib=[rtlib]:arg'
+    '--save-stats=[save llvm statistics]:arg'
+    '-sectalign[sectalign]:arg'
+    '-sectcreate[sectcreate]:arg'
+    '-sectobjectsymbols[sectobjectsymbols]:arg'
+    '-sectorder[sectorder]:arg'
+    '-seg1addr[seg1addr]:arg'
+    '-segaddr[segaddr]:arg'
+    '-seg_addr_table_filename[seg addr table filename]:arg'
+    '-seg_addr_table[seg addr table]:arg'
+    '-segcreate[segcreate]:arg'
+    '-seglinkedit[seglinkedit]'
+    '-segprot[segprot]:arg'
+    '-segs_read_only_addr[segs read only addr]:arg'
+    '-segs_read_[segs read]:arg'
+    '-segs_read_write_addr[segs read write addr]:arg'
+    '--serialize-diagnostics[serialize compiler diagnostics to a file]:arg'
+    '-serialize-diagnostics[serialize diagnostics]:arg'
+    '-shared-libasan[dynamically link the sanitizer runtime]'
+    '-shared-libsan[shared libsan]'
+    '--shared[shared]'
+    '--signed-char[signed char]'
+    '-single_module[single module]'
+    '--specs=[specs]:arg'
+    '-static-libgfortran[static libgfortran]'
+    '-static-libsan[statically link the sanitizer runtime]'
+    '-static-libstdc\+\+[static libstdc++]'
+    '-static-openmp[use the static host OpenMP runtime while linking.]'
+    '-static-pie[static pie]'
+    '--static[static]'
+    '-std-default=[std default]:arg'
+    '--stdlib=[c++ standard library to use]:arg'
+    '-stdlib\+\+-isystem[use directory as the C++ standard library include path]:directory:_files -/'
+    '-stdlib=[stdlib]:arg'
+    '-sub_library[sub library]:arg'
+    '-sub_umbrella[sub umbrella]:arg'
+    '-sycl-std=[SYCL language standard to compile for]:standard'
+    '--system-header-prefix=[treat all #include paths starting with <prefix> as including a system header]:prefix'
+    '-target[generate code for the given target]:arg'
+    '--target=[target]:arg'
+    '-Tbss[set starting address of BSS to <addr>]:addr'
+    '-Tdata[set starting address of DATA to <addr>]:addr'
+    '--traditional[traditional]'
+    '-traditional[traditional]'
+    '-Ttext[set starting address of TEXT to <addr>]:addr'
+    '-t[undocumented option]'
+    '-twolevel_namespace_hints[twolevel namespace hints]'
+    '-twolevel_namespace[twolevel namespace]'
+    '-umbrella[umbrella]:arg'
+    '-undefined[undefined]:arg'
+    '-unexported_symbols_list[unexported symbols list]:arg'
+    '--unsigned-char[unsigned char]'
+    '--unwindlib=[unwind library to use]:arg'
+    '-unwindlib=[unwindlib]:arg'
+    '--verify-debug-info[verify the binary representation of debug output]'
+    '-verify-pch[load and verify that a pre-compiled header file is not stale]'
+    '--warn-=-[enable the specified warning]:warning:->warning'
+    '*-weak_framework[weak framework]:framework:->framework'
+    '*-weak_library[weak library]:arg'
+    '-weak-l[weak l]:arg'
+    '-weak_reference_mismatches[weak reference mismatches]:arg'
+    '-whatsloaded[whatsloaded]'
+    '-whyload[whyload]'
+    '-working-directory=[resolve file paths relative to the specified directory]:arg'
+    '-Xanalyzer[pass <arg> to the static analyzer]:arg'
+    '-Xarch_device[pass arg to CUDA/HIP device compilation]:argument'
+    '-Xarch_host[pass arg to CUDA/HIP host compilation]:argument'
+    '-Xclang[pass <arg> to the clang compiler]:arg'
+    '-Xcuda-fatbinary[pass arg to fatbinary invocation]:argument'
+    '-Xcuda-ptxas[pass arg to the ptxas assemler]:argument'
+    '-Xflang[pass <arg> to the flang compiler]:arg'
+    '-Xopenmp-target[pass arg to the the target offloading toolchain]:argument'
+    '-y[the action to perform on the input]:arg'
+    '-Z-[undocumented option]:argument'
+  )
 else
-    args+=(
-      '-flto=-[Enable link-time optimization]::jobs:'
-      '*--help=-[Display this information]:class:->help'
-    )
+  args+=(
+    '--dump=[dump information]:argument'
+    '-flto=-[enable link-time optimization]::jobs:'
+    '*--help=-[display this information]:class:->help'
+  )
 fi
 
 local -a sanitizers
-    sanitizers=(
-        address alignment bool bounds enum float-cast-overflow float-divide-by-zero
-        integer-divide-by-zero memory nonnull-attribute null nullability-arg nullability-assign
-        nullability-return object-size pointer-overflow return unsigned-integer-overflow
-        returns-nonnull-attribute shift signed-integer-overflow unreachable vla-bound vptr
-    )
+sanitizers=(
+  address alignment bool bounds enum float-cast-overflow float-divide-by-zero
+  integer-divide-by-zero memory nonnull-attribute null nullability-arg
+  nullability-assign nullability-return object-size pointer-overflow return
+  unsigned-integer-overflow returns-nonnull-attribute shift signed-integer-overflow
+  unreachable vla-bound vptr
+)
 
 local -a languages
 languages=(
-  c  c-header  cpp-output
-  c++  c++-header  c++-cpp-output
-  objective-c  objective-c-header  objective-c-cpp-output
-  objective-c++ objective-c++-header objective-c++-cpp-output
-  assembler  assembler-with-cpp
-  ada
-  f77  f77-cpp-input f95  f95-cpp-input
-  go
-  java
-  brig
-  none
-)
-
-# generic options (from --help)
-args+=(
-  '-###[print commands to run this compilation]'
-  '-o:output file:_files -g "^*.(c|h|cc|C|cxx|cpp|hpp)(-.)"'
-  '-x[Specify the language of the following input files]:input file language:('"$languages"')'
-  '+e-:virtual function definitions in classes:((0\:only\ interface 1\:generate\ code))'
-  '-d-:dump:->dump'
-  '-g-::debugging information type or level:(0 1 2 3 gdb coff stabs stabs+ dwarf dwarf+ dwarf-2 dwarf-3 dwarf-4 xcoff xcoff+)'
-  '-O-::optimization level:((0 1 2 3 g\:optimize\ for\ debugging\ experience s\:optimize\ for\ space fast\:optimize\ for\ speed\ disregarding\ exact\ standards\ compliance))'
-  '*-M-::output dependencies:((M\:only\ user\ header\ files MD\:output\ to\ file G\:treat\ missing\ header\ files\ as\ generated))'
-  '*-A-:define assertion:'
-  '*-D-:define macro:'
-  '*-U-:undefine macro:'
-  '-C[do not discard comments during preprocess]'
-  '-CC[do not discard comments, including macro expansion]'
-  '-P[inhibit generation of linkemakers during preprocess]'
-  '-H[print name of each header file used]'
-  '-E[Preprocess only; do not compile, assemble or link]'
-  '-S[Compile only; do not assemble or link]'
-  '-c[Compile and assemble, but do not link]'
-  '*-Wp,-:preprocessor option:'
-  '*-Wl,-:linker option:'
-  '*-Xpreprocessor:preprocessor option:'
-  '*-Xlinker:linker option:'
-  '*-Xassembler:assembler option:'
-  '*-u:pretend symbol to be undefined:'
-  '*-Wa,-:assembler option:'
-  '*-l:library:->library'
-  '*-L-:library search path:_files -/'
-  '*-I-:header file search path:_files -/'
-  '-B-[Add <prefix> to the compiler'\''s search paths]:executable prefix:_files -/'
-  '-b:target machine:'
-  '-V:specify compiler version:'
-  '--version[Display compiler version information]'
-  '-print-file-name=-[Display the full path to library <library>]:library:->library'
-  '-print-prog-name=-[Display the full path to compiler component <program>]:program:'
-  '*-specs=-[Override built-in specs with the contents of <file>]:file:_files'
-  '-std=-[assume that the input sources are for specified standard]:standard:(c90 c89 iso9899\:1990 iso9899\:199409 c99 iso9899\:1999 c11 iso9899\:2011 gnu90 gnu89 gnu99 gnu11 c++98 c++03 gnu++98 gnu++03 c++11 gnu++11 c++1y gnu++1y c++14 gnu++14 c++1z gnu++1z c++17 iso9899\:2017 gnu++17 c++2a gnu++2a)'
-  '*-include:include file:_files -g \*.h\(-.\)'
-  '*-imacros:macro input file:_files -g \*.h\(-.\)'
-  '*-idirafter:second include path directory:_files -/'
-  '*-iprefix:prefix:_files'
-  '*-iwithprefix:second include path directory:_files -/'
-  '*-iwithprefixbefore:main include path directory:_files -/'
-  '*-isystem:second include path directory (system):_files -/'
-  '--sysroot=-[Use <directory> as the root directory for headers and libraries]:directory:_files -/'
-  '-pass-exit-codes[Exit with highest error code from a phase]'
-  '--target-help[Display target specific command line options]'
-  '-dumpspecs[Display all of the built in spec strings]'
-  '-dumpversion[Display the version of the compiler]'
-  '-dumpmachine[Display the compiler'\''s target processor]'
-  '-print-search-dirs[Display the directories in the compiler'\''s search path]'
-  '-print-libgcc-file-name[Display the name of the compiler'\''s companion library]'
-  '-print-multiarch[Display the target'\''s normalized GNU triplet, used as a component in the library path]'
-  '-print-multi-directory[Display the root directory for versions of libgcc]'
-  '-print-multi-lib[Display the mapping between command line options and multiple library search directories]'
-  '-print-multi-os-directory[Display the relative path to OS libraries]'
-  '-print-sysroot[Display the target libraries directory]'
-  '-print-sysroot-headers-suffix[Display the sysroot suffix used to find headers]'
-  '-save-stats=-[Save code generation statistics]:location:(cwd obj)'
-  '-save-temps[Do not delete intermediate files]'
-  '-no-canonical-prefixes[Do not canonicalize paths when building relative prefixes to other gcc components]'
-  '-pipe[Use pipes rather than intermediate files]'
-  '-pie[Create a position independent executable]'
-  '-shared[Create a shared library]'
-  '-time[Time the execution of each subprocess]'
+  c c-header cpp-output c++ c++-header c++-cpp-output objective-c objective-c-header
+  objective-c-cpp-output objective-c++ objective-c++-header objective-c++-cpp-output
+  assembler assembler-with-cpp ada f77 f77-cpp-input f95 f95-cpp-input go java
+  brig none
 )
 
 # warnings (from --help=warnings), note some -W options are listed by --help=common instead
-args+=(
-# --help=warnings,^joined
-  '-W[This switch is deprecated; use -Wextra instead]'
-  '-Wabi-tag[Warn if a subobject has an abi_tag attribute that the complete object type does not have]'
-  '-Wabi[Warn about things that will change when compiling with an ABI-compliant compiler]'
-  '-Waddress[Warn about suspicious uses of memory addresses]'
-  '-Waggregate-return[Warn about returning structures, unions or arrays]'
-  '-Waggressive-loop-optimizations[Warn if a loop with constant number of iterations triggers undefined behavior]'
-  '-Waliasing[Warn about possible aliasing of dummy arguments]'
-  '-Walign-commons[Warn about alignment of COMMON blocks]'
-  '-Wall[Enable most warning messages]'
-  '-Walloc-zero[Warn for calls to allocation functions that specify zero bytes]'
-  '-Walloca[Warn on any use of alloca]'
-  '-Wampersand[Warn about missing ampersand in continued character constants]'
-  '-Wargument-mismatch[Warn about type and rank mismatches between arguments and parameters]'
-  '-Warray-bounds[Warn if an array is accessed out of bounds]'
-  '-Warray-temporaries[Warn about creation of array temporaries]'
-  '-Wassign-intercept[Warn whenever an Objective-C assignment is being intercepted by the garbage collector]'
-  '-Wattributes[Warn about inappropriate attribute usage]'
-  '-Wbad-function-cast[Warn about casting functions to incompatible types]'
-  '-Wbool-compare[Warn about boolean expression compared with an integer value different from true/false]'
-  '-Wbool-operation[Warn about certain operations on boolean expressions]'
-  '-Wbuiltin-declaration-mismatch[Warn when a built-in function is declared with the wrong signature]'
-  '-Wbuiltin-macro-redefined[Warn when a built-in preprocessor macro is undefined or redefined]'
-  '-Wc++-compat[Warn about C constructs that are not in the common subset of C and C++]'
-  '-Wc++0x-compat[Deprecated in favor of -Wc++11-compat]'
-  '-Wc++1z-compat[Warn about C++ constructs whose meaning differs between ISO C++ 2014 and (forthcoming) ISO C++ 201z(7?)]'
-  '-Wc++11-compat[Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011]'
-  '-Wc++14-compat[Warn about C++ constructs whose meaning differs between ISO C++ 2011 and ISO C++ 2014]'
-  '-Wc-binding-type[Warn if the type of a variable might be not interoperable with C]'
-  '-Wc90-c99-compat[Warn about features not present in ISO C90, but present in ISO C99]'
-  '-Wc99-c11-compat[Warn about features not present in ISO C99, but present in ISO C11]'
-  '-Wcast-align[Warn about pointer casts which increase alignment]'
-  '-Wcast-qual[Warn about casts which discard qualifiers]'
-  '-Wchar-subscripts[Warn about subscripts whose type is "char"]'
-  '-Wcharacter-truncation[Warn about truncated character expressions]'
-  '-Wchkp[Warn about memory access errors found by Pointer Bounds Checker]'
-  '-Wclobbered[Warn about variables that might be changed by "longjmp" or "vfork"]'
-  '-Wcomment[Warn about possibly nested block comments, and C++ comments spanning more than one physical line]'
-  '-Wcomments[Synonym for -Wcomment]'
-  '-Wcompare-reals[Warn about equality comparisons involving REAL or COMPLEX expressions]'
-  '-Wconditionally-supported[Warn for conditionally-supported constructs]'
-  '-Wconversion-extra[Warn about most implicit conversions]'
-  '-Wconversion-null[Warn for converting NULL from/to a non-pointer type]'
-  '-Wconversion[Warn for implicit type conversions that may change a value]'
-  '-Wcoverage-mismatch[Warn in case profiles in -fprofile-use do not match]'
-  '-Wcpp[Warn when a #warning directive is encountered]'
-  '-Wctor-dtor-privacy[Warn when all constructors and destructors are private]'
-  '-Wdangling-else[Warn about dangling else]'
-  '-Wdate-time[Warn about __TIME__, __DATE__ and __TIMESTAMP__ usage]'
-  '-Wdeclaration-after-statement[Warn when a declaration is found after a statement]'
-  '-Wdelete-incomplete[Warn when deleting a pointer to incomplete type]'
-  '-Wdelete-non-virtual-dtor[Warn about deleting polymorphic objects with non- virtual destructors]'
-  '-Wdeprecated-declarations[Warn about uses of __attribute__((deprecated)) declarations]'
-  '-Wdeprecated[Warn if a deprecated compiler feature, class, method, or field is used]'
-  '-Wdesignated-init[Warn about positional initialization of structs requiring designated initializers]'
-  '-Wdisabled-optimization[Warn when an optimization pass is disabled]'
-  '-Wdiscarded-array-qualifiers[Warn if qualifiers on arrays which are pointer targets are discarded]'
-  '-Wdiscarded-qualifiers[Warn if type qualifiers on pointers are discarded]'
-  '-Wdiv-by-zero[Warn about compile-time integer division by zero]'
-  '-Wdouble-promotion[Warn about implicit conversions from "float" to "double"]'
-  '-Weffc\+\+[Warn about violations of Effective C++ style rules]'
-  '-Wduplicate-decl-specifier[Warn when a declaration has duplicate const, volatile, restrict or _Atomic specifier]'
-  '-Wduplicated-branches[Warn about duplicated branches in if-else statements]'
-  '-Wduplicated-cond[Warn about duplicated conditions in an if-else-if chain]'
-  '-Weffc++[Warn about violations of Effective C++ style rules]'
-  '-Wempty-body[Warn about an empty body in an if or else statement]'
-  '-Wendif-labels[Warn about stray tokens after #else and #endif]'
-  '-Wenum-compare[Warn about comparison of different enum types]'
-#this still exists but makes completing -Werror= less convenient
-  #'-Werror-implicit-function-declaration[This switch is deprecated; use -Werror=implicit-fun
-  '-Wexpansion-to-defined[Warn if "defined" is used outside #if]'
-  '-Wextra[Print extra (possibly unwanted) warnings]'
-  '-Wfloat-conversion[Warn for implicit type conversions that cause loss of floating point precision]'
-  '-Wfloat-equal[Warn if testing floating point numbers for equality]'
-  '-Wformat-contains-nul[Warn about format strings that contain NUL bytes]'
-  '-Wformat-extra-args[Warn if passing too many arguments to a function for its format string]'
-  '-Wformat-nonliteral[Warn about format strings that are not literals]'
-  '-Wformat-overflow[Warn about function calls with format strings that write past the end of the destination region]'
-  '-Wformat-security[Warn about possible security problems with format functions]'
-  '-Wformat-signedness[Warn about sign differences with format functions]'
-  '-Wformat-truncation[Warn about calls to snprintf and similar functions that truncate output. Same as -Wformat- truncation=1.  Same as -Wformat-truncation=]'
-  '-Wformat-y2k[Warn about strftime formats yielding 2-digit years]'
-  '-Wformat-zero-length[Warn about zero-length formats]'
-  '-Wformat[Warn about printf/scanf/strftime/strfmon format string anomalies]'
-  '-Wframe-address[Warn when __builtin_frame_address or __builtin_return_address is used unsafely]'
-  '-Wfree-nonheap-object[Warn when attempting to free a non-heap object]'
-  '-Wfunction-elimination[Warn about function call elimination]'
-  '-Whsa[Warn when a function cannot be expanded to HSAIL]'
-  '-Wignored-attributes[Warn whenever attributes are ignored]'
-  '-Wignored-qualifiers[Warn whenever type qualifiers are ignored]'
-  '-Wimplicit-function-declaration[Warn about implicit function declarations]'
-  '-Wimplicit-int[Warn when a declaration does not specify a type]'
-  '-Wimplicit-interface[Warn about calls with implicit interface]'
-  '-Wimplicit-procedure[Warn about called procedures not explicitly declared]'
-  '-Wimplicit[Warn about implicit declarations]'
-  '-Wincompatible-pointer-types[Warn when there is a conversion between pointers that have incompatible types]'
-  '-Winherited-variadic-ctor[Warn about C++11 inheriting constructors when the base has a variadic constructor]'
-  '-Winit-self[Warn about variables which are initialized to themselves]'
-  '-Winline[Warn when an inlined function cannot be inlined]'
-  '-Wint-conversion[Warn about incompatible integer to pointer and pointer to integer conversions]'
-  '-Wint-in-bool-context[Warn for suspicious integer expressions in boolean context]'
-  '-Wint-to-pointer-cast[Warn when there is a cast to a pointer from an integer of a different size]'
-  '-Winteger-division[Warn about constant integer divisions with truncated results]'
-  '-Wintrinsic-shadow[Warn if a user-procedure has the same name as an intrinsic]'
-  '-Wintrinsics-std[Warn on intrinsics not part of the selected standard]'
-  '-Winvalid-memory-model[Warn when an atomic memory model parameter is known to be outside the valid range]'
-  '-Winvalid-offsetof[Warn about invalid uses of the "offsetof" macro]'
-  '-Winvalid-pch[Warn about PCH files that are found but not used]'
-  '-Wjump-misses-init[Warn when a jump misses a variable initialization]'
-  '-Wline-truncation[Warn about truncated source lines]'
-  '-Wliteral-suffix[Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore]'
-  '-Wlogical-not-parentheses[Warn when logical not is used on the left hand side operand of a comparison]'
-  '-Wlogical-op[Warn when a logical operator is suspiciously always evaluating to true or false]'
-  '-Wlong-long[Do not warn about using "long long" when -pedantic]'
-  '-Wlto-type-mismatch[During link time optimization warn about mismatched types of global declarations]'
-  '-Wmain[Warn about suspicious declarations of "main"]'
-  '-Wmaybe-uninitialized[Warn about maybe uninitialized automatic variables]'
-  '-Wmemset-elt-size[Warn about suspicious calls to memset where the third argument contains the number of elements not multiplied by the element size]'
-  '-Wmemset-transposed-args[Warn about suspicious calls to memset where the third argument is constant literal zero and the second is not]'
-  '-Wmisleading-indentation[Warn when the indentation of the code does not reflect the block structure]'
-  '-Wmissing-braces[Warn about possibly missing braces around initializers]'
-  '-Wmissing-declarations[Warn about global functions without previous declarations]'
-  '-Wmissing-field-initializers[Warn about missing fields in struct initializers]'
-  '-Wmissing-include-dirs[Warn about user-specified include directories that do not exist]'
-  '-Wmissing-parameter-type[Warn about function parameters declared without a type specifier in K&R-style functions]'
-  '-Wmissing-prototypes[Warn about global functions without prototypes]'
-  '-Wmudflap[Warn about constructs not instrumented by -fmudflap]'
-  '-Wmultichar[Warn about use of multi-character character constants]'
-  '-Wmultiple-inheritance[Warn on direct multiple inheritance]'
-  '-Wnamespaces[Warn on namespace definition]'
-  '-Wnarrowing[Warn about narrowing conversions within { } that are ill-formed in C++11]'
-  '-Wnested-externs[Warn about "extern" declarations not at file scope]'
-  '-Wnoexcept-type[Warn if C++1z noexcept function type will change the mangled name of a symbol]'
-  '-Wnoexcept[Warn when a noexcept expression evaluates to false even though the expression can''t actually throw]'
-  '-Wnon-template-friend[Warn when non-templatized friend functions are declared within a template]'
-  '-Wnon-virtual-dtor[Warn about non-virtual destructors]'
-  '-Wnonnull-compare[Warn if comparing pointer parameter with nonnull attribute with NULL]'
-  '-Wnonnull[Warn about NULL being passed to argument slots marked as requiring non-NULL]'
-  '-Wnull-dereference[Warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior]'
-  '-Wodr[Warn about some C++ One Definition Rule violations during link time optimization]'
-  '-Wold-style-cast[Warn if a C-style cast is used in a program]'
-  '-Wold-style-declaration[Warn for obsolescent usage in a declaration]'
-  '-Wold-style-definition[Warn if an old-style parameter definition is used]'
-  '-Wopenmp-simd[Warn if a simd directive is overridden by the vectorizer cost model]'
-  '-Woverflow[Warn about overflow in arithmetic expressions]'
-  '-Woverlength-strings[Warn if a string is longer than the maximum portable length specified by the standard]'
-  '-Woverloaded-virtual[Warn about overloaded virtual function names]'
-  '-Woverride-init-side-effects[Warn about overriding initializers with side effects]'
-  '-Woverride-init[Warn about overriding initializers without side effects]'
-  '-Wpacked-bitfield-compat[Warn about packed bit-fields whose offset changed in GCC 4.4]'
-  '-Wpacked[Warn when the packed attribute has no effect on struct layout]'
-  '-Wpadded[Warn when padding is required to align structure members]'
-  '-Wparentheses[Warn about possibly missing parentheses]'
-  '-Wpedantic[Issue warnings needed for strict compliance to the standard]'
-  '-Wplacement-new[Warn for placement new expressions with undefined behavior.  Same as -Wplacement-new=]'
-  '-Wpmf-conversions[Warn when converting the type of pointers to member functions]'
-  '-Wpointer-arith[Warn about function pointer arithmetic]'
-  '-Wpointer-compare[Warn when a pointer is compared with a zero character constant]'
-  '-Wpointer-sign[Warn when a pointer differs in signedness in an assignment]'
-  '-Wpointer-to-int-cast[Warn when a pointer is cast to an integer of a different size]'
-  '-Wpoison-system-directories[Warn for -I and -L options using system directories if cross compiling]'
-  '-Wpragmas[Warn about misuses of pragmas]'
-  '-Wproperty-assign-default[Warn if a property for an Objective-C object has no assign semantics specified]'
-  '-Wprotocol[Warn if inherited methods are unimplemented]'
-  '-Wreal-q-constant[Warn about real-literal-constants with '\'q\'' exponent-letter]'
-  '-Wrealloc-lhs-all[Warn when a left-hand-side variable is reallocated]'
-  '-Wrealloc-lhs[Warn when a left-hand-side array variable is reallocated]'
-  '-Wredundant-decls[Warn about multiple declarations of the same object]'
-  '-Wregister[Warn about uses of register storage specifier]'
-  '-Wreorder[Warn when the compiler reorders code]'
-  '-Wrestrict[Warn when an argument passed to a restrict- qualified parameter aliases with another argument]'
-  '-Wreturn-local-addr[Warn about returning a pointer/reference to a local or temporary variable]'
-  '-Wreturn-type[Warn whenever a function'\''s return type defaults to "int" (C), or about inconsistent return types (C++)]'
-  '-Wscalar-storage-order[Warn on suspicious constructs involving reverse scalar storage order]'
-  '-Wselector[Warn if a selector has multiple methods]'
-  '-Wsequence-point[Warn about possible violations of sequence point rules]'
-  '-Wshadow-ivar[Warn if a local declaration hides an instance variable]'
-  '-Wshadow[Warn when one variable shadows another.  Same as  -Wshadow=global]'
-  '-Wshift-count-negative[Warn if shift count is negative]'
-  '-Wshift-count-overflow[Warn if shift count >= width of type]'
-  '-Wshift-negative-value[Warn if left shifting a negative value]'
-  '-Wshift-overflow[Warn if left shift of a signed value overflows.  Same as -Wshift-overflow=]'
-  '-Wsign-compare[Warn about signed-unsigned comparisons]'
-  '-Wsign-conversion[Warn for implicit type conversions between signed and unsigned integers]'
-  '-Wsign-promo[Warn when overload promotes from unsigned to signed]'
-  '-Wsized-deallocation[Warn about missing sized deallocation functions]'
-  '-Wsizeof-array-argument[Warn when sizeof is applied on a parameter declared as an array]'
-  '-Wsizeof-pointer-memaccess[Warn about suspicious length parameters to certain string functions if the argument uses sizeof]'
-  '-Wstack-protector[Warn when not issuing stack smashing protection for some reason]'
-  '-Wstrict-aliasing[Warn about code which might break strict aliasing rules]'
-  '-Wstrict-null-sentinel[Warn about uncasted NULL used as sentinel]'
-  '-Wstrict-overflow[Warn about optimizations that assume that signed overflow is undefined]'
-  '-Wstrict-prototypes[Warn about unprototyped function declarations]'
-  '-Wstrict-selector-match[Warn if type signatures of candidate methods do not match exactly]'
-  '-Wstringop-overflow[Warn about buffer overflow in string manipulation functions like memcpy and strcpy.  Same as  -Wstringop-overflow=]'
-  '-Wsubobject-linkage[Warn if a class type has a base or a field whose type uses the anonymous namespace or depends on a type with no linkage]'
+warnings+=(
+  '-Wabi-tag[warn if a subobject has an abi_tag attribute that the complete object type does not have]'
+  '-Wabi[warn about things that will change when compiling with an ABI-compliant compiler]::'
+  '-Waddress[warn about suspicious uses of memory addresses]'
+  '-Waggregate-return[warn about returning structures, unions or arrays]'
+  '-Waggressive-loop-optimizations[warn if a loop with constant number of iterations triggers undefined behavior]'
+  '-Waliasing[warn about possible aliasing of dummy arguments]'
+  '-Walign-commons[warn about alignment of COMMON blocks]'
+  '-Waligned-new=[warn even if '\'new\'' uses a class member allocation function]:none|global|all: '
+  '-Wall[enable most warning messages]'
+  '-Walloca-larger-than=[warn on unbounded uses of alloca, and on bounded uses of alloca whose bound can be larger than <number> bytes]:bytes: '
+  '-Walloca[warn on any use of alloca]'
+  '-Walloc-size-larger-than=[warn for calls to allocation functions that attempt to allocate objects larger than the specified number of bytes]:bytes: '
+  '-Walloc-zero[warn for calls to allocation functions that specify zero bytes]'
+  '-Wampersand[warn about missing ampersand in continued character constants]'
+  '-Wargument-mismatch[warn about type and rank mismatches between arguments and parameters]'
+  '-Warray-bounds[warn if an array is accessed out of bounds]'
+  '-Warray-bounds=[warn if an array is accessed out of bounds]:level:(1 2)'
+  '-Warray-temporaries[warn about creation of array temporaries]'
+  '-Wassign-intercept[warn whenever an Objective-C assignment is being intercepted by the garbage collector]'
+  '-Wattributes[warn about inappropriate attribute usage]'
+  '-Wbad-function-cast[warn about casting functions to incompatible types]'
+  '-Wbool-compare[warn about boolean expression compared with an integer value different from true/false]'
+  '-Wbool-operation[warn about certain operations on boolean expressions]'
+  '-Wbuiltin-declaration-mismatch[warn when a built-in function is declared with the wrong signature]'
+  '-Wbuiltin-macro-redefined[warn when a built-in preprocessor macro is undefined or redefined]'
+  '-Wc++0x-compat[deprecated in favor of -Wc++11-compat]'
+  '-Wc++11-compat[warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011]'
+  '-Wc++14-compat[warn about C++ constructs whose meaning differs between ISO C++ 2011 and ISO C++ 2014]'
+  '-Wc++1z-compat[warn about C++ constructs whose meaning differs between ISO C++ 2014 and (forthcoming) ISO C++ 201z(7?)]'
+  '-Wc90-c99-compat[warn about features not present in ISO C90, but present in ISO C99]'
+  '-Wc99-c11-compat[warn about features not present in ISO C99, but present in ISO C11]'
+  '-Wcast-align[warn about pointer casts which increase alignment]'
+  '-Wcast-qual[warn about casts which discard qualifiers]'
+  '-Wc-binding-type[warn if the type of a variable might be not interoperable with C]'
+  '-Wc++-compat[warn about C constructs that are not in the common subset of C and C++]'
+  '-Wcharacter-truncation[warn about truncated character expressions]'
+  '-Wchar-subscripts[warn about subscripts whose type is "char"]'
+  '-Wchkp[warn about memory access errors found by Pointer Bounds Checker]'
+  '-Wclobbered[warn about variables that might be changed by "longjmp" or "vfork"]'
+  '-Wcomments[synonym for -Wcomment]'
+  '-Wcomment[warn about possibly nested block comments, and C++ comments spanning more than one physical line]'
+  '-Wcompare-reals[warn about equality comparisons involving REAL or COMPLEX expressions]'
+  '-Wconditionally-supported[warn for conditionally-supported constructs]'
+  '-Wconversion-extra[warn about most implicit conversions]'
+  '-Wconversion-null[warn for converting NULL from/to a non-pointer type]'
+  '-Wconversion[warn for implicit type conversions that may change a value]'
+  '-Wcoverage-mismatch[warn in case profiles in -fprofile-use do not match]'
+  '-Wcpp[warn when a #warning directive is encountered]'
+  '-Wctor-dtor-privacy[warn when all constructors and destructors are private]'
+  '-Wdangling-else[warn about dangling else]'
+  '-Wdate-time[warn about __TIME__, __DATE__ and __TIMESTAMP__ usage]'
+  '-Wdeclaration-after-statement[warn when a declaration is found after a statement]'
+  '-Wdelete-incomplete[warn when deleting a pointer to incomplete type]'
+  '-Wdelete-non-virtual-dtor[warn about deleting polymorphic objects with non- virtual destructors]'
+  '-Wdeprecated-declarations[warn about uses of __attribute__((deprecated)) declarations]'
+  '-Wdeprecated[warn if a deprecated compiler feature, class, method, or field is used]'
+  '-Wdesignated-init[warn about positional initialization of structs requiring designated initializers]'
+  '-Wdisabled-optimization[warn when an optimization pass is disabled]'
+  '-Wdiscarded-array-qualifiers[warn if qualifiers on arrays which are pointer targets are discarded]'
+  '-Wdiscarded-qualifiers[warn if type qualifiers on pointers are discarded]'
+  '-Wdiv-by-zero[warn about compile-time integer division by zero]'
+  '-Wdouble-promotion[warn about implicit conversions from "float" to "double"]'
+  '-Wduplicated-branches[warn about duplicated branches in if-else statements]'
+  '-Wduplicated-cond[warn about duplicated conditions in an if-else-if chain]'
+  '-Wduplicate-decl-specifier[warn when a declaration has duplicate const, volatile, restrict or _Atomic specifier]'
+  '-Weffc\+\+[warn about violations of Effective C++ style rules]'
+  '-Wempty-body[warn about an empty body in an if or else statement]'
+  '-Wendif-labels[warn about stray tokens after #else and #endif]'
+  '-Wenum-compare[warn about comparison of different enum types]'
+  # '-Werror-implicit-function-declaration[this switch is deprecated; use -Werror=implicit-fun]' # this still exists but makes completing -Werror= less convenient
+  '-Wexpansion-to-defined[warn if "defined" is used outside #if]'
+  '-Wextra[print extra (possibly unwanted) warnings]'
+  '-Wfloat-conversion[warn for implicit type conversions that cause loss of floating point precision]'
+  '-Wfloat-equal[warn if testing floating point numbers for equality]'
+  '-Wformat-contains-nul[warn about format strings that contain NUL bytes]'
+  '-Wformat-extra-args[warn if passing too many arguments to a function for its format string]'
+  '-Wformat-nonliteral[warn about format strings that are not literals]'
+  '-Wformat-overflow[warn about function calls with format strings that write past the end of the destination region]'
+  '-Wformat-overflow=[warn about function calls with format strings that write past the end of the destination region]:level:(1 2)'
+  '-Wformat-security[warn about possible security problems with format functions]'
+  '-Wformat-signedness[warn about sign differences with format functions]'
+  '-Wformat-truncation[warn about calls to snprintf and similar functions that truncate output. Same as -Wformat- truncation=1.  Same as -Wformat-truncation=]'
+  '-Wformat-truncation=[warn about calls to snprintf and similar functions that truncate output]:level:(1 2)'
+  '-Wformat=[warn about printf/scanf/strftime/strfmon format string anomalies]::level:(1 2)'
+  '-Wformat-y2k[warn about strftime formats yielding 2-digit years]'
+  '-Wformat-zero-length[warn about zero-length formats]'
+  '-Wframe-address[warn when __builtin_frame_address or __builtin_return_address is used unsafely]'
+  '-Wframe-larger-than=[warn if a function'\''s stack frame requires more than <number> bytes]:bytes: '
+  '-Wfree-nonheap-object[warn when attempting to free a non-heap object]'
+  '-Wfunction-elimination[warn about function call elimination]'
+  '-Whsa[warn when a function cannot be expanded to HSAIL]'
+  '-Wignored-attributes[warn whenever attributes are ignored]'
+  '-Wignored-qualifiers[warn whenever type qualifiers are ignored]'
+  '-Wimplicit-fallthrough=[warn when a switch case falls through]:level:(1 2 3 4 5)'
+  '-Wimplicit-function-declaration[warn about implicit function declarations]'
+  '-Wimplicit-interface[warn about calls with implicit interface]'
+  '-Wimplicit-int[warn when a declaration does not specify a type]'
+  '-Wimplicit-procedure[warn about called procedures not explicitly declared]'
+  '-Wimplicit[warn about implicit declarations]'
+  '-Wimport[warn about imports]'
+  '-Wincompatible-pointer-types[warn when there is a conversion between pointers that have incompatible types]'
+  '-Winherited-variadic-ctor[warn about C++11 inheriting constructors when the base has a variadic constructor]'
+  '-Winit-self[warn about variables which are initialized to themselves]'
+  '-Winline[warn when an inlined function cannot be inlined]'
+  '-Wint-conversion[warn about incompatible integer to pointer and pointer to integer conversions]'
+  '-Winteger-division[warn about constant integer divisions with truncated results]'
+  '-Wint-in-bool-context[warn for suspicious integer expressions in boolean context]'
+  '-Wintrinsic-shadow[warn if a user-procedure has the same name as an intrinsic]'
+  '-Wintrinsics-std[warn on intrinsics not part of the selected standard]'
+  '-Wint-to-pointer-cast[warn when there is a cast to a pointer from an integer of a different size]'
+  '-Winvalid-memory-model[warn when an atomic memory model parameter is known to be outside the valid range]'
+  '-Winvalid-offsetof[warn about invalid uses of the "offsetof" macro]'
+  '-Winvalid-pch[warn about PCH files that are found but not used]'
+  '-Wjump-misses-init[warn when a jump misses a variable initialization]'
+  '-Wlarger-than=[warn if an object is larger than <number> bytes]:bytes: '
+  '-Wline-truncation[warn about truncated source lines]'
+  '-Wliteral-suffix[warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore]'
+  '-Wlogical-not-parentheses[warn when logical not is used on the left hand side operand of a comparison]'
+  '-Wlogical-op[warn when a logical operator is suspiciously always evaluating to true or false]'
+  '-Wlong-long[do not warn about using "long long" when -pedantic]'
+  '-Wlto-type-mismatch[during link time optimization warn about mismatched types of global declarations]'
+  '-Wmain[warn about suspicious declarations of "main"]'
+  '-Wmaybe-uninitialized[warn about maybe uninitialized automatic variables]'
+  '-Wmemset-elt-size[warn about suspicious calls to memset where the third argument contains the number of elements not multiplied by the element size]'
+  '-Wmemset-transposed-args[warn about suspicious calls to memset where the third argument is constant literal zero and the second is not]'
+  '-Wmisleading-indentation[warn when the indentation of the code does not reflect the block structure]'
+  '-Wmissing-braces[warn about possibly missing braces around initializers]'
+  '-Wmissing-declarations[warn about global functions without previous declarations]'
+  '-Wmissing-field-initializers[warn about missing fields in struct initializers]'
+  '-Wmissing-include-dirs[warn about user-specified include directories that do not exist]'
+  '-Wmissing-parameter-type[warn about function parameters declared without a type specifier in K&R-style functions]'
+  '-Wmissing-prototypes[warn about global functions without prototypes]'
+  '-Wmudflap[warn about constructs not instrumented by -fmudflap]'
+  '-Wmultichar[warn about use of multi-character character constants]'
+  '-Wmultiple-inheritance[warn on direct multiple inheritance]'
+  '-Wnamespaces[warn on namespace definition]'
+  '-Wnarrowing[warn about narrowing conversions within { } that are ill-formed in C++11]'
+  '-Wnested-externs[warn about "extern" declarations not at file scope]'
+  '-Wnoexcept-type[warn if C++1z noexcept function type will change the mangled name of a symbol]'
+  '-Wnoexcept[warn when a noexcept expression evaluates to false even though the expression can''t actually throw]'
+  '-Wnonnull-compare[warn if comparing pointer parameter with nonnull attribute with NULL]'
+  '-Wnonnull[warn about NULL being passed to argument slots marked as requiring non-NULL]'
+  '-Wnonportable-cfstrings[warn on CFStrings containing nonportable characters]'
+  '-Wnon-template-friend[warn when non-templatized friend functions are declared within a template]'
+  '-Wnon-virtual-dtor[warn about non-virtual destructors]'
+  '-Wnormalized=-[warn about non-normalised Unicode strings]:normalization:((id\:allow\ some\ non-nfc\ characters\ that\ are\ valid\ identifiers nfc\:only\ allow\ NFC nfkc\:only\ allow\ NFKC none\:allow\ any\ normalization)): '
+  '-Wnull-dereference[warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior]'
+  '-Wodr[warn about some C++ One Definition Rule violations during link time optimization]'
+  '-Wold-style-cast[warn if a C-style cast is used in a program]'
+  '-Wold-style-declaration[warn for obsolescent usage in a declaration]'
+  '-Wold-style-definition[warn if an old-style parameter definition is used]'
+  '-Wopenmp-simd[warn if a simd directive is overridden by the vectorizer cost model]'
+  '-Woverflow[warn about overflow in arithmetic expressions]'
+  '-Woverlength-strings[warn if a string is longer than the maximum portable length specified by the standard]'
+  '-Woverloaded-virtual[warn about overloaded virtual function names]'
+  '-Woverride-init-side-effects[warn about overriding initializers with side effects]'
+  '-Woverride-init[warn about overriding initializers without side effects]'
+  '-Wpacked-bitfield-compat[warn about packed bit-fields whose offset changed in GCC 4.4]'
+  '-Wpacked[warn when the packed attribute has no effect on struct layout]'
+  '-Wpadded[warn when padding is required to align structure members]'
+  '-Wparentheses[warn about possibly missing parentheses]'
+  '-Wpedantic[issue warnings needed for strict compliance to the standard]'
+  '-Wplacement-new=[warn for placement new expressions with undefined behavior]::level:(1 2)'
+  '-Wpmf-conversions[warn when converting the type of pointers to member functions]'
+  '-Wpointer-arith[warn about function pointer arithmetic]'
+  '-Wpointer-compare[warn when a pointer is compared with a zero character constant]'
+  '-Wpointer-sign[warn when a pointer differs in signedness in an assignment]'
+  '-Wpointer-to-int-cast[warn when a pointer is cast to an integer of a different size]'
+  '-Wpoison-system-directories[warn for -I and -L options using system directories if cross compiling]'
+  '-Wpragmas[warn about misuses of pragmas]'
+  '-Wproperty-assign-default[warn if a property for an Objective-C object has no assign semantics specified]'
+  '-Wprotocol[warn if inherited methods are unimplemented]'
+  '-Wpsabi[warn about psabi]'
+  '-Wrealloc-lhs-all[warn when a left-hand-side variable is reallocated]'
+  '-Wrealloc-lhs[warn when a left-hand-side array variable is reallocated]'
+  '-Wreal-q-constant[warn about real-literal-constants with '\'q\'' exponent-letter]'
+  '-Wredundant-decls[warn about multiple declarations of the same object]'
+  '-Wregister[warn about uses of register storage specifier]'
+  '-Wreorder[warn when the compiler reorders code]'
+  '-Wrestrict[warn when an argument passed to a restrict- qualified parameter aliases with another argument]'
+  '-Wreturn-local-addr[warn about returning a pointer/reference to a local or temporary variable]'
+  '-Wreturn-type[warn whenever a function'\''s return type defaults to "int" (C), or about inconsistent return types (C++)]'
+  '-Wscalar-storage-order[warn on suspicious constructs involving reverse scalar storage order]'
+  '-Wselector[warn if a selector has multiple methods]'
+  '-Wsequence-point[warn about possible violations of sequence point rules]'
+  '-Wshadow-ivar[warn if a local declaration hides an instance variable]'
+  '-Wshadow[warn when one variable shadows another.  Same as  -Wshadow=global]'
+  '-Wshift-count-negative[warn if shift count is negative]'
+  '-Wshift-count-overflow[warn if shift count >= width of type]'
+  '-Wshift-negative-value[warn if left shifting a negative value]'
+  '-Wshift-overflow[warn if left shift of a signed value overflows.  Same as -Wshift-overflow=]'
+  '-Wshift-overflow=[warn if left shift of a signed value overflows]:level:(1 2)'
+  '-Wsign-compare[warn about signed-unsigned comparisons]'
+  '-Wsign-conversion[warn for implicit type conversions between signed and unsigned integers]'
+  '-Wsign-promo[warn when overload promotes from unsigned to signed]'
+  '-Wsized-deallocation[warn about missing sized deallocation functions]'
+  '-Wsizeof-array-argument[warn when sizeof is applied on a parameter declared as an array]'
+  '-Wsizeof-pointer-memaccess[warn about suspicious length parameters to certain string functions if the argument uses sizeof]'
+  '-Wstack-protector[warn when not issuing stack smashing protection for some reason]'
+  '-Wstack-usage=[warn if stack usage might be larger than specified amount]:bytes: '
+  '-Wstrict-aliasing[warn about code which might break strict aliasing rules]'
+  '-Wstrict-aliasing=-[warn about code which might break strict aliasing rules]:level of checking (higher is more accurate):(1 2 3)'
+  '-Wstrict-null-sentinel[warn about uncasted NULL used as sentinel]'
+  '-Wstrict-overflow[warn about optimizations that assume that signed overflow is undefined]'
+  '-Wstrict-overflow=-[warn about optimizations that assume that signed overflow is undefined]:level of checking (higher finds more cases):(1 2 3 4 5)'
+  '-Wstrict-prototypes[warn about unprototyped function declarations]'
+  '-Wstrict-selector-match[warn if type signatures of candidate methods do not match exactly]'
+  '-Wstringop-overflow=[under the control of Object Size type, warn about buffer overflow in string manipulation functions like memcpy and strcpy]:level:(1 2 3 4)'
+  '-Wstringop-overflow[warn about buffer overflow in string manipulation functions like memcpy and strcpy.  Same as  -Wstringop-overflow=]'
+  '-Wsubobject-linkage[warn if a class type has a base or a field whose type uses the anonymous namespace or depends on a type with no linkage]'
   '*-Wsuggest-attribute=-[warn about functions that might be candidates for attributes]:attribute:(pure const noreturn format)'
-  '-Wsuggest-final-methods[Warn about C++ virtual methods where adding final keyword would improve code quality]'
-  '-Wsuggest-final-types[Warn about C++ polymorphic types where adding final keyword would improve code quality]'
-  '-Wsuggest-override[Suggest that the override keyword be used when the declaration of a virtual function overrides another]'
-  '-Wsurprising[Warn about "suspicious" constructs]'
-  '-Wswitch-bool[Warn about switches with boolean controlling expression]'
-  '-Wswitch-default[Warn about enumerated switches missing a "default-" statement]'
-  '-Wswitch-enum[Warn about all enumerated switches missing a specific case]'
-  '-Wswitch-unreachable[Warn about statements between switch'\''s controlling expression and the first case]'
-  '-Wswitch[Warn about enumerated switches, with no default, missing a case]'
-  '-Wsync-nand[Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used]'
-  '-Wsynth[Deprecated. This switch has no effect]'
-  '-Wsystem-headers[Do not suppress warnings from system headers]'
-  '-Wtabs[Permit nonconforming uses of the tab character]'
-  '-Wtarget-lifetime[Warn if the pointer in a pointer assignment might outlive its target]'
-  '-Wtautological-compare[Warn if a comparison always evaluates to true or false]'
-  '-Wtemplates[Warn on primary template declaration]'
-  '-Wterminate[Warn if a throw expression will always result in a call to terminate()]'
-  '-Wtraditional-conversion[Warn of prototypes causing type conversions different from what would happen in the absence of prototype]'
-  '-Wtraditional[Warn about features not present in traditional C]'
-  '-Wtrampolines[Warn whenever a trampoline is generated]'
-  '-Wtrigraphs[Warn if trigraphs are encountered that might affect the meaning of the program]'
-  '-Wtype-limits[Warn if a comparison is always true or always false due to the limited range of the data type]'
-  '-Wundeclared-selector[Warn about @selector()s without previously declared methods]'
-  '-Wundef[Warn if an undefined macro is used in an #if directive]'
-  '-Wundefined-do-loop[Warn about an invalid DO loop]'
-  '-Wunderflow[Warn about underflow of numerical constant expressions]'
-  '-Wuninitialized[Warn about uninitialized automatic variables]'
-  '-Wunknown-pragmas[Warn about unrecognized pragmas]'
-  '-Wunsafe-loop-optimizations[Warn if the loop cannot be optimized due to nontrivial assumptions]'
-  '-Wunsuffixed-float-constants[Warn about unsuffixed float constants]'
-  '-Wunused-but-set-parameter[Warn when a function parameter is only set, otherwise unused]'
-  '-Wunused-but-set-variable[Warn when a variable is only set, otherwise unused]'
-  '-Wunused-const-variable[Warn when a const variable is unused.  Same as  -Wunused-const-variable=]'
-  '-Wunused-dummy-argument[Warn about unused dummy arguments]'
-  '-Wunused-function[Warn when a function is unused]'
-  '-Wunused-label[Warn when a label is unused]'
-  '-Wunused-local-typedefs[Warn when typedefs locally defined in a function are not used]'
-  '-Wunused-macros[Warn about macros defined in the main file that are not used]'
-  '-Wunused-parameter[Warn when a function parameter is unused]'
-  '-Wunused-result[Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value]'
-  '-Wunused-value[Warn when an expression value is unused]'
-  '-Wunused-variable[Warn when a variable is unused]'
-  '-Wunused[Enable all -Wunused- warnings]'
-  '-Wuse-without-only[Warn about USE statements that have no ONLY qualifier]'
-  '-Wuseless-cast[Warn about useless casts]'
-  '-Wvarargs[Warn about questionable usage of the macros used to retrieve variable arguments]'
-  '-Wvariadic-macros[Warn about using variadic macros]'
-  '-Wvector-operation-performance[Warn when a vector operation is compiled outside the SIMD]'
-  '-Wvirtual-inheritance[Warn on direct virtual inheritance]'
-  '-Wvirtual-move-assign[Warn if a virtual base has a non-trivial move assignment operator]'
-  '-Wvla[Warn if a variable length array is used]'
-  '-Wvolatile-register-var[Warn when a register variable is declared volatile]'
-  '-Wwrite-strings[In C++, nonzero means warn about deprecated conversion from string literals to '\''char *'\''.  In C, similar warning, except that the conversion is]'
-  '-Wzero-as-null-pointer-constant[Warn when a literal '\''0'\'' is used as null pointer]'
-  '-Wzerotrip[Warn about zero-trip DO loops]'
-  '-frequire-return-statement[Functions which return values must end with return statements]'
-# --help=warnings,joined
-  '-Wabi=[Warn about things that change between the current  -fabi-version and the specified version]:: '
-  '-Waligned-new=[Warn even if '\'new\'' uses a class member allocation function]:none|global|all: '
-  '-Walloc-size-larger-than=[Warn for calls to allocation functions that attempt to allocate objects larger than the specified number of bytes]:bytes: '
-  '-Walloca-larger-than=[Warn on unbounded uses of alloca, and on bounded uses of alloca whose bound can be larger than <number> bytes]:bytes: '
-  '-Warray-bounds=[Warn if an array is accessed out of bounds]:level:(1 2)'
-  '-Wformat-overflow=[Warn about function calls with format strings that write past the end of the destination region]:level:(1 2)'
-  '-Wformat-truncation=[Warn about calls to snprintf and similar functions that truncate output]:level:(1 2)'
-  '-Wformat=[Warn about printf/scanf/strftime/strfmon format string anomalies]:level:(1 2)'
-  '-Wframe-larger-than=[Warn if a function'\''s stack frame requires more than <number> bytes]:bytes: '
-  '-Wimplicit-fallthrough=[Warn when a switch case falls through]:level:(1 2 3 4 5)'
-  '-Wlarger-than=[Warn if an object is larger than <number> bytes]:bytes: '
-  '-Wnormalized=-[Warn about non-normalised Unicode strings]:normalization:((id\:allow\ some\ non-nfc\ characters\ that\ are\ valid\ identifiers nfc\:only\ allow\ NFC nfkc\:only\ allow\ NFKC none\:allow\ any\ normalization)): '
-  '-Wplacement-new=[Warn for placement new expressions with undefined behavior]:level:(1 2)'
-  '-Wshift-overflow=[Warn if left shift of a signed value overflows]:level:(1 2)'
-  '-Wstack-usage=[Warn if stack usage might be larger than specified amount]:bytes: '
-  '-Wstrict-aliasing=-[Warn about code which might break strict aliasing rules]:level of checking (higher is more accurate):(1 2 3)'
-  '-Wstrict-overflow=-[Warn about optimizations that assume that signed overflow is undefined]:level of checking (higher finds more cases):(1 2 3 4 5)'
-  '-Wstringop-overflow=[Under the control of Object Size type, warn about buffer overflow in string manipulation functions like memcpy and strcpy]:level:(1 2 3 4)'
-  '-Wunused-const-variable=[Warn when a const variable is unused]:level:(1 2)'
-  '-Wvla-larger-than=[Warn on unbounded uses of variable-length arrays, and on bounded uses of variable-length arrays whose bound can be larger than <number> bytes]:bytes: ' 
-# -W options from --help=common,^warnings
-  '-Werror=-[Treat specified warning as error (or all if none specified)]::warning:->werror'
-  '-Wfatal-errors[Exit on the first error occurred]'
+  '-Wsuggest-final-methods[warn about C++ virtual methods where adding final keyword would improve code quality]'
+  '-Wsuggest-final-types[warn about C++ polymorphic types where adding final keyword would improve code quality]'
+  '-Wsuggest-override[suggest that the override keyword be used when the declaration of a virtual function overrides another]'
+  '-Wsurprising[warn about "suspicious" constructs]'
+  '-Wswitch-bool[warn about switches with boolean controlling expression]'
+  '-Wswitch-default[warn about enumerated switches missing a "default-" statement]'
+  '-Wswitch-enum[warn about all enumerated switches missing a specific case]'
+  '-Wswitch-unreachable[warn about statements between switch'\''s controlling expression and the first case]'
+  '-Wswitch[warn about enumerated switches, with no default, missing a case]'
+  '-Wsync-nand[warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used]'
+  '-Wsynth[deprecated. This switch has no effect]'
+  '-Wsystem-headers[do not suppress warnings from system headers]'
+  '-Wtabs[permit nonconforming uses of the tab character]'
+  '-Wtarget-lifetime[warn if the pointer in a pointer assignment might outlive its target]'
+  '-Wtautological-compare[warn if a comparison always evaluates to true or false]'
+  '-Wtemplates[warn on primary template declaration]'
+  '-Wterminate[warn if a throw expression will always result in a call to terminate()]'
+  '-W[this switch is deprecated; use -Wextra instead]'
+  '-Wtraditional-conversion[warn of prototypes causing type conversions different from what would happen in the absence of prototype]'
+  '-Wtraditional[warn about features not present in traditional C]'
+  '-Wtrampolines[warn whenever a trampoline is generated]'
+  '-Wtrigraphs[warn if trigraphs are encountered that might affect the meaning of the program]'
+  '-Wtype-limits[warn if a comparison is always true or always false due to the limited range of the data type]'
+  '-Wundeclared-selector[warn about @selector()s without previously declared methods]'
+  '-Wundefined-do-loop[warn about an invalid DO loop]'
+  '-Wundef[warn if an undefined macro is used in an #if directive]'
+  '-Wunderflow[warn about underflow of numerical constant expressions]'
+  '-Wuninitialized[warn about uninitialized automatic variables]'
+  '-Wunknown-pragmas[warn about unrecognized pragmas]'
+  '-Wunsafe-loop-optimizations[warn if the loop cannot be optimized due to nontrivial assumptions]'
+  '-Wunsuffixed-float-constants[warn about unsuffixed float constants]'
+  '-Wunused-but-set-parameter[warn when a function parameter is only set, otherwise unused]'
+  '-Wunused-but-set-variable[warn when a variable is only set, otherwise unused]'
+  '-Wunused-const-variable[warn when a const variable is unused.  Same as  -Wunused-const-variable=]'
+  '-Wunused-const-variable=[warn when a const variable is unused]:level:(1 2)'
+  '-Wunused-dummy-argument[warn about unused dummy arguments]'
+  '-Wunused[enable all -Wunused- warnings]'
+  '-Wunused-function[warn when a function is unused]'
+  '-Wunused-label[warn when a label is unused]'
+  '-Wunused-local-typedefs[warn when typedefs locally defined in a function are not used]'
+  '-Wunused-macros[warn about macros defined in the main file that are not used]'
+  '-Wunused-parameter[warn when a function parameter is unused]'
+  '-Wunused-result[warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value]'
+  '-Wunused-value[warn when an expression value is unused]'
+  '-Wunused-variable[warn when a variable is unused]'
+  '-Wuseless-cast[warn about useless casts]'
+  '-Wuse-without-only[warn about USE statements that have no ONLY qualifier]'
+  '-Wvarargs[warn about questionable usage of the macros used to retrieve variable arguments]'
+  '-Wvariadic-macros[warn about using variadic macros]'
+  '-Wvector-operation-performance[warn when a vector operation is compiled outside the SIMD]'
+  '-Wvirtual-inheritance[warn on direct virtual inheritance]'
+  '-Wvirtual-move-assign[warn if a virtual base has a non-trivial move assignment operator]'
+  '-Wvla-larger-than=[warn on unbounded uses of variable-length arrays, and on bounded uses of variable-length arrays whose bound can be larger than <number> bytes]:bytes: ' 
+  '-Wvla[warn if a variable length array is used]'
+  '-Wvolatile-register-var[warn when a register variable is declared volatile]'
+  '-Wwrite-strings[in C++, nonzero means warn about deprecated conversion from string literals to '\''char *'\''.  In C, similar warning, except that the conversion is]'
+  '-Wzero-as-null-pointer-constant[warn when a literal '\''0'\'' is used as null pointer]'
+  '-Wzerotrip[warn about zero-trip DO loops]'
 )
+
 # clang specific warnings
 if [[ "$service" = clang* ]]; then
-  args+=(
-    '-Wunreachable-code[Warn on code that will not be executed]'
-    '-Wunreachable-code-aggressive[Controls -Wunreachable-code, -Wunreachable-code-break, -Wunreachable-code-return]'
-    '-Wunreachable-code-break[Warn when break will never be executed]'
-    '-Wunreachable-code-loop-increment[Warn when loop will be executed only once]'
-    '-Wunreachable-code-return[Warn when return will not be executed]'
+  warnings+=(
+    '-Wlarge-by-value-copy=[warn on large by value copy]:argument'
+    '-Wunreachable-code-aggressive[controls -Wunreachable-code, -Wunreachable-code-break, -Wunreachable-code-return]'
+    '-Wunreachable-code-break[warn when break will never be executed]'
+    '-Wunreachable-code-loop-increment[warn when loop will be executed only once]'
+    '-Wunreachable-code-return[warn when return will not be executed]'
+    '-Wunreachable-code[warn on code that will not be executed]'
   )
 else
-  args+=(
-    '-Wunreachable-code[Does nothing. Preserved for backward compatibility]'
+  warnings+=(
+    '-Wunreachable-code[does nothing. Preserved for backward compatibility]'
   )
 fi
-# optimizers (from --help=optimizers), except for -O
-args+=(
-# --help=optimizers,^joined
-  '-faggressive-loop-optimizations[Aggressively optimize loops using language constraints]'
-  '-falign-functions[Align the start of functions]'
-  '-falign-jumps[Align labels which are only reached by jumping]'
-  '-falign-labels[Align all labels]'
-  '-falign-loops[Align the start of loops]'
-  '-fassociative-math[Allow optimization for floating-point arithmetic which may change the result of the operation due to rounding]'
-  '-fasynchronous-unwind-tables[Generate unwind tables that are exact at each instruction boundary]'
-  '-fauto-inc-dec[Generate auto-inc/dec instructions]'
-  '-fbranch-count-reg[Replace add, compare, branch with branch on count register]'
-  '-fbranch-probabilities[Use profiling information for branch probabilities]'
-  '-fbranch-target-load-optimize2[Perform branch target load optimization after prologue / epilogue threading]'
-  '-fbranch-target-load-optimize[Perform branch target load optimization before prologue / epilogue threading]'
-  '-fbtr-bb-exclusive[Restrict target load migration not to re-use registers in any basic block]'
-  '-fcaller-saves[Save registers around function calls]'
-  '-fcode-hoisting[Enable code hoisting]'
-  '-fcombine-stack-adjustments[Looks for opportunities to reduce stack adjustments and stack references]'
-  '-fcommon[Do not put uninitialized globals in the common section]'
-  '-fcompare-elim[Perform comparison elimination after register allocation has finished]'
-  '-fconserve-stack[Do not perform optimizations increasing noticeably stack usage]'
-  '-fcprop-registers[Perform a register copy-propagation optimization pass]'
-  '-fcrossjumping[Perform cross-jumping optimization]'
-  '-fcse-follow-jumps[When running CSE, follow jumps to their targets]'
-  '-fcx-fortran-rules[Complex multiplication and division follow Fortran rules]'
-  '-fcx-limited-range[Omit range reduction step when performing complex division]'
-  '-fdata-sections[Place data items into their own section]'
-  '-fdce[Use the RTL dead code elimination pass]'
-  '-fdefer-pop[Defer popping functions args from stack until later]'
-  '-fdelayed-branch[Attempt to fill delay slots of branch instructions]'
-  '-fdelete-dead-exceptions[Delete dead instructions that may throw exceptions]'
-  '-fdelete-null-pointer-checks[Delete useless null pointer checks]'
-  '-fdevirtualize-speculatively[Perform speculative devirtualization]'
-  '-fdevirtualize[Try to convert virtual calls to direct ones]'
-  '-fdse[Use the RTL dead store elimination pass]'
-  '-fearly-inlining[Perform early inlining]'
-  '-fexceptions[Enable exception handling]'
-  '-fexpensive-optimizations[Perform a number of minor, expensive optimizations]'
-  '-ffinite-math-only[Assume no NaNs or infinities are generated]'
-  '-ffloat-store[Don'\''t allocate floats and doubles in extended- precision registers]'
-  '-fforward-propagate[Perform a forward propagation pass on RTL]'
-  '-ffp-int-builtin-inexact[Allow built-in functions ceil, floor, round, trunc to raise "inexact" exceptions]'
-  '-ffunction-cse[Allow function addresses to be held in registers]'
-  '-fgcse-after-reload[Perform global common subexpression elimination after register allocation has finished]'
-  '-fgcse-las[Perform redundant load after store elimination in global common subexpression elimination]'
-  '-fgcse-lm[Perform enhanced load motion during global common subexpression elimination]'
-  '-fgcse-sm[Perform store motion after global common subexpression elimination]'
-  '-fgcse[Perform global common subexpression elimination]'
-  '-fgraphite-identity[Enable Graphite Identity transformation]'
-  '-fgraphite[Enable in and out of Graphite representation]'
-  '-fguess-branch-probability[Enable guessing of branch probabilities]'
-  '-fhoist-adjacent-loads[Enable hoisting adjacent loads to encourage generating conditional move instructions]'
-  '-fif-conversion2[Perform conversion of conditional jumps to conditional execution]'
-  '-fif-conversion[Perform conversion of conditional jumps to branchless equivalents]'
-  '-findirect-inlining[Perform indirect inlining]'
-  '-finline-atomics[Inline __atomic operations when a lock free instruction sequence is available]'
-  '-finline-functions-called-once[Integrate functions only required by their single caller]'
-  '-finline-functions[Integrate functions not declared "inline" into their callers when profitable]'
-  '-finline-small-functions[Integrate functions into their callers when code size is known not to grow]'
-  '-finline[Enable inlining of function declared "inline", disabling disables all inlining]'
-  '-fipa-bit-cp[Perform interprocedural bitwise constant propagation]'
-  '-fipa-cp-clone[Perform cloning to make Interprocedural constant propagation stronger]'
-  '-fipa-cp[Perform interprocedural constant propagation]'
-  '-fipa-icf-functions[Perform Identical Code Folding for functions]'
-  '-fipa-icf-variables[Perform Identical Code Folding for variables]'
-  '-fipa-icf[Perform Identical Code Folding for functions and read-only variables]'
-  '-fipa-profile[Perform interprocedural profile propagation]'
-  '-fipa-pta[Perform interprocedural points-to analysis]'
-  '-fipa-pure-const[Discover pure and const functions]'
-  '-fipa-ra[Use caller save register across calls if possible]'
-  '-fipa-reference[Discover readonly and non addressable static variables]'
-  '-fipa-sra[Perform interprocedural reduction of aggregates]'
-  '-fipa-vrp[Perform IPA Value Range Propagation]'
-  '-fira-hoist-pressure[Use IRA based register pressure calculation in RTL hoist optimizations]'
-  '-fira-loop-pressure[Use IRA based register pressure calculation in RTL loop optimizations]'
-  '-fira-share-save-slots[Share slots for saving different hard registers]'
-  '-fira-share-spill-slots[Share stack slots for spilled pseudo-registers]'
-  '-fisolate-erroneous-paths-attribute[Detect paths that trigger erroneous or undefined behavior due to a null value being used in a way forbidden by a returns_nonnull or]'
-  '-fisolate-erroneous-paths-dereference[Detect paths that trigger erroneous or undefined behavior due to dereferencing a null pointer.  Isolate those paths from the main]'
-  '-fivopts[Optimize induction variables on trees]'
-  '-fjump-tables[Use jump tables for sufficiently large switch statements]'
-  '-flifetime-dse[Tell DSE that the storage for a C++ object is dead when the constructor starts and when the destructor finishes]'
-  '-flive-range-shrinkage[Relief of register pressure through live range shrinkage]'
-  '-floop-nest-optimize[Enable the loop nest optimizer]'
-  '-floop-parallelize-all[Mark all loops as parallel]'
-  '-flra-remat[Do CFG-sensitive rematerialization in LRA]'
-  '-fmath-errno[Set errno after built-in math functions]'
-  '-fmerge-all-constants[Attempt to merge identical constants and constant variables]'
-  '-fmerge-constants[Attempt to merge identical constants across compilation units]'
-  '-fmodulo-sched-allow-regmoves[Perform SMS based modulo scheduling with register moves allowed]'
-  '-fmodulo-sched[Perform SMS based modulo scheduling before the first scheduling pass]'
-  '-fmove-loop-invariants[Move loop invariant computations out of loops]'
-  '-fno-threadsafe-statics[Do not generate thread-safe code for initializing local statics]'
-  '-fnon-call-exceptions[Support synchronous non-call exceptions]'
-  '-fnothrow-opt[Treat a throw() exception specification as noexcept to improve code size]'
-  '-fomit-frame-pointer[When possible do not generate stack frames]'
-  '-fopt-info[Enable all optimization info dumps on stderr]'
-  '-foptimize-sibling-calls[Optimize sibling and tail recursive calls]'
-  '-foptimize-strlen[Enable string length optimizations on trees]'
-  '-fpack-struct[Pack structure members together without holes]'
-  '-fpartial-inlining[Perform partial inlining]'
-  '-fpeel-loops[Perform loop peeling]'
-  '-fpeephole2[Enable an RTL peephole pass before sched2]'
-  '-fpeephole[Enable machine specific peephole optimizations]'
-  '-fplt[Use PLT for PIC calls (-fno-plt- load the address from GOT at call site)]'
-  '-fpredictive-commoning[Run predictive commoning optimization]'
-  '-fprefetch-loop-arrays[Generate prefetch instructions, if available, for arrays in loops]'
-  '-fprintf-return-value[Treat known sprintf return values as constants]'
-  '-freciprocal-math[Same as -fassociative-math for expressions which include division]'
-  '-freg-struct-return[Return small aggregates in registers]'
-  '-frename-registers[Perform a register renaming optimization pass]'
-  '-freorder-blocks-and-partition[Reorder basic blocks and partition into hot and cold sections]'
-  '-freorder-blocks[Reorder basic blocks to improve code placement]'
-  '-freorder-functions[Reorder functions to improve code placement]'
-  '-frerun-cse-after-loop[Add a common subexpression elimination pass after loop optimizations]'
-  '-freschedule-modulo-scheduled-loops[Enable/Disable the traditional scheduling in loops that already passed modulo scheduling]'
-  '-frounding-math[Disable optimizations that assume default FP rounding behavior]'
-  '-frtti[Generate run time type descriptor information]'
-  '-fsched-critical-path-heuristic[Enable the critical path heuristic in the scheduler]'
-  '-fsched-dep-count-heuristic[Enable the dependent count heuristic in the scheduler]'
-  '-fsched-group-heuristic[Enable the group heuristic in the scheduler]'
-  '-fsched-interblock[Enable scheduling across basic blocks]'
-  '-fsched-last-insn-heuristic[Enable the last instruction heuristic in the scheduler]'
-  '-fsched-pressure[Enable register pressure sensitive insn scheduling]'
-  '-fsched-rank-heuristic[Enable the rank heuristic in the scheduler]'
-  '-fsched-spec-insn-heuristic[Enable the speculative instruction heuristic in the scheduler]'
-  '-fsched-spec-load-dangerous[Allow speculative motion of more loads]'
-  '-fsched-spec-load[Allow speculative motion of some loads]'
-  '-fsched-spec[Allow speculative motion of non-loads]'
-  '-fsched-stalled-insns-dep[Set dependence distance checking in premature scheduling of queued insns]'
-  '-fsched-stalled-insns[Allow premature scheduling of queued insns]'
-  '-fsched2-use-superblocks[If scheduling post reload, do superblock scheduling]'
-  '-fschedule-fusion[Perform a target dependent instruction fusion optimization pass]'
-  '-fschedule-insns2[Reschedule instructions after register allocation]'
-  '-fschedule-insns[Reschedule instructions before register allocation]'
-  '-fsection-anchors[Access data in the same section from shared anchor points]'
-  '-fsel-sched-pipelining-outer-loops[Perform software pipelining of outer loops during selective scheduling]'
-  '-fsel-sched-pipelining[Perform software pipelining of inner loops during selective scheduling]'
-  '-fsel-sched-reschedule-pipelined[Reschedule pipelined regions without pipelining]'
-  '-fselective-scheduling2[Run selective scheduling after reload]'
-  '-fselective-scheduling[Schedule instructions using selective scheduling algorithm]'
-  '-fshort-enums[Use the narrowest integer type possible for enumeration types]'
-  '-fshort-wchar[Force the underlying type for "wchar_t" to be "unsigned short"]'
-  '-fshrink-wrap-separate[Shrink-wrap parts of the prologue and epilogue separately]'
-  '-fshrink-wrap[Emit function prologues only before parts of the function that need it, rather than at the top of the function]'
-  '-fsignaling-nans[Disable optimizations observable by IEEE signaling NaNs]'
-  '-fsigned-zeros[Disable floating point optimizations that ignore the IEEE signedness of zero]'
-  '-fsingle-precision-constant[Convert floating point constants to single precision constants]'
-  '-fsplit-ivs-in-unroller[Split lifetimes of induction variables when loops are unrolled]'
-  '-fsplit-loops[Perform loop splitting]'
-  '-fsplit-paths[Split paths leading to loop backedges]'
-  '-fsplit-wide-types[Split wide types into independent registers]'
-  '-fssa-backprop[Enable backward propagation of use properties at the SSA level]'
-  '-fssa-phiopt[Optimize conditional patterns using SSA PHI nodes]'
-  '-fstack-protector-all[Use a stack protection method for every function]'
-  '-fstack-protector-explicit[Use stack protection method only for functions with the stack_protect attribute]'
-  '-fstack-protector-strong[Use a smart stack protection method for certain functions]'
-  '-fstack-protector[Use propolice as a stack protection method]'
-  '-fstdarg-opt[Optimize amount of stdarg registers saved to stack at start of function]'
-  '-fstore-merging[Merge adjacent stores]'
-  '-fstrict-aliasing[Assume strict aliasing rules apply]'
-  '-fstrict-enums[Assume that values of enumeration type are always within the minimum range of that type]'
-  '-fstrict-overflow[Treat signed overflow as undefined]'
-  '-fstrict-volatile-bitfields[Force bitfield accesses to match their type width]'
-  '-fthread-jumps[Perform jump threading optimizations]'
-  '-ftracer[Perform superblock formation via tail duplication]'
-  '-ftrapping-math[Assume floating-point operations can trap]'
-  '-ftrapv[Trap for signed overflow in addition, subtraction and multiplication]'
-  '-ftree-bit-ccp[Enable SSA-BIT-CCP optimization on trees]'
-  '-ftree-builtin-call-dce[Enable conditional dead code elimination for builtin calls]'
-  '-ftree-ccp[Enable SSA-CCP optimization on trees]'
-  '-ftree-ch[Enable loop header copying on trees]'
-  '-ftree-coalesce-vars[Enable SSA coalescing of user variables]'
-  '-ftree-copy-prop[Enable copy propagation on trees]'
-  '-ftree-cselim[Transform condition stores into unconditional ones]'
-  '-ftree-dce[Enable SSA dead code elimination optimization on trees]'
-  '-ftree-dominator-opts[Enable dominator optimizations]'
-  '-ftree-dse[Enable dead store elimination]'
-  '-ftree-forwprop[Enable forward propagation on trees]'
-  '-ftree-fre[Enable Full Redundancy Elimination (FRE) on trees]'
-  '-ftree-loop-distribute-patterns[Enable loop distribution for patterns transformed into a library call]'
-  '-ftree-loop-distribution[Enable loop distribution on trees]'
-  '-ftree-loop-if-convert[Convert conditional jumps in innermost loops to branchless equivalents]'
-  '-ftree-loop-im[Enable loop invariant motion on trees]'
-  '-ftree-loop-ivcanon[Create canonical induction variables in loops]'
-  '-ftree-loop-optimize[Enable loop optimizations on tree level]'
-  '-ftree-loop-vectorize[Enable loop vectorization on trees]'
-  '-ftree-lrs[Perform live range splitting during the SSA- >normal pass]'
-  '-ftree-partial-pre[In SSA-PRE optimization on trees, enable partial- partial redundancy elimination]'
-  '-ftree-phiprop[Enable hoisting loads from conditional pointers]'
-  '-ftree-pre[Enable SSA-PRE optimization on trees]'
-  '-ftree-pta[Perform function-local points-to analysis on trees]'
-  '-ftree-reassoc[Enable reassociation on tree level]'
-  '-ftree-scev-cprop[Enable copy propagation of scalar-evolution information]'
-  '-ftree-sink[Enable SSA code sinking on trees]'
-  '-ftree-slp-vectorize[Enable basic block vectorization (SLP) on trees]'
-  '-ftree-slsr[Perform straight-line strength reduction]'
-  '-ftree-sra[Perform scalar replacement of aggregates]'
-  '-ftree-switch-conversion[Perform conversions of switch initializations]'
-  '-ftree-tail-merge[Enable tail merging on trees]'
-  '-ftree-ter[Replace temporary expressions in the SSA->normal pass]'
-  '-ftree-vectorize[Enable vectorization on trees]'
-  '-ftree-vrp[Perform Value Range Propagation on trees]'
-  '-funconstrained-commons[Assume common declarations may be overridden with ones with a larger trailing array]'
-  '-funroll-all-loops[Perform loop unrolling for all loops]'
-  '-funroll-loops[Perform loop unrolling when iteration count is known]'
-  '-funsafe-loop-optimizations[Allow loop optimizations to assume that the loops behave in normal way]'
-  '-funsafe-math-optimizations[Allow math optimizations that may violate IEEE or ISO standards]'
-  '-funswitch-loops[Perform loop unswitching]'
-  '-funwind-tables[Just generate unwind tables for exception handling]'
-  '-fvar-tracking-assignments-toggle[Toggle -fvar-tracking-assignments]'
-  '-fvar-tracking-assignments[Perform variable tracking by annotating assignments]'
-  '-fvar-tracking-uninit[Perform variable tracking and also tag variables that are uninitialized]'
-  '-fvar-tracking[Perform variable tracking]'
-  '-fvariable-expansion-in-unroller[Apply variable expansion when loops are unrolled]'
-  '-fvpt[Use expression value profiles in optimizations]'
-  '-fweb[Construct webs and split unrelated uses of single variable]'
-  '-fwhole-program[Perform whole program optimizations]'
-  '-fwrapv[Assume signed arithmetic overflow wraps around]'
-# --help=optimizers,joined
-  '-ffp-contract=[Perform floating-point expression contraction]:style:(off on fast)'
-  '-fira-algorithm=[Set the used IRA algorithm]:algorithm:(cb priority)'
-  '-fira-region=[Set regions for IRA]:region:(one all mixed)'
-  '-fpack-struct=[Set initial maximum structure member alignment]:alignment (power of 2): '
-  '-freorder-blocks-algorithm=[Set the used basic block reordering algorithm]:algorithm:(simple stc)'
-  '-fsched-stalled-insns-dep=[Set dependence distance checking in premature scheduling of queued insns]:insns:'
-  '-fsched-stalled-insns=[Set number of queued insns that can be prematurely scheduled]:insns:'
-  '-fsimd-cost-model=[Specifies the vectorization cost model for code marked with a simd directive]:model:(unlimited dynamic cheap)'
-  '-fstack-reuse=[Set stack reuse level for local variables]:level:(all named_vars none)'
-  '-ftree-parallelize-loops=[Enable automatic parallelization of loops]'
-  '-fvect-cost-model=[Specifies the cost model for vectorization]:model:(unlimited dynamic cheap)'
-
-)
 
-# More linker options, from gcc man pages
 args+=(
-  '-nostartfiles[Do not use the standard system startup files when linking]'
-  '-nodefaultlibs[Do not use the standard system libraries when linking]'
-  '-nostdlib[Do not use standard system startup files or libraries when linking]'
-  '-rdynamic[Pass the flag -export-dynamic to the ELF linker, on targets that support it]'
-  '-s[Remove all symbol table and relocation information from the executable]'
-  '-static[On systems that support dynamic linking, this prevents linking with the shared libraries]'
-  '-shared-libgcc[Force shared libgcc]'
-  '-static-libgcc[Force static libgcc]'
-  '-symbolic[Bind references to global symbols when building a shared object]'
-  '-T:linker script:_files'
+  {'*-A-','*--assert='}'[make an assertion]:define assertion:'
+  '--all-warnings[display all warnings]'
+  {-ansi,--ansi}'[same as -std=c89 or -std=c++98]'
+  '-aux-info[emit declaration information into <file>]:file:_files'
+  {'-B-','--prefix='}'[add <prefix> to the compiler'\''s search paths]:executable prefix:_files -/'
+  '-b[specify target machine to compile to]:target machine:'
+  {-CC,--comments-in-macros}'[do not discard comments, including macro expansion]'
+  {-C,--comments}'[do not discard comments during preprocess]'
+  {-c,--compile}'[compile and assemble, but do not link]'
+  {'*-D-','*--define-macro='}'[define a macro]:define macro:'
+  '-d-[dump the state of the preprocessor]:dump:->dump'
+  '--dependencies[generate Makefile dependencies]'
+  '-dumpbase[set the file basename to be used for dumps]:file:_files'
+  '-dumpdir[set the directory name to be used for dumps]:file:_files -/'
+  '-dumpmachine[display the compiler'\''s target processor]'
+  '-dumpspecs[display all of the built in spec strings]'
+  '-dumpversion[display the version of the compiler]'
+  '+e-[control how virtual function definitions are used]:virtual function definitions in classes:((0\:only\ interface 1\:generate\ code))'
+  {-e,--entry}'[specify program entry point is entry]:entry'
+  {-E,--preprocess}'[preprocess only; do not compile, assemble or link]'
+  '-fabi-version=-[use version <n> of the C++ ABI (default: 2)]:ABI version:(1 2 3 4 5 6)'
+  '-fada-spec-parent=[dump Ada specs as child units of given parent]'
+  '-faggressive-loop-optimizations[aggressively optimize loops using language constraints]'
+  '-falign-functions[align the start of functions]'
+  '-falign-jumps[align labels which are only reached by jumping]'
+  '-falign-labels[align all labels]'
+  '-falign-loops[align the start of loops]'
+  '-fallow-parameterless-variadic-functions[allow variadic functions without named parameter]'
+  '-fasm[recognize the asm keyword]'
+  '-fassociative-math[allow optimization for floating-point arithmetic which may change the result of the operation due to rounding]'
+  '-fasynchronous-unwind-tables[generate unwind tables that are exact at each instruction boundary]'
+  '-fauto-inc-dec[generate auto-inc/dec instructions]'
+  '-fbounds-check[generate code to check bounds before indexing arrays]'
+  '-fbranch-count-reg[replace add, compare, branch with branch on count register]'
+  '-fbranch-probabilities[use profiling information for branch probabilities]'
+  '-fbranch-target-load-optimize2[perform branch target load optimization after prologue / epilogue threading]'
+  '-fbranch-target-load-optimize[perform branch target load optimization before prologue / epilogue threading]'
+  '-fbtr-bb-exclusive[restrict target load migration not to re-use registers in any basic block]'
+  '-fbuilding-libgcc[specify building libgcc]'
+  '-fbuiltin[recognize builtin functions]'
+  '-fcaller-saves[save registers around function calls]'
+  '-fcall-saved--[mark <register> as being preserved across functions]:register'
+  '-fcall-used--[mark <register> as being corrupted by function calls]:register'
+  '-fcanonical-system-headers[where shorter use canonicalized paths to system headers]'
+  '-fcheck-data-deps[compare the results of several data dependence analyzers]'
+  '-fcheck-pointer-bounds[add pointer bounds checker instrumentation]'
+  '-fchkp-check-incomplete-type[generate pointer bounds check for variables with incomplete type]'
+  '-fchkp-check-read[generate checks for all read accesses to memory]'
+  '-fchkp-check-write[generate checks for all write accesses to memory]'
+  '-fchkp-first-field-has-own-bounds[forces checker to use narrowed bounds for address of the first field]'
+  '-fchkp-instrument-calls[generate bounds passing for calls]'
+  '-fchkp-instrument-marked-only[instrument only functions marked with bnd_instrument attribute]'
+  '-fchkp-narrow-bounds[control how checker handle pointers to object fields]'
+  '-fchkp-narrow-to-innermost-array[forces checker to use bounds of the innermost arrays in case of nested static array access]'
+  '-fchkp-optimize[allow checker optimizations]'
+  '-fchkp-store-bounds[generate bounds stores for pointer writes]'
+  '-fchkp-treat-zero-dynamic-size-as-infinite[with this option zero size obtained dynamically for objects with incomplete type will be treated as infinite]'
+  '-fchkp-use-fast-string-functions[allow to use *_nobnd versions of string functions]'
+  '-fchkp-use-nochk-string-functions[allow to use *_nochk versions of string functions]'
+  '-fchkp-use-static-bounds[use statically initialized variable for vars bounds instead of generating them each time it is required]'
+  '-fchkp-use-static-const-bounds[use statically initialized variable for constant bounds]'
+  '-fchkp-use-wrappers[transform instrumented builtin calls into calls to wrappers]'
+  '-fchkp-zero-input-bounds-for-main[use zero bounds for all incoming arguments in main function]'
+  '-fcilkplus[enable Cilk Plus]'
+  '-fcode-hoisting[enable code hoisting]'
+  '-fcombine-stack-adjustments[looks for opportunities to reduce stack adjustments and stack references]'
+  '-fcommon[do not put uninitialized globals in the common section]'
+  '-fcompare-debug=-[compile with and without e.g. -gtoggle, and compare the final-insns dump]:opts:' # TODO: complete gcc options here
+  '-fcompare-debug-second[run only the second compilation of -fcompare-debug]'
+  '-fcompare-elim[perform comparison elimination after register allocation has finished]'
+  '-fcond-mismatch[allow the arguments of the ? operator to have different types]'
+  '-fconserve-stack[do not perform optimizations increasing noticeably stack usage]'
+  '-fcprop-registers[perform a register copy-propagation optimization pass]'
+  '-fcrossjumping[perform cross-jumping optimization]'
+  '-fcse-follow-jumps[when running CSE, follow jumps to their targets]'
+  '-fcx-fortran-rules[complex multiplication and division follow Fortran rules]'
+  '-fcx-limited-range[omit range reduction step when performing complex division]'
+  '-fdata-sections[place data items into their own section]'
+  '-fdbg-cnt=-[,<counter>-<limit>,...) Set the debug counter limit]:counter\:limit,...: ' # TODO: gcc -fdbg-cnt-list -x c /dev/null -o /dev/null -c
+  '-fdbg-cnt-list[list all available debugging counters with their limits and counts]'
+  '-fdce[use the RTL dead code elimination pass]'
+  '-fdebug-cpp[emit debug annotations during preprocessing]'
+  '-fdebug-prefix-map=-[map one directory name to another in debug information]:/old/dir=/new/dir:->dirtodir'
+  '-fdebug-types-section[output .debug_types section when using DWARF v4 debuginfo]'
+  '-fdefer-pop[defer popping functions args from stack until later]'
+  '-fdelayed-branch[attempt to fill delay slots of branch instructions]'
+  '-fdelete-dead-exceptions[delete dead instructions that may throw exceptions]'
+  '-fdelete-null-pointer-checks[delete useless null pointer checks]'
+  '-fdevirtualize-speculatively[perform speculative devirtualization]'
+  '-fdevirtualize[try to convert virtual calls to direct ones]'
+  '-fdiagnostics-color=-[colorize diagnostics]::color:(never always auto)'
+  '-fdiagnostics-generate-patch[print fix-it hints to stderr in unified diff format]'
+  '-fdiagnostics-parseable-fixits[print fixit hints in machine-readable form]'
+  '-fdiagnostics-show-caret[show the source line with a caret indicating the column]'
+  '-fdiagnostics-show-location=-[how often to emit source location at the beginning of line-wrapped diagnostics]:source location:(once every-line)'
+  '-fdiagnostics-show-option[amend appropriate diagnostic messages with the command line option that controls them]'
+  '-fdirectives-only[preprocess directives only]'
+  '-fdollars-in-identifiers[permit $ as an identifier character]'
+  '-fdse[use the RTL dead store elimination pass]'
+  '-fdump-ada-spec-slim[write all declarations as Ada code for the given file only]'
+  '-fdump-ada-spec[write all declarations as Ada code transitively]'
+  '-fdump-final-insns=-[dump to filename the insns at the end of translation]:filename:_files'
+  '-fdump-go-spec=-[write all declarations to file as Go code]:filename:_files'
+  '-fdump-noaddr[suppress output of addresses in debugging dumps]'
+  '-fdump-passes[dump optimization passes]'
+  '-fdump-unnumbered-links[suppress output of previous and next insn numbers in debugging dumps]'
+  '-fdump-unnumbered[suppress output of instruction numbers, line number notes and addresses in debugging dumps]'
+  '-fdwarf2-cfi-asm[enable CFI tables via GAS assembler directives]'
+  '-fearly-inlining[perform early inlining]'
+  '-feliminate-dwarf2-dups[perform DWARF2 duplicate elimination]'
+  '-feliminate-unused-debug-symbols[perform unused type elimination in debug info]'
+  '-feliminate-unused-debug-types[perform unused type elimination in debug info]'
+  '-femit-class-debug-always[do not suppress C++ class debug information]'
+  '-femit-struct-debug-baseonly[aggressive reduced debug info for structs]'
+  '-femit-struct-debug-detailed=[detailed reduced debug info for structs]:spec list'
+  '-femit-struct-debug-reduced[conservative reduced debug info for structs]'
+  '-fexceptions[enable exception handling]'
+  '-fexcess-precision=-[specify handling of excess floating-point precision]:precision handling:(fast standard)'
+  '-fexec-charset=[convert all strings and character constants to character set]:character set'
+  '-fexpensive-optimizations[perform a number of minor, expensive optimizations]'
+  '-fextended-identifiers[permit universal character names in identifiers]'
+  '-ffast-math[sets -fno-math-errno, -funsafe-math-optimizations, -ffinite-math-only, -fno-rounding-math, -fno-signaling-nans and -fcx-limited-range]'
+  '-ffat-lto-objects[output lto objects containing both the intermediate language and binary output]'
+  '-ffinite-math-only[assume no NaNs or infinities are generated]'
+  '-ffixed--[mark <register> as being unavailable to the compiler]:register'
+  '-ffloat-store[don'\''t allocate floats and doubles in extended- precision registers]'
+  '-fforward-propagate[perform a forward propagation pass on RTL]'
+  '-ffp-contract=-[perform floating- point expression contraction (default: fast)]:style:(on off fast)'
+  '-ffp-contract=[perform floating-point expression contraction]:style:(off on fast)'
+  '-ffp-int-builtin-inexact[allow built-in functions ceil, floor, round, trunc to raise "inexact" exceptions]'
+  '-ffreestanding[do not assume that standard C libraries and main exist]'
+  '-ffunction-cse[allow function addresses to be held in registers]'
+  '-ffunction-sections[place each function into its own section]'
+  '-fgcse-after-reload[perform global common subexpression elimination after register allocation has finished]'
+  '-fgcse-las[perform redundant load after store elimination in global common subexpression elimination]'
+  '-fgcse-lm[perform enhanced load motion during global common subexpression elimination]'
+  '-fgcse[perform global common subexpression elimination]'
+  '-fgcse-sm[perform store motion after global common subexpression elimination]'
+  '-fgnu89-inline[use traditional GNU semantics for inline functions]'
+  '-fgnu-tm[enable support for GNU transactional memory]'
+  '-fgraphite[enable in and out of Graphite representation]'
+  '-fgraphite-identity[enable Graphite Identity transformation]'
+  '-fguess-branch-probability[enable guessing of branch probabilities]'
+  '-fhoist-adjacent-loads[enable hoisting adjacent loads to encourage generating conditional move instructions]'
+  '-fhosted[assume normal C execution environment]'
+  '-fif-conversion2[perform conversion of conditional jumps to conditional execution]'
+  '-fif-conversion[perform conversion of conditional jumps to branchless equivalents]'
+  '-findirect-inlining[perform indirect inlining]'
+  '-finhibit-size-directive[do not generate .size directives]'
+  '-finline-atomics[inline __atomic operations when a lock free instruction sequence is available]'
+  '-finline[enable inlining of function declared "inline", disabling disables all inlining]'
+  '-finline-functions-called-once[integrate functions only required by their single caller]'
+  '-finline-functions[integrate functions not declared "inline" into their callers when profitable]'
+  '-finline-limit=-[limit the size of inlined functions to <number>]:number: '
+  '-finline-small-functions[integrate functions into their callers when code size is known not to grow]'
+  '-finput-charset=[specify the default character set for source files]:character set'
+  '-finstrument-functions-exclude-file-list=-[do not instrument functions listed in files]:comma-separated file list:->commafiles'
+  '-finstrument-functions-exclude-function-list=-[do not instrument listed functions]:comma-separated list of syms: '
+  '-finstrument-functions[instrument function entry and exit with profiling calls]'
+  '-fipa-bit-cp[perform interprocedural bitwise constant propagation]'
+  '-fipa-cp-clone[perform cloning to make Interprocedural constant propagation stronger]'
+  '-fipa-cp[perform interprocedural constant propagation]'
+  '-fipa-icf-functions[perform Identical Code Folding for functions]'
+  '-fipa-icf[perform Identical Code Folding for functions and read-only variables]'
+  '-fipa-icf-variables[perform Identical Code Folding for variables]'
+  '-fipa-profile[perform interprocedural profile propagation]'
+  '-fipa-pta[perform interprocedural points-to analysis]'
+  '-fipa-pure-const[discover pure and const functions]'
+  '-fipa-ra[use caller save register across calls if possible]'
+  '-fipa-reference[discover readonly and non addressable static variables]'
+  '-fipa-sra[perform interprocedural reduction of aggregates]'
+  '-fipa-vrp[perform IPA Value Range Propagation]'
+  '-fira-algorithm=[set the used IRA algorithm]:algorithm:(cb priority)'
+  '-fira-hoist-pressure[use IRA based register pressure calculation in RTL hoist optimizations]'
+  '-fira-loop-pressure[use IRA based register pressure calculation in RTL loop optimizations]'
+  '-fira-region=-[set regions for IRA]:region:(all mixed one)'
+  '-fira-region=[set regions for IRA]:region:(one all mixed)'
+  '-fira-share-save-slots[share slots for saving different hard registers]'
+  '-fira-share-spill-slots[share stack slots for spilled pseudo-registers]'
+  '-fira-verbose=-[control IRA'\''s level of diagnostic messages]:verbosity: '
+  '-fisolate-erroneous-paths-attribute[detect paths that trigger erroneous or undefined behavior due to a null value being used in a way forbidden by a returns_nonnull or]'
+  '-fisolate-erroneous-paths-dereference[detect paths that trigger erroneous or undefined behavior due to dereferencing a null pointer.  Isolate those paths from the main]'
+  '-fivopts[optimize induction variables on trees]'
+  '-fjump-tables[use jump tables for sufficiently large switch statements]'
+  '-fkeep-inline-functions[generate code for functions even if they are fully inlined]'
+  '-fkeep-static-consts[emit static const variables even if they are not used]'
+  '-flax-vector-conversions[allow implicit conversions between vectors with differing numbers of subparts and/or differing element types]'
+  '-fleading-underscore[give external symbols a leading underscore]'
+  '-flifetime-dse[tell DSE that the storage for a C++ object is dead when the constructor starts and when the destructor finishes]'
+  '-flive-range-shrinkage[relief of register pressure through live range shrinkage]'
+  '-floop-nest-optimize[enable the loop nest optimizer]'
+  '-floop-parallelize-all[mark all loops as parallel]'
+  '-flra-remat[do CFG-sensitive rematerialization in LRA]'
+  '-flto-compression-level=-[use specified zlib compression level for IL]:compression level: '
+  '-flto-odr-type-merging[merge C++ types using One Definition Rule]'
+  '-flto-partition=-[partition symbols and vars at linktime based on object files they originate from]:partitioning algorithm:(1to1 balanced max one none)'
+  '-flto-report[report various link-time optimization statistics]'
+  '-fmath-errno[set errno after built-in math functions]'
+  '-fmax-errors=-[maximum number of errors to report]:errors: '
+  '-fmem-report[report on permanent memory allocation]'
+  '-fmem-report-wpa[report on permanent memory allocation in WPA only]'
+  '-fmerge-all-constants[attempt to merge identical constants and constant variables]'
+  '-fmerge-constants[attempt to merge identical constants across compilation units]'
+  '-fmerge-debug-strings[attempt to merge identical debug strings across compilation units]'
+  '-fmessage-length=-[limit diagnostics to <number> characters per line.  0 suppresses line-wrapping]:length: '
+  '-fmodulo-sched-allow-regmoves[perform SMS based modulo scheduling with register moves allowed]'
+  '-fmodulo-sched[perform SMS based modulo scheduling before the first scheduling pass]'
+  '-fmove-loop-invariants[move loop invariant computations out of loops]'
+  "-fms-extensions[don't warn about uses of Microsoft extensions]"
+  '-fmudflapir[this switch lacks documentation]'
+  '-fmudflap[this switch lacks documentation]'
+  '-fmudflapth[this switch lacks documentation]'
+  '-fnon-call-exceptions[support synchronous non-call exceptions]'
+  '-fno-stack-limit[do not limit the size of the stack]'
+  '-fno-threadsafe-statics[do not generate thread-safe code for initializing local statics]'
+  '-fnothrow-opt[treat a throw() exception specification as noexcept to improve code size]'
+  '-fomit-frame-pointer[when possible do not generate stack frames]'
+  '-fopenacc[enable OpenACC]'
+  '-fopenmp[enable OpenMP (implies -frecursive in Fortran)]'
+  "-fopenmp-simd[enable OpenMP's SIMD directives]"
+  '-foptimize-sibling-calls[optimize sibling and tail recursive calls]'
+  '-foptimize-strlen[enable string length optimizations on trees]'
+  '-fopt-info[enable all optimization info dumps on stderr]'
+  '-fopt-info-type=-[dump compiler optimization details]:filename:_files'
+  '-fpack-struct[pack structure members together without holes]'
+  '-fpack-struct=[set initial maximum structure member alignment]:alignment (power of 2): '
+  '-fpartial-inlining[perform partial inlining]'
+  '-fpcc-struct-return[return small aggregates in memory, not registers]'
+  '-fpch-deps[this switch lacks documentation]'
+  '-fpch-preprocess[look for and use PCH files even when preprocessing]'
+  '-fpeel-loops[perform loop peeling]'
+  '-fpeephole2[enable an RTL peephole pass before sched2]'
+  '-fpeephole[enable machine specific peephole optimizations]'
+  '-fPIC[generate position-independent code if possible (large mode)]'
+  '-fpic[generate position-independent code if possible (small mode)]'
+  '-fPIE[generate position-independent code for executables if possible (large mode)]'
+  '-fpie[generate position-independent code for executables if possible (small mode)]'
+  '-fplan9-extensions[enable Plan 9 language extensions]'
+  '-fplt[use PLT for PIC calls (-fno-plt- load the address from GOT at call site)]'
+  '-fplugin-arg--[specify argument <key>=<value> for plugin <name>]:-fplugin-arg-name-key=value: ' #TODO
+  '-fplugin=-[specify a plugin to load]:plugin: ' # TODO: complete plugins?
+  '-fpost-ipa-mem-report[report on memory allocation before interprocedural optimization]'
+  '-fpredictive-commoning[run predictive commoning optimization]'
+  '-fprefetch-loop-arrays[generate prefetch instructions, if available, for arrays in loops]'
+  '-fpre-ipa-mem-report[report on memory allocation before interprocedural optimization]'
+  '-fpreprocessed[treat the input file as already preprocessed]'
+  '-fprintf-return-value[treat known sprintf return values as constants]'
+  '-fprofile-arcs[insert arc-based program profiling code]'
+  '-fprofile-correction[enable correction of flow inconsistent profile data input]'
+  '-fprofile-dir=-[set the top-level directory for storing the profile data]:profile directory:_files -/'
+  '-fprofile[enable basic program profiling code]'
+  '-fprofile-generate[enable common options for generating profile info for profile feedback directed optimizations]'
+  '-fprofile-report[report on consistency of profile]'
+  '-fprofile-use[enable common options for performing profile feedback directed optimizations]'
+  '-fprofile-values[insert code to profile values of expressions]'
+  '-frandom-seed=-[use <string> as random seed]:seed: '
+  '-freciprocal-math[same as -fassociative-math for expressions which include division]'
+  '-frecord-gcc-switches[record gcc command line switches in the object file]'
+  '-free[turn on Redundant Extensions Elimination pass]'
+  '-freg-struct-return[return small aggregates in registers]'
+  '-frename-registers[perform a register renaming optimization pass]'
+  '-freorder-blocks-algorithm=[set the used basic block reordering algorithm]:algorithm:(simple stc)'
+  '-freorder-blocks-and-partition[reorder basic blocks and partition into hot and cold sections]'
+  '-freorder-blocks[reorder basic blocks to improve code placement]'
+  '-freorder-functions[reorder functions to improve code placement]'
+  '-frequire-return-statement[functions which return values must end with return statements]'
+  '-frerun-cse-after-loop[add a common subexpression elimination pass after loop optimizations]'
+  '-freschedule-modulo-scheduled-loops[enable/disable the traditional scheduling in loops that already passed modulo scheduling]'
+  '-frounding-math[disable optimizations that assume default FP rounding behavior]'
+  '-frtti[generate run time type descriptor information]'
+  "-fsanitize=-[enable AddressSanitizer, a memory error detector]:style:($sanitizers)"
+  '-fsched2-use-superblocks[if scheduling post reload, do superblock scheduling]'
+  '-fsched-critical-path-heuristic[enable the critical path heuristic in the scheduler]'
+  '-fsched-dep-count-heuristic[enable the dependent count heuristic in the scheduler]'
+  '-fsched-group-heuristic[enable the group heuristic in the scheduler]'
+  '-fsched-interblock[enable scheduling across basic blocks]'
+  '-fsched-last-insn-heuristic[enable the last instruction heuristic in the scheduler]'
+  '-fsched-pressure[enable register pressure sensitive insn scheduling]'
+  '-fsched-rank-heuristic[enable the rank heuristic in the scheduler]'
+  '-fsched-spec[allow speculative motion of non-loads]'
+  '-fsched-spec-insn-heuristic[enable the speculative instruction heuristic in the scheduler]'
+  '-fsched-spec-load[allow speculative motion of some loads]'
+  '-fsched-spec-load-dangerous[allow speculative motion of more loads]'
+  '-fsched-stalled-insns[allow premature scheduling of queued insns]'
+  '-fsched-stalled-insns-dep[set dependence distance checking in premature scheduling of queued insns]'
+  '-fsched-stalled-insns-dep=[set dependence distance checking in premature scheduling of queued insns]:insns:'
+  '-fsched-stalled-insns-dep=-[set dependence distance checking in premature scheduling of queued insns]:instructions: '
+  '-fsched-stalled-insns=[set number of queued insns that can be prematurely scheduled]:insns:'
+  '-fsched-stalled-insns=-[set number of queued insns that can be prematurely scheduled]:instructions: '
+  '-fschedule-fusion[perform a target dependent instruction fusion optimization pass]'
+  '-fschedule-insns2[reschedule instructions after register allocation]'
+  '-fschedule-insns[reschedule instructions before register allocation]'
+  '-fsched-verbose=-[set the verbosity level of the scheduler]:verbosity: '
+  '-fsection-anchors[access data in the same section from shared anchor points]'
+  '-fselective-scheduling2[run selective scheduling after reload]'
+  '-fselective-scheduling[schedule instructions using selective scheduling algorithm]'
+  '-fsel-sched-pipelining-outer-loops[perform software pipelining of outer loops during selective scheduling]'
+  '-fsel-sched-pipelining[perform software pipelining of inner loops during selective scheduling]'
+  '-fsel-sched-reschedule-pipelined[reschedule pipelined regions without pipelining]'
+  '-fshort-double[use the same size for double as for float]'
+  '-fshort-enums[use the narrowest integer type possible for enumeration types]'
+  '-fshort-wchar[force the underlying type for "wchar_t" to be "unsigned short"]'
+  '-fshow-column[show column numbers in diagnostics, when available]'
+  '-fshrink-wrap[emit function prologues only before parts of the function that need it, rather than at the top of the function]'
+  '-fshrink-wrap-separate[shrink-wrap parts of the prologue and epilogue separately]'
+  '-fsignaling-nans[disable optimizations observable by IEEE signaling NaNs]'
+  '-fsigned-bitfields[when signed or unsigned is not given make the bitfield signed]'
+  '-fsigned-char[make char signed by default]'
+  '-fsigned-zeros[disable floating point optimizations that ignore the IEEE signedness of zero]'
+  '-fsimd-cost-model=[specifies the vectorization cost model for code marked with a simd directive]:model:(unlimited dynamic cheap)'
+  '-fsingle-precision-constant[convert floating point constants to single precision constants]'
+  '-fsplit-ivs-in-unroller[split lifetimes of induction variables when loops are unrolled]'
+  '-fsplit-loops[perform loop splitting]'
+  '-fsplit-paths[split paths leading to loop backedges]'
+  '-fsplit-stack[generate discontiguous stack frames]'
+  '-fsplit-wide-types[split wide types into independent registers]'
+  '-fssa-backprop[enable backward propagation of use properties at the SSA level]'
+  '-fssa-phiopt[optimize conditional patterns using SSA PHI nodes]'
+  '-fstack-check=-[insert stack checking code into the program.  -fstack-check=specific if to argument given]:type:(none generic specific)'
+  '-fstack-limit-register=-[trap if the stack goes past <register>]:register: '
+  '-fstack-limit-symbol=-[trap if the stack goes past symbol <name>]:name: '
+  '-fstack-protector-all[use a stack protection method for every function]'
+  '-fstack-protector-explicit[use stack protection method only for functions with the stack_protect attribute]'
+  '-fstack-protector-strong[use a smart stack protection method for certain functions]'
+  '-fstack-protector[use propolice as a stack protection method]'
+  '-fstack-reuse=[set stack reuse level for local variables]:level:(all named_vars none)'
+  '-fstack-reuse=-[set stack reuse level for local variables]:reuse-level:(all named_vars none)'
+  '-fstack-usage[output stack usage information on a per-function basis]'
+  '-fstdarg-opt[optimize amount of stdarg registers saved to stack at start of function]'
+  '-fstore-merging[merge adjacent stores]'
+  '-fstrict-aliasing[assume strict aliasing rules apply]'
+  '-fstrict-enums[assume that values of enumeration type are always within the minimum range of that type]'
+  '-fstrict-overflow[treat signed overflow as undefined]'
+  '-fstrict-volatile-bitfields[force bitfield accesses to match their type width]'
+  '-fsync-libcalls[implement __atomic operations via libcalls to legacy __sync functions]'
+  '-fsyntax-only[check for syntax errors, then stop]'
+  '-ftabstop=[distance between tab stops for column reporting]:number'
+  '-ftest-coverage[create data files needed by "gcov"]'
+  '-fthread-jumps[perform jump threading optimizations]'
+  '-ftime-report[report the time taken by each compiler pass]'
+  '-ftls-model=-[set the default thread-local storage code generation model]:TLS model:(global-dynamic local-dynamic initial-exec local-exec)'
+  '-ftracer[perform superblock formation via tail duplication]'
+  '-ftrack-macro-expansion=[track locations of tokens coming from macro expansion and display them in error messages]::argument'
+  '-ftrapping-math[assume floating-point operations can trap]'
+  '-ftrapv[trap for signed overflow in addition, subtraction and multiplication]'
+  '-ftree-bit-ccp[enable SSA-BIT-CCP optimization on trees]'
+  '-ftree-builtin-call-dce[enable conditional dead code elimination for builtin calls]'
+  '-ftree-ccp[enable SSA-CCP optimization on trees]'
+  '-ftree-ch[enable loop header copying on trees]'
+  '-ftree-coalesce-vars[enable SSA coalescing of user variables]'
+  '-ftree-copy-prop[enable copy propagation on trees]'
+  '-ftree-cselim[transform condition stores into unconditional ones]'
+  '-ftree-dce[enable SSA dead code elimination optimization on trees]'
+  '-ftree-dominator-opts[enable dominator optimizations]'
+  '-ftree-dse[enable dead store elimination]'
+  '-ftree-forwprop[enable forward propagation on trees]'
+  '-ftree-fre[enable Full Redundancy Elimination (FRE) on trees]'
+  '-ftree-loop-distribute-patterns[enable loop distribution for patterns transformed into a library call]'
+  '-ftree-loop-distribution[enable loop distribution on trees]'
+  '-ftree-loop-if-convert[convert conditional jumps in innermost loops to branchless equivalents]'
+  '-ftree-loop-im[enable loop invariant motion on trees]'
+  '-ftree-loop-ivcanon[create canonical induction variables in loops]'
+  '-ftree-loop-linear[enable loop interchange transforms.  Same as  -floop-interchange]'
+  '-ftree-loop-optimize[enable loop optimizations on tree level]'
+  '-ftree-loop-vectorize[enable loop vectorization on trees]'
+  '-ftree-lrs[perform live range splitting during the SSA- >normal pass]'
+  '-ftree-parallelize-loops=[enable automatic parallelization of loops]'
+  '-ftree-parallelize-loops=-[enable automatic parallelization of loops]:threads: '
+  '-ftree-partial-pre[in SSA-PRE optimization on trees, enable partial- partial redundancy elimination]'
+  '-ftree-phiprop[enable hoisting loads from conditional pointers]'
+  '-ftree-pre[enable SSA-PRE optimization on trees]'
+  '-ftree-pta[perform function-local points-to analysis on trees]'
+  '-ftree-reassoc[enable reassociation on tree level]'
+  '-ftree-scev-cprop[enable copy propagation of scalar-evolution information]'
+  '-ftree-sink[enable SSA code sinking on trees]'
+  '-ftree-slp-vectorize[enable basic block vectorization (SLP) on trees]'
+  '-ftree-slsr[perform straight-line strength reduction]'
+  '-ftree-sra[perform scalar replacement of aggregates]'
+  '-ftree-switch-conversion[perform conversions of switch initializations]'
+  '-ftree-tail-merge[enable tail merging on trees]'
+  '-ftree-ter[replace temporary expressions in the SSA->normal pass]'
+  '-ftree-vectorize[enable vectorization on trees]'
+  '-ftree-vrp[perform Value Range Propagation on trees]'
+  '-funconstrained-commons[assume common declarations may be overridden with ones with a larger trailing array]'
+  '-funroll-all-loops[perform loop unrolling for all loops]'
+  '-funroll-loops[perform loop unrolling when iteration count is known]'
+  '-funsafe-loop-optimizations[allow loop optimizations to assume that the loops behave in normal way]'
+  '-funsafe-math-optimizations[allow math optimizations that may violate IEEE or ISO standards]'
+  '-funsigned-bitfields[when signed or unsigned is not given make the bitfield unsigned]'
+  '-funsigned-char[make char unsigned by default]'
+  '-funswitch-loops[perform loop unswitching]'
+  '-funwind-tables[just generate unwind tables for exception handling]'
+  '-fuse-ld=-[use the specified linker instead of the default linker]:linker:(bfd gold)'
+  '-fuse-linker-plugin[use linker plugin during link-time optimization]'
+  '-fvariable-expansion-in-unroller[apply variable expansion when loops are unrolled]'
+  '-fvar-tracking-assignments[perform variable tracking by annotating assignments]'
+  '-fvar-tracking-assignments-toggle[toggle -fvar-tracking-assignments]'
+  '-fvar-tracking[perform variable tracking]'
+  '-fvar-tracking-uninit[perform variable tracking and also tag variables that are uninitialized]'
+  '-fvect-cost-model=[specifies the cost model for vectorization]:model:(unlimited dynamic cheap)'
+  '-fverbose-asm[add extra commentary to assembler output]'
+  '-fvisibility=-[set the default symbol visibility]:visibility:(default internal hidden protected)'
+  '-fvpt[use expression value profiles in optimizations]'
+  '-fweb[construct webs and split unrelated uses of single variable]'
+  '-fwhole-program[perform whole program optimizations]'
+  '-fwide-exec-charset=[convert all wide strings and character constants to character set]:character set'
+  '-fworking-directory[generate a #line directive pointing at the current working directory]'
+  '-fwrapv[assume signed arithmetic overflow wraps around]'
+  '-fzero-initialized-in-bss[put zero initialized data in the bss section]'
+  {-g-,--debug=}'[generate debug information]::debugging information type or level:(0 1 2 3 gdb gdb0 gdb1 gdb2 gdb3 coff stabs stabs+ dwarf dwarf+ dwarf-2 dwarf-3 dwarf-4 dwarf-5 dwarf32 dwarf64 xcoff xcoff+)'
+  '-gno-pubnames[don'\''t generate DWARF pubnames and pubtypes sections]'
+  '-gno-record-gcc-switches[don'\''t record gcc command line switches in DWARF DW_AT_producer]'
+  '-gno-split-dwarf[don'\''t generate debug information in separate .dwo files]'
+  '-gno-strict-dwarf[emit DWARF additions beyond selected version]'
+  '-gpubnames[generate DWARF pubnames and pubtypes sections]'
+  '-grecord-gcc-switches[record gcc command line switches in DWARF DW_AT_producer]'
+  '-gsplit-dwarf[generate debug information in separate .dwo files]'
+  '-gstrict-dwarf[don'\''t emit DWARF additions beyond selected version]'
+  '-gtoggle[toggle debug information generation]'
+  '-gvms[generate debug information in VMS format]'
+  '--help[display this information]'
+  {-H,--trace-includes}'[print name of each header file used]'
+  {'*-idirafter','*--include-directory-after='}'[add directory after include search path]:second include path directory:_files -/'
+  {'*-I-','*--include-directory='}'[add directory to include search path]:header file search path:_files -/'
+  {'*-imacros','*--imacros='}'[include macros from file before parsing]:macro input file:_files -g \*.h\(-.\)'
+  '-imultiarch[set <dir> to be the multiarch include subdirectory]:directory:_files -/' #XXX not in manpage
+  '-imultilib=[set dir to be the multilib include subdirectory]:dir:_files -/'
+  '--include-barrier[restrict all prior -I flags to double-quoted inclusion and remove current directory from include path]'
+  {'*-include=','*--include='}'[include file before parsing]:include file:_files -g \*.h\(-.\)'
+  '-iplugindir=-[set <dir> to be the default plugin directory]:directory:_files -/'
+  {'*-iprefix','*--include-prefix='}'[set the -iwithprefix prefix]:prefix:_files'
+  '-iquote=[add dir to the end of the quote include path]:dir:_files -/'
+  '-isysroot=[set dir to be the system root directory]:dir:_files -/'
+  '*-isystem[add directory to system include search path]:second include path directory (system):_files -/'
+  {'*-iwithprefixbefore','*--include-with-prefix-before='}'[set directory to include search path with prefix]:main include path directory:_files -/'
+  {'*-iwithprefix','*--include-with-prefix=','*--include-with-prefix-after='}'[set directory to system include search path with prefix]:second include path directory:_files -/'
+  '*-L-[add directory to library search path]:library search path:_files -/'
+  '-lang-asm[set lang asm]'
+  '*-l+[include library found in search path]:library:->library'
+  '-MF[write dependency output to the given file]:file:_files'
+  '-MJ[write a compilation database entry per input]'
+  '-MQ[add a make-quoted target]:target'
+  '*-M-[set flags for generating Makefile dependencies]::output dependencies:->dependencies'
+  '-MT[add an unquoted target]:target'
+  '-no-canonical-prefixes[do not canonicalize paths when building relative prefixes to other gcc components]'
+  '-nodefaultlibs[do not use the standard system libraries when linking]'
+  '-nostartfiles[do not use the standard system startup files when linking]'
+  {-nostdinc,--no-standard-includes}'[do not search standard system directories or compiler builtin directories for include files]'
+  '-nostdlib[do not use standard system startup files or libraries when linking]'
+  {-O-,--optimize=-}'[control the optimization]::optimization level:((0 1 2 3 g\:optimize\ for\ debugging\ experience s\:optimize\ for\ space fast\:optimize\ for\ speed\ disregarding\ exact\ standards\ compliance))'
+  {-o,--output=}'[write output to file]:output file:_files -g "^*.(c|h|cc|C|cxx|cpp|hpp)(-.)"'
+  '--output-pch=[output pch]'
+  '--param[set parameter <param> to value.  See manpage for a complete list of parameters]:name=value'
+  '-pass-exit-codes[exit with highest error code from a phase]'
+  {-pedantic-errors,--pedantic-errors}'[like -pedantic but issue them as errors]'
+  {-pedantic,--pedantic}'[issue all mandatory diagnostics in the C standard]'
+  '(-pg)-p[enable function profiling for prof]'
+  '-pie[create a position independent executable]'
+  {-pipe,--pipe}'[use pipes rather than intermediate files]'
+  {-P,--no-line-commands}'[inhibit generation of linkemakers during preprocess]'
+  '(-p)-pg[enable function profiling for gprof]'
+  '-###[print commands to run this compilation]'
+  '-print-file-name=-[display the full path to library <library>]:library:->library'
+  '-print-libgcc-file-name[display the name of the compiler'\''s companion library]'
+  '--print-missing-file-dependencies[print missing file dependencies]'
+  '-print-multiarch[display the target'\''s normalized GNU triplet, used as a component in the library path]'
+  '-print-multi-directory[display the root directory for versions of libgcc]'
+  '-print-multi-lib[display the mapping between command line options and multiple library search directories]'
+  '-print-multi-os-directory[display the relative path to OS libraries]'
+  '-print-prog-name=-[display the full path to compiler component <program>]:program:'
+  '-print-search-dirs[display the directories in the compiler'\''s search path]'
+  '-print-sysroot[display the target libraries directory]'
+  '-print-sysroot-headers-suffix[display the sysroot suffix used to find headers]'
+  {-Qn,-fno-ident}'[do not emit metadata containing compiler name and version]'
+  '-quiet[do not display functions compiled or elapsed time]'
+  {-Qy,-fident}'[emit metadata containing compiler name and version]'
+  '-rdynamic[pass the flag -export-dynamic to the ELF linker, on targets that support it]'
+  '-remap[remap file names when including files]'
+  {-S,--assemble}'[compile only; do not assemble or link]'
+  '-save-stats=-[save code generation statistics]:location:(cwd obj)'
+  '-save-temps[do not delete intermediate files]'
+  '-shared[create a shared library]'
+  '-shared-libgcc[force shared libgcc]'
+  '*-specs=-[override built-in specs with the contents of <file>]:file:_files'
+  '-s[remove all symbol table and relocation information from the executable]'
+  '-static-libgcc[force static libgcc]'
+  '-static[on systems that support dynamic linking, this prevents linking with the shared libraries]'
+  {'-std=-','--std='}'[assume that the input sources are for specified standard]:standard:(c90 c89 iso9899\:1990 iso9899\:199409 c99 iso9899\:1999 c11 iso9899\:2011 gnu90 gnu89 gnu99 gnu11 c++98 c++03 gnu++98 gnu++03 c++11 gnu++11 c++1y gnu++1y c++14 gnu++14 c++1z gnu++1z c++17 iso9899\:2017 gnu++17 c++2a gnu++2a)'
+  '-symbolic[bind references to global symbols when building a shared object]'
+  '--sysroot=-[use <directory> as the root directory for headers and libraries]:directory:_files -/'
+  '--target-help[display target specific command line options]'
+  '-time[time the execution of each subprocess]'
+  {-traditional-cpp,--traditional-cpp}'[use traditional preprocessor]'
+  {-trigraphs,--trigraphs}'[process trigraph sequences]'
+  '-T[specify linker script]:linker script:_files'
+  '-undef[do not predefine system specific and gcc specific macros]'
+  '*-u[pretend symbol to be undefined]:symbol:'
+  '--user-dependencies[print user dependencies]'
+  {'*-U-','*--undefine-macro='}'[undefine a macro]:undefine macro:'
+  '-version[display the compiler'\''s version]'
+  '--version[display version information]'
+  '-V[specify compiler version]:compiler version:'
+  {-v,--verbose}'[enable verbose output]'
+  '*-Wa,-[pass arguments to the assembler]:assembler option:'
+  '--warn--[enable the specified warning]:warning:->warning'
+  '*-Werror=-[treat specified warning as error (or all if none specified)]::warning:->warning'
+  '-Wfatal-errors[exit on the first error occurred]'
+  '*-Wl,-[pass arguments to the linker]:linker option:'
+  {-w,--no-warnings}'[suppress warnings]'
+  '*-Wp,-[pass arguments to the preprocessor]:preprocessor option:'
+  '--write-dependencies[write a depfile containing user and system dependencies]'
+  '--write-user-dependencies[write a depfile containing user dependencies]'
+  '*-Xassembler[pass argument to the assembler]:assembler option:'
+  '*-Xlinker[pass argument to the linker]:linker option:'
+  '*-Xpreprocessor[pass argument to the preprocessor]:preprocessor option:'
+  '-x[specify the language of the following input files]:input file language:('"$languages"')'
 )
 
-# other common options, gcc --help=warnings --help=optimizers --help=common|sed 1,/language-independent/d
-args+=(
-# | grep -v ::
-  '--help[Display this information]'
-  '--no-warnings[Same as -w]'
-  '--optimize[Same as -O]'
-  '--output:output file:_files -g "^*.(c|h|cc|C|cxx|cpp|hpp)(-.)"'
-  '--param[Set parameter <param> to value.  See manpage for a complete list of parameters]:name=value'
-  '--verbose[Same as -v]'
-  '--version[Display version information]'
-  '-aux-info[Emit declaration information into <file>]:file:_files'
-  '-dumpbase[Set the file basename to be used for dumps]:file:_files'
-  '-dumpdir[Set the directory name to be used for dumps]:file:_files -/'
-  '-fPIC[Generate position-independent code if possible (large mode)]'
-  '-fPIE[Generate position-independent code for executables if possible (large mode)]'
-  '-fassociative-math[Allow optimization for floating-point arithmetic which may change the result of the operation due to rounding]'
-  '-fauto-inc-dec[Generate auto-inc/dec instructions]'
-  '-fbounds-check[Generate code to check bounds before indexing arrays]'
-  '-fcall-saved--[Mark <register> as being preserved across functions]:register'
-  '-fcall-used--[Mark <register> as being corrupted by function calls]:register'
-  '-fcheck-data-deps[Compare the results of several data dependence analyzers]'
-  '-fcompare-debug-second[Run only the second compilation of -fcompare-debug]'
-  '-fcompare-debug=-[Compile with and without e.g. -gtoggle, and compare the final-insns dump]:opts:' #TODO: complete gcc options here
-  '-fdbg-cnt-list[List all available debugging counters with their limits and counts]'
-  '-fdbg-cnt=-[,<counter>-<limit>,...) Set the debug counter limit]:counter\:limit,...: ' #TODO: gcc -fdbg-cnt-list -x c /dev/null -o /dev/null -c
-  '-fdebug-types-section[Output .debug_types section when using DWARF v4 debuginfo]'
-  '-fdelete-dead-exceptions[Delete dead instructions that may throw exceptions]'
-  '-fdiagnostics-color=-[Colorize diagnostics]::color:(never always auto)'
-  '-fdiagnostics-generate-patch[Print fix-it hints to stderr in unified diff format]'
-  '-fdiagnostics-parseable-fixits[Print fixit hints in machine-readable form]'
-  '-fdiagnostics-show-caret[Show the source line with a caret indicating the column]'
-  '-fdiagnostics-show-location=-[How often to emit source location at the beginning of line-wrapped diagnostics]:source location:(once every-line)'
-  '-fdiagnostics-show-option[Amend appropriate diagnostic messages with the command line option that controls them]'
-  #not meant for end users
-  #'-fdisable--pass=-[disables an optimization pass]:range1+range2: '
-  #'-fdisable-[disables an optimization pass]'
-  #'-fenable--pass=-[enables an optimization pass]:range1+range2: '
-  #'-fenable-[enables an optimization pass]'
-  #'-fdump-<type>[Dump various compiler internals to a file]'
-  '-fdump-final-insns=-[Dump to filename the insns at the end of translation]:filename:_files'
-  '-fdump-go-spec=-[Write all declarations to file as Go code]:filename:_files'
-  '-fdump-noaddr[Suppress output of addresses in debugging dumps]'
-  '-fdump-passes[Dump optimization passes]'
-  '-fdump-unnumbered-links[Suppress output of previous and next insn numbers in debugging dumps]'
-  '-fdump-unnumbered[Suppress output of instruction numbers, line number notes and addresses in debugging dumps]'
-  '-fdwarf2-cfi-asm[Enable CFI tables via GAS assembler directives]'
-  '-feliminate-dwarf2-dups[Perform DWARF2 duplicate elimination]'
-  '-feliminate-unused-debug-symbols[Perform unused type elimination in debug info]'
-  '-feliminate-unused-debug-types[Perform unused type elimination in debug info]'
-  '-femit-class-debug-always[Do not suppress C++ class debug information]'
-  '-fexcess-precision=-[Specify handling of excess floating-point precision]:precision handling:(fast standard)'
-  '-ffast-math[Sets -fno-math-errno, -funsafe-math-optimizations, -ffinite-math-only, -fno-rounding-math, -fno-signaling-nans and -fcx-limited-range]'
-  '-ffat-lto-objects[Output lto objects containing both the intermediate language and binary output]'
-  '-ffixed--[Mark <register> as being unavailable to the compiler]:register'
-  '-ffunction-cse[Allow function addresses to be held in registers]'
-  '-ffunction-sections[Place each function into its own section]'
-  '-fgnu-tm[Enable support for GNU transactional memory]'
-  '-fgraphite[Enable in and out of Graphite representation]'
-  '-fident[Process #ident directives]'
-  '-findirect-inlining[Perform indirect inlining]'
-  '-finhibit-size-directive[Do not generate .size directives]'
-  '-finline-limit=-[Limit the size of inlined functions to <number>]:number: '
-  '-finstrument-functions[Instrument function entry and exit with profiling calls]'
-  '-fira-loop-pressure[Use IRA based register pressure calculation in RTL loop optimizations]'
-  '-fira-share-save-slots[Share slots for saving different hard registers]'
-  '-fira-share-spill-slots[Share stack slots for spilled pseudo-registers]'
-  '-fira-verbose=-[Control IRA'\''s level of diagnostic messages]:verbosity: '
-  '-fkeep-inline-functions[Generate code for functions even if they are fully inlined]'
-  '-fkeep-static-consts[Emit static const variables even if they are not used]'
-  '-fleading-underscore[Give external symbols a leading underscore]'
-  '-flto-compression-level=-[Use specified zlib compression level for IL]:compression level: '
-  '-flto-odr-type-merging[Merge C++ types using One Definition Rule]'
-  '-flto-partition=-[Partition symbols and vars at linktime based on object files they originate from]:partitioning algorithm:(1to1 balanced max one none)'
-  '-flto-report[Report various link-time optimization statistics]'
-  '-fmax-errors=-[Maximum number of errors to report]:errors: '
-  '-fmem-report-wpa[Report on permanent memory allocation in WPA only]'
-  '-fmem-report[Report on permanent memory allocation]'
-  '-fmerge-debug-strings[Attempt to merge identical debug strings across compilation units]'
-  '-fmessage-length=-[Limit diagnostics to <number> characters per line.  0 suppresses line-wrapping]:length: '
-  '-fmodulo-sched-allow-regmoves[Perform SMS based modulo scheduling with register moves allowed]'
-  '-fopt-info-type=-[Dump compiler optimization details]:filename:_files'
-  '-fopt-info[Dump compiler optimization details]'
-  '-fpartial-inlining[Perform partial inlining]'
-  '-fpcc-struct-return[Return small aggregates in memory, not registers]'
-  '-fpic[Generate position-independent code if possible (small mode)]'
-  '-fpie[Generate position-independent code for executables if possible (small mode)]'
-  '-fplugin-arg--[Specify argument <key>=<value> for plugin <name>]:-fplugin-arg-name-key=value: ' #TODO
-  '-fpost-ipa-mem-report[Report on memory allocation before interprocedural optimization]'
-  '-fpre-ipa-mem-report[Report on memory allocation before interprocedural optimization]'
-  '-fprofile-arcs[Insert arc-based program profiling code]'
-  '-fprofile-correction[Enable correction of flow inconsistent profile data input]'
-  '-fprofile-generate[Enable common options for generating profile info for profile feedback directed optimizations]'
-  '-fprofile-report[Report on consistency of profile]'
-  '-fprofile-use[Enable common options for performing profile feedback directed optimizations]'
-  '-fprofile-values[Insert code to profile values of expressions]'
-  '-fprofile[Enable basic program profiling code]'
-  '-frandom-seed=-[Use <string> as random seed]:seed: '
-  '-freciprocal-math[Same as -fassociative-math for expressions which include division]'
-  '-frecord-gcc-switches[Record gcc command line switches in the object file]'
-  '-free[Turn on Redundant Extensions Elimination pass]'
-  "-fsanitize=-[Enable AddressSanitizer, a memory error detector]:style:($sanitizers)"
-  '-fsched-stalled-insns-dep=-[Set dependence distance checking in premature scheduling of queued insns]:instructions: '
-  '-fsched-stalled-insns=-[Set number of queued insns that can be prematurely scheduled]:instructions: '
-  '-fsched-verbose=-[Set the verbosity level of the scheduler]:verbosity: '
-  '-fshow-column[Show column numbers in diagnostics, when available]'
-  '-fsplit-stack[Generate discontiguous stack frames]'
-  '-fstack-check=-[Insert stack checking code into the program.  -fstack-check=specific if to argument given]:type:(none generic specific)'
-  '-fstack-limit-register=-[Trap if the stack goes past <register>]:register: '
-  '-fstack-limit-symbol=-[Trap if the stack goes past symbol <name>]:name: '
-  '-fno-stack-limit'
-  '-fstack-protector-all[Use a stack protection method for every function]'
-  '-fstack-protector[Use propolice as a stack protection method]'
-  '-fstack-usage[Output stack usage information on a per-function basis]'
-  '-fstrict-overflow[Treat signed overflow as undefined]'
-  '-fstrict-volatile-bitfields[Force bitfield accesses to match their type width]'
-  '-fsync-libcalls[Implement __atomic operations via libcalls to legacy __sync functions]'
-  '-fsyntax-only[Check for syntax errors, then stop]'
-  '-ftest-coverage[Create data files needed by "gcov"]'
-  '-ftime-report[Report the time taken by each compiler pass]'
-  '-ftls-model=-[Set the default thread-local storage code generation model]:TLS model:(global-dynamic local-dynamic initial-exec local-exec)'
-  '-ftracer[Perform superblock formation via tail duplication]'
-  '-ftree-loop-linear[Enable loop interchange transforms.  Same as  -floop-interchange]'
-  '-fuse-ld=-[Use the specified linker instead of the default linker]:linker:(bfd gold)'
-  '-fuse-linker-plugin[Use linker plugin during link-time optimization]'
-  '-fverbose-asm[Add extra commentary to assembler output]'
-  '-fvisibility=-[Set the default symbol visibility]:visibility:(default internal hidden protected)'
-  '-fzero-initialized-in-bss[Put zero initialized data in the bss section]'
-  '-gno-pubnames[Don'\''t generate DWARF pubnames and pubtypes sections]'
-  '-gno-record-gcc-switches[Don'\''t record gcc command line switches in DWARF DW_AT_producer]'
-  '-gno-split-dwarf[Don'\''t generate debug information in separate .dwo files]'
-  '-gno-strict-dwarf[Emit DWARF additions beyond selected version]'
-  '-gpubnames[Generate DWARF pubnames and pubtypes sections]'
-  '-grecord-gcc-switches[Record gcc command line switches in DWARF DW_AT_producer]'
-  '-gsplit-dwarf[Generate debug information in separate .dwo files]'
-  '-gstrict-dwarf[Don'\''t emit DWARF additions beyond selected version]'
-  '-gtoggle[Toggle debug information generation]'
-  '-gvms[Generate debug information in VMS format]'
-  '-imultiarch[Set <dir> to be the multiarch include subdirectory]:directory:_files -/' #XXX not in manpage
-  '-iplugindir=-[Set <dir> to be the default plugin directory]:directory:_files -/'
-  '(-pg)-p[Enable function profiling for prof]'
-  '(-p)-pg[Enable function profiling for gprof]'
-  '-pedantic-errors[Like -pedantic but issue them as errors]'
-  '-pedantic[Issue all mandatory diagnostics in the C standard]'
-  '-quiet[Do not display functions compiled or elapsed time]'
-  '-v[Enable verbose output]'
-  '-version[Display the compiler'\''s version]'
-  '-w[Suppress warnings]'
-# | grep ::
-  '-fabi-version=-[Use version <n> of the C++ ABI (default: 2)]:ABI version:(1 2 3 4 5 6)'
-  '-fdebug-prefix-map=-[Map one directory name to another in debug information]:/old/dir=/new/dir:->dirtodir'
-  '-ffp-contract=-[Perform floating- point expression contraction (default: fast)]:style:(on off fast)'
-  '-finstrument-functions-exclude-file-list=-[Do not instrument functions listed in files]:comma-separated file list:->commafiles'
-  '-finstrument-functions-exclude-function-list=-[Do not instrument listed functions]:comma-separated list of syms: '
-  '-fira-algorithm=-[Set the used IRA algorithm]:algorithm:(priority CB)'
-  '-fira-region=-[Set regions for IRA]:region:(all mixed one)'
-  '-fplugin=-[Specify a plugin to load]:plugin: ' # TODO: complete plugins?
-  '-fprofile-dir=-[Set the top-level directory for storing the profile data]:profile directory:_files -/'
-  '-fstack-reuse=-[Set stack reuse level for local variables]:reuse-level:(all named_vars none)'
-  '-ftree-parallelize-loops=-[Enable automatic parallelization of loops]:threads: '
-)
+# not meant for end users
+#'-fdisable--pass=-[disables an optimization pass]:range1+range2: '
+#'-fdisable-[disables an optimization pass]'
+#'-fenable--pass=-[enables an optimization pass]:range1+range2: '
+#'-fenable-[enables an optimization pass]'
+#'-fdump-<type>[dump various compiler internals to a file]'
+
+args+=($warnings)
 
 # How to mostly autogenerate the above stuff:
 # joinhelplines() { sed '$!N;s/^\(  -.*\)\n  \s*\([^-]\)/\1 \2/;P;D' }
 # gcc-x86() { gcc --help=target,\^undocumented | joinhelplines | joinhelplines }
 # compdef _gnu_generic gcc-x86
 # printf '%s\n' ${(onq-)_args_cache_gcc_x86}
+
+# TODO: -fno-<TAB> and -mno-<TAB> match lots of non-existent options.
 _arguments -C -M 'L:|-{fWm}no-=-{fWm} r:|[_-]=* r:|=*' \
   "$args[@]" \
   "$args2[@]" && ret=0
 
-
 case "$state" in
 dump)
-  _values -s '' 'dump information' \
-    'M[only macro definitions]' \
-    'N[macro names]' \
-    'D[macro definitions and normal output]' \
-    'y[debugging information during parsing]' \
-    'r[after RTL generation]' \
-    'x[only generate RTL]' \
-    'j[after jump optimization]' \
-    's[after CSE]' \
-    'L[after loop optimization]' \
-    't[after second CSE pass]' \
-    'f[after flow analysis]' \
-    'c[after instruction combination]' \
-    'S[after first instruction scheduling pass]' \
-    'l[after local register allocation]' \
-    'g[after global register allocation]' \
-    'R[after second instruction scheduling pass]' \
-    'J[after last jump optimization]' \
-    'd[after delayed branch scheduling]' \
-    'k[after conversion from registers to stack]' \
-    'a[all dumps]' \
-    'm[print memory usage statistics]' \
-    'p[annotate assembler output]' && ret=0
+  local -a dump_values=(
+    'A[verbose assembly output]'
+    'D[macro definitions and normal output]'
+    'I[include directives and normal output]'
+    'J[after last jump optimization]'
+    'L[after loop optimization]'
+    'M[only macro definitions]'
+    'N[macro names]'
+    'R[after second instruction scheduling pass]'
+    'S[after first instruction scheduling pass]'
+    'a[all dumps]'
+    'c[after instruction combination]'
+    'd[after delayed branch scheduling]'
+    'f[after flow analysis]'
+    'g[after global register allocation]'
+    'j[after jump optimization]'
+    'k[after conversion from registers to stack]'
+    'l[after local register allocation]'
+    'm[print memory usage statistics]'
+    'p[annotate assembler output]'
+    'r[after RTL generation]'
+    's[after CSE]'
+    't[after second CSE pass]'
+    'x[only generate RTL]'
+    'y[debugging information during parsing]'
+  )
+  _values -s '' 'dump information' $dump_values && ret=0
+  ;;
+dependencies)
+  local -a dependencies=(
+    'D:generate make dependencies and compile'
+    'G:treat missing header files as generated'
+    'M:only user header files'
+    'MD:output to file'
+    'P:generate phony targets for all headers'
+    'V:use NMake/Jom format for the depfile'
+  )
+  _describe dependencies dependencies && ret=0
   ;;
 library)
+  # TODO: improve defaults for library_path (e.g., use output of clang -Wl,-v)
+  local -a library_path=( /usr/lib /usr/local/lib )
+  case $OSTYPE in
+    (darwin*)
+      library_path+=( $(xcrun --show-sdk-path)/usr/lib )
+      ;;
+    (linux-gnu)
+      local tmp
+      tmp=$(_call_program library-paths $words[1] -print-multiarch)
+      if [[ $tmp != '' && -d /usr/lib/$tmp ]]; then
+	library_path+=( /usr/lib/$tmp )
+      elif [[ -d /usr/lib64 ]]; then
+	library_path+=( /usr/lib64 )
+      fi
+      ;;
+  esac
+  # Add directories from -L options
+  for ((i = 2; i < $#words; i++)); do
+    if [[ "$words[i]" = -L ]]; then
+      library_path+=("$words[++i]")
+    elif [[ "$words[i]" = -L* ]]; then
+      library_path+=("${words[i]##-L}")
+    fi
+  done
   _wanted libraries expl library \
-      compadd - ${^=LD_LIBRARY_PATH:-/usr/lib /usr/local/lib}/lib*.(a|so*)(:t:fr:s/lib//) && ret=0
+      compadd - $library_path/lib*.(a|so*|dylib)(:t:fr:s/lib//) && ret=0
   ;;
 rundir)
   compset -P '*:'
@@ -1219,7 +2250,39 @@ commafiles)
   compset -P '*,'
   _files && ret=0
   ;;
+framework)
+  local -a framework_path=()
+  case $OSTYPE in
+    darwin*)
+      framework_path=( $(xcrun --show-sdk-path)/System/Library/Frameworks ) ;;
+  esac
+  # Add directories from -F options
+  for ((i = 2; i < $#words; i++)); do
+    if [[ "$words[i]" = -F ]]; then
+      framework_path+=("$words[++i]")
+    elif [[ "$words[i]" = -F* ]]; then
+      framework_path+=("${words[i]##-F}")
+    fi
+  done
+  _wanted frameworks expl framework \
+      compadd -- $framework_path/*.framework(:t:r) && ret=0
+  ;;
+warning)
+  local -a warning_names
+  for warning in $warnings; do
+    if [[ "$warning" = (#b)-W([^=\[]##)[^\[]#\[(*)\]* ]]; then
+      warning_names+=("$match[1]:$match[2]")
+    fi
+  done
+  _describe warning warning_names && ret=0
+  ;;
+arch)
+  _wanted cputypes expl "CPU type" compadd -a arch && ret=0
+  ;;
+archgeneric)
+  arch+=(generic)
+  _wanted cputypes expl "CPU type" compadd -a arch && ret=0
+  ;;
 esac
 
 return ret
-