Next: , Up: Invoking GCC


3.1 Option Summary

Here is a summary of all the options, grouped by type. Explanations are in the following sections.

Overall Options
See Options Controlling the Kind of Output.
          -c  -S  -E  -o file  -x language  
          -v  -###  --help[=class[,...]]  --target-help  --version 
          -pass-exit-codes  -pipe  -specs=file  -wrapper  
          @file  -fplugin=file  -fplugin-arg-name=arg  
          -fdump-ada-spec[-slim]  -fada-spec-parent=unit  -fdump-go-spec=file

C Language Options
See Options Controlling C Dialect.
          -ansi  -std=standard  -fgnu89-inline 
          -fpermitted-flt-eval-methods=standard 
          -aux-info filename  -fallow-parameterless-variadic-functions 
          -fno-asm  -fno-builtin  -fno-builtin-function  -fgimple
          -fhosted  -ffreestanding  -fopenacc  -fopenmp  -fopenmp-simd 
          -fms-extensions  -fplan9-extensions  -fsso-struct=endianness 
          -fallow-single-precision  -fcond-mismatch  -flax-vector-conversions 
          -fsigned-bitfields  -fsigned-char 
          -funsigned-bitfields  -funsigned-char

C++ Language Options
See Options Controlling C++ Dialect.
          -fabi-version=n  -fno-access-control 
          -faligned-new=n  -fargs-in-order=n  -fcheck-new 
          -fconstexpr-depth=n  -fconstexpr-loop-limit=n 
          -ffriend-injection 
          -fno-elide-constructors 
          -fno-enforce-eh-specs 
          -ffor-scope  -fno-for-scope  -fno-gnu-keywords 
          -fno-implicit-templates 
          -fno-implicit-inline-templates 
          -fno-implement-inlines  -fms-extensions 
          -fnew-inheriting-ctors 
          -fnew-ttp-matching 
          -fno-nonansi-builtins  -fnothrow-opt  -fno-operator-names 
          -fno-optional-diags  -fpermissive 
          -fno-pretty-templates 
          -frepo  -fno-rtti  -fsized-deallocation 
          -ftemplate-backtrace-limit=n 
          -ftemplate-depth=n 
          -fno-threadsafe-statics  -fuse-cxa-atexit 
          -fno-weak  -nostdinc++ 
          -fvisibility-inlines-hidden 
          -fvisibility-ms-compat 
          -fext-numeric-literals 
          -Wabi=n  -Wabi-tag  -Wconversion-null  -Wctor-dtor-privacy 
          -Wdelete-non-virtual-dtor  -Wliteral-suffix  -Wmultiple-inheritance 
          -Wnamespaces  -Wnarrowing 
          -Wnoexcept  -Wnon-virtual-dtor  -Wreorder  -Wregister 
          -Weffc++  -Wstrict-null-sentinel  -Wtemplates 
          -Wno-non-template-friend  -Wold-style-cast 
          -Woverloaded-virtual  -Wno-pmf-conversions 
          -Wsign-promo  -Wvirtual-inheritance

Objective-C and Objective-C++ Language Options
See Options Controlling Objective-C and Objective-C++ Dialects.
          -fconstant-string-class=class-name 
          -fgnu-runtime  -fnext-runtime 
          -fno-nil-receivers 
          -fobjc-abi-version=n 
          -fobjc-call-cxx-cdtors 
          -fobjc-direct-dispatch 
          -fobjc-exceptions 
          -fobjc-gc 
          -fobjc-nilcheck 
          -fobjc-std=objc1 
          -fno-local-ivars 
          -fivar-visibility=[public|protected|private|package] 
          -freplace-objc-classes 
          -fzero-link 
          -gen-decls 
          -Wassign-intercept 
          -Wno-protocol  -Wselector 
          -Wstrict-selector-match 
          -Wundeclared-selector

Diagnostic Message Formatting Options
See Options to Control Diagnostic Messages Formatting.
          -fmessage-length=n  
          -fdiagnostics-show-location=[once|every-line]  
          -fdiagnostics-color=[auto|never|always]  
          -fno-diagnostics-show-option  -fno-diagnostics-show-caret 
          -fdiagnostics-parseable-fixits  -fdiagnostics-generate-patch 
          -fno-show-column

Warning Options
See Options to Request or Suppress Warnings.
          -fsyntax-only  -fmax-errors=n  -Wpedantic 
          -pedantic-errors 
          -w  -Wextra  -Wall  -Waddress  -Waggregate-return  
          -Walloc-zero  -Walloc-size-larger-than=n
          -Walloca  -Walloca-larger-than=n 
          -Wno-aggressive-loop-optimizations  -Warray-bounds  -Warray-bounds=n 
          -Wno-attributes  -Wbool-compare  -Wbool-operation 
          -Wno-builtin-declaration-mismatch 
          -Wno-builtin-macro-redefined  -Wc90-c99-compat  -Wc99-c11-compat 
          -Wc++-compat  -Wc++11-compat  -Wc++14-compat  -Wcast-align  -Wcast-qual  
          -Wchar-subscripts  -Wclobbered  -Wcomment  -Wconditionally-supported  
          -Wconversion  -Wcoverage-mismatch  -Wno-cpp  -Wdangling-else  -Wdate-time 
          -Wdelete-incomplete 
          -Wno-deprecated  -Wno-deprecated-declarations  -Wno-designated-init 
          -Wdisabled-optimization 
          -Wno-discarded-qualifiers  -Wno-discarded-array-qualifiers 
          -Wno-div-by-zero  -Wdouble-promotion  -Wduplicated-cond 
          -Wempty-body  -Wenum-compare  -Wno-endif-labels  -Wexpansion-to-defined 
          -Werror  -Werror=*  -Wfatal-errors  -Wfloat-equal  -Wformat  -Wformat=2 
          -Wno-format-contains-nul  -Wno-format-extra-args  
          -Wformat-nonliteral -Wformat-overflow=n 
          -Wformat-security  -Wformat-signedness  -Wformat-truncation=n 
          -Wformat-y2k  -Wframe-address 
          -Wframe-larger-than=len  -Wno-free-nonheap-object  -Wjump-misses-init 
          -Wignored-qualifiers  -Wignored-attributes  -Wincompatible-pointer-types 
          -Wimplicit  -Wimplicit-fallthrough  -Wimplicit-fallthrough=n 
          -Wimplicit-function-declaration  -Wimplicit-int 
          -Winit-self  -Winline  -Wno-int-conversion  -Wint-in-bool-context 
          -Wno-int-to-pointer-cast  -Winvalid-memory-model  -Wno-invalid-offsetof 
          -Winvalid-pch  -Wlarger-than=len 
          -Wlogical-op  -Wlogical-not-parentheses  -Wlong-long 
          -Wmain  -Wmaybe-uninitialized  -Wmemset-elt-size  -Wmemset-transposed-args 
          -Wmisleading-indentation  -Wmissing-braces 
          -Wmissing-field-initializers  -Wmissing-include-dirs 
          -Wno-multichar  -Wnonnull  -Wnonnull-compare 
          -Wnormalized=[none|id|nfc|nfkc] 
          -Wnull-dereference  -Wodr  -Wno-overflow  -Wopenmp-simd  
          -Woverride-init-side-effects  -Woverlength-strings 
          -Wpacked  -Wpacked-bitfield-compat  -Wpadded 
          -Wparentheses  -Wno-pedantic-ms-format 
          -Wplacement-new  -Wplacement-new=n 
          -Wpointer-arith  -Wpointer-compare  -Wno-pointer-to-int-cast 
          -Wno-pragmas  -Wredundant-decls  -Wrestrict  -Wno-return-local-addr 
          -Wreturn-type  -Wsequence-point  -Wshadow  -Wno-shadow-ivar 
          -Wshadow=global,  -Wshadow=local,  -Wshadow=compatible-local 
          -Wshift-overflow  -Wshift-overflow=n 
          -Wshift-count-negative  -Wshift-count-overflow  -Wshift-negative-value 
          -Wsign-compare  -Wsign-conversion  -Wfloat-conversion 
          -Wno-scalar-storage-order 
          -Wsizeof-pointer-memaccess  -Wsizeof-array-argument 
          -Wstack-protector  -Wstack-usage=len  -Wstrict-aliasing 
          -Wstrict-aliasing=n  -Wstrict-overflow  -Wstrict-overflow=n 
          -Wstringop-overflow=n 
          -Wsuggest-attribute=[pure|const|noreturn|format] 
          -Wsuggest-final-types   -Wsuggest-final-methods  -Wsuggest-override 
          -Wmissing-format-attribute  -Wsubobject-linkage 
          -Wswitch  -Wswitch-bool  -Wswitch-default  -Wswitch-enum 
          -Wswitch-unreachable  -Wsync-nand 
          -Wsystem-headers  -Wtautological-compare  -Wtrampolines  -Wtrigraphs 
          -Wtype-limits  -Wundef 
          -Wuninitialized  -Wunknown-pragmas  -Wunsafe-loop-optimizations 
          -Wunsuffixed-float-constants  -Wunused  -Wunused-function 
          -Wunused-label  -Wunused-local-typedefs  -Wunused-macros 
          -Wunused-parameter  -Wno-unused-result 
          -Wunused-value  -Wunused-variable 
          -Wunused-const-variable  -Wunused-const-variable=n 
          -Wunused-but-set-parameter  -Wunused-but-set-variable 
          -Wuseless-cast  -Wvariadic-macros  -Wvector-operation-performance 
          -Wvla  -Wvla-larger-than=n  -Wvolatile-register-var  -Wwrite-strings 
          -Wzero-as-null-pointer-constant  -Whsa

C and Objective-C-only Warning Options
          -Wbad-function-cast  -Wmissing-declarations 
          -Wmissing-parameter-type  -Wmissing-prototypes  -Wnested-externs 
          -Wold-style-declaration  -Wold-style-definition 
          -Wstrict-prototypes  -Wtraditional  -Wtraditional-conversion 
          -Wdeclaration-after-statement  -Wpointer-sign

Debugging Options
See Options for Debugging Your Program.
          -g  -glevel  -gcoff  -gdwarf  -gdwarf-version 
          -ggdb  -grecord-gcc-switches  -gno-record-gcc-switches 
          -gstabs  -gstabs+  -gstrict-dwarf  -gno-strict-dwarf 
          -gvms  -gxcoff  -gxcoff+  -gz[=type] 
          -fdebug-prefix-map=old=new  -fdebug-types-section 
          -feliminate-dwarf2-dups  -fno-eliminate-unused-debug-types 
          -femit-struct-debug-baseonly  -femit-struct-debug-reduced 
          -femit-struct-debug-detailed[=spec-list] 
          -feliminate-unused-debug-symbols  -femit-class-debug-always 
          -fno-merge-debug-strings  -fno-dwarf2-cfi-asm 
          -fvar-tracking  -fvar-tracking-assignments

Optimization Options
See Options that Control Optimization.
          -faggressive-loop-optimizations  -falign-functions[=n] 
          -falign-jumps[=n] 
          -falign-labels[=n]  -falign-loops[=n] 
          -fassociative-math  -fauto-profile  -fauto-profile[=path] 
          -fauto-inc-dec  -fbranch-probabilities 
          -fbranch-target-load-optimize  -fbranch-target-load-optimize2 
          -fbtr-bb-exclusive  -fcaller-saves 
          -fcombine-stack-adjustments  -fconserve-stack 
          -fcompare-elim  -fcprop-registers  -fcrossjumping 
          -fcse-follow-jumps  -fcse-skip-blocks  -fcx-fortran-rules 
          -fcx-limited-range 
          -fdata-sections  -fdce  -fdelayed-branch 
          -fdelete-null-pointer-checks  -fdevirtualize  -fdevirtualize-speculatively 
          -fdevirtualize-at-ltrans  -fdse 
          -fearly-inlining  -fipa-sra  -fexpensive-optimizations  -ffat-lto-objects 
          -ffast-math  -ffinite-math-only  -ffloat-store  -fexcess-precision=style 
          -fforward-propagate  -ffp-contract=style  -ffunction-sections 
          -fgcse  -fgcse-after-reload  -fgcse-las  -fgcse-lm  -fgraphite-identity 
          -fgcse-sm  -fhoist-adjacent-loads  -fif-conversion 
          -fif-conversion2  -findirect-inlining 
          -finline-functions  -finline-functions-called-once  -finline-limit=n 
          -finline-small-functions  -fipa-cp  -fipa-cp-clone 
          -fipa-cp-alignment  -fipa-bit-cp 
          -fipa-pta  -fipa-profile  -fipa-pure-const  -fipa-reference  -fipa-icf 
          -fira-algorithm=algorithm 
          -fira-region=region  -fira-hoist-pressure 
          -fira-loop-pressure  -fno-ira-share-save-slots 
          -fno-ira-share-spill-slots 
          -fisolate-erroneous-paths-dereference  -fisolate-erroneous-paths-attribute 
          -fivopts  -fkeep-inline-functions  -fkeep-static-functions 
          -fkeep-static-consts  -flimit-function-alignment  -flive-range-shrinkage 
          -floop-block  -floop-interchange  -floop-strip-mine 
          -floop-unroll-and-jam  -floop-nest-optimize 
          -floop-parallelize-all  -flra-remat  -flto  -flto-compression-level 
          -flto-partition=alg  -fmerge-all-constants 
          -fmerge-constants  -fmodulo-sched  -fmodulo-sched-allow-regmoves 
          -fmove-loop-invariants  -fno-branch-count-reg 
          -fno-defer-pop  -fno-fp-int-builtin-inexact  -fno-function-cse 
          -fno-guess-branch-probability  -fno-inline  -fno-math-errno  -fno-peephole 
          -fno-peephole2  -fno-printf-return-value  -fno-sched-interblock 
          -fno-sched-spec  -fno-signed-zeros 
          -fno-toplevel-reorder  -fno-trapping-math  -fno-zero-initialized-in-bss 
          -fomit-frame-pointer  -foptimize-sibling-calls 
          -fpartial-inlining  -fpeel-loops  -fpredictive-commoning 
          -fprefetch-loop-arrays 
          -fprofile-correction 
          -fprofile-use  -fprofile-use=path  -fprofile-values 
          -fprofile-reorder-functions 
          -freciprocal-math  -free  -frename-registers  -freorder-blocks 
          -freorder-blocks-algorithm=algorithm 
          -freorder-blocks-and-partition  -freorder-functions 
          -frerun-cse-after-loop  -freschedule-modulo-scheduled-loops 
          -frounding-math  -fsched2-use-superblocks  -fsched-pressure 
          -fsched-spec-load  -fsched-spec-load-dangerous 
          -fsched-stalled-insns-dep[=n]  -fsched-stalled-insns[=n] 
          -fsched-group-heuristic  -fsched-critical-path-heuristic 
          -fsched-spec-insn-heuristic  -fsched-rank-heuristic 
          -fsched-last-insn-heuristic  -fsched-dep-count-heuristic 
          -fschedule-fusion 
          -fschedule-insns  -fschedule-insns2  -fsection-anchors 
          -fselective-scheduling  -fselective-scheduling2 
          -fsel-sched-pipelining  -fsel-sched-pipelining-outer-loops 
          -fsemantic-interposition  -fshrink-wrap  -fshrink-wrap-separate 
          -fsignaling-nans 
          -fsingle-precision-constant  -fsplit-ivs-in-unroller  -fsplit-loops
          -fsplit-paths 
          -fsplit-wide-types  -fssa-backprop  -fssa-phiopt 
          -fstdarg-opt  -fstore-merging  -fstrict-aliasing 
          -fstrict-overflow  -fthread-jumps  -ftracer  -ftree-bit-ccp 
          -ftree-builtin-call-dce  -ftree-ccp  -ftree-ch 
          -ftree-coalesce-vars  -ftree-copy-prop  -ftree-dce  -ftree-dominator-opts 
          -ftree-dse  -ftree-forwprop  -ftree-fre  -fcode-hoisting 
          -ftree-loop-if-convert  -ftree-loop-im 
          -ftree-phiprop  -ftree-loop-distribution  -ftree-loop-distribute-patterns 
          -ftree-loop-ivcanon  -ftree-loop-linear  -ftree-loop-optimize 
          -ftree-loop-vectorize 
          -ftree-parallelize-loops=n  -ftree-pre  -ftree-partial-pre  -ftree-pta 
          -ftree-reassoc  -ftree-sink  -ftree-slsr  -ftree-sra 
          -ftree-switch-conversion  -ftree-tail-merge 
          -ftree-ter  -ftree-vectorize  -ftree-vrp  -funconstrained-commons 
          -funit-at-a-time  -funroll-all-loops  -funroll-loops 
          -funsafe-math-optimizations  -funswitch-loops 
          -fipa-ra  -fvariable-expansion-in-unroller  -fvect-cost-model  -fvpt 
          -fweb  -fwhole-program  -fwpa  -fuse-linker-plugin 
          --param name=value
          -O  -O0  -O1  -O2  -O3  -Os  -Ofast  -Og

Program Instrumentation Options
See Program Instrumentation Options.
          -p  -pg  -fprofile-arcs  --coverage  -ftest-coverage 
          -fprofile-dir=path  -fprofile-generate  -fprofile-generate=path 
          -fsanitize=style  -fsanitize-recover  -fsanitize-recover=style 
          -fasan-shadow-offset=number  -fsanitize-sections=s1,s2,... 
          -fsanitize-undefined-trap-on-error  -fbounds-check 
          -fcheck-pointer-bounds  -fchkp-check-incomplete-type 
          -fchkp-first-field-has-own-bounds  -fchkp-narrow-bounds 
          -fchkp-narrow-to-innermost-array  -fchkp-optimize 
          -fchkp-use-fast-string-functions  -fchkp-use-nochk-string-functions 
          -fchkp-use-static-bounds  -fchkp-use-static-const-bounds 
          -fchkp-treat-zero-dynamic-size-as-infinite  -fchkp-check-read 
          -fchkp-check-read  -fchkp-check-write  -fchkp-store-bounds 
          -fchkp-instrument-calls  -fchkp-instrument-marked-only 
          -fchkp-use-wrappers  -fchkp-flexible-struct-trailing-arrays
          -fstack-protector  -fstack-protector-all  -fstack-protector-strong 
          -fstack-protector-explicit  -fstack-check 
          -fstack-limit-register=reg  -fstack-limit-symbol=sym 
          -fno-stack-limit  -fsplit-stack 
          -fvtable-verify=[std|preinit|none] 
          -fvtv-counts  -fvtv-debug 
          -finstrument-functions 
          -finstrument-functions-exclude-function-list=sym,sym,... 
          -finstrument-functions-exclude-file-list=file,file,...

Preprocessor Options
See Options Controlling the Preprocessor.
          -Aquestion=answer 
          -A-question[=answer] 
          -C  -CC  -Dmacro[=defn] 
          -dD  -dI  -dM  -dN  -dU 
          -fdebug-cpp  -fdirectives-only  -fdollars-in-identifiers  
          -fexec-charset=charset  -fextended-identifiers  
          -finput-charset=charset  -fno-canonical-system-headers 
          -fpch-deps  -fpch-preprocess  -fpreprocessed 
          -ftabstop=width  -ftrack-macro-expansion  
          -fwide-exec-charset=charset  -fworking-directory 
          -H  -imacros file  -include file 
          -M  -MD  -MF  -MG  -MM  -MMD  -MP  -MQ  -MT 
          -no-integrated-cpp  -P  -pthread  -remap 
          -traditional  -traditional-cpp  -trigraphs 
          -Umacro  -undef  
          -Wp,option  -Xpreprocessor option

Assembler Options
See Passing Options to the Assembler.
          -Wa,option  -Xassembler option

Linker Options
See Options for Linking.
          object-file-name  -fuse-ld=linker  -llibrary 
          -nostartfiles  -nodefaultlibs  -nostdlib  -pie  -pthread  -rdynamic 
          -s  -static  -static-libgcc  -static-libstdc++ 
          -static-libasan  -static-libtsan  -static-liblsan  -static-libubsan 
          -static-libmpx  -static-libmpxwrappers 
          -shared  -shared-libgcc  -symbolic 
          -T script  -Wl,option  -Xlinker option 
          -u symbol  -z keyword

Directory Options
See Options for Directory Search.
          -Bprefix  -Idir  -I- 
          -idirafter dir 
          -imacros file  -imultilib dir 
          -iplugindir=dir  -iprefix file 
          -iquote dir  -isysroot dir  -isystem dir 
          -iwithprefix dir  -iwithprefixbefore dir  
          -Ldir  -no-canonical-prefixes  --no-sysroot-suffix 
          -nostdinc  -nostdinc++  --sysroot=dir

Code Generation Options
See Options for Code Generation Conventions.
          -fcall-saved-reg  -fcall-used-reg 
          -ffixed-reg  -fexceptions 
          -fnon-call-exceptions  -fdelete-dead-exceptions  -funwind-tables 
          -fasynchronous-unwind-tables 
          -fno-gnu-unique 
          -finhibit-size-directive  -fno-common  -fno-ident 
          -fpcc-struct-return  -fpic  -fPIC  -fpie  -fPIE  -fno-plt 
          -fno-jump-tables 
          -frecord-gcc-switches 
          -freg-struct-return  -fshort-enums  -fshort-wchar 
          -fverbose-asm  -fpack-struct[=n]  
          -fleading-underscore  -ftls-model=model 
          -fstack-reuse=reuse_level 
          -ftrampolines  -ftrapv  -fwrapv 
          -fvisibility=[default|internal|hidden|protected] 
          -fstrict-volatile-bitfields  -fsync-libcalls

Developer Options
See GCC Developer Options.
          -dletters  -dumpspecs  -dumpmachine  -dumpversion 
          -dumpfullversion  -fchecking  -fchecking=n  -fdbg-cnt-list 
          -fdbg-cnt=counter-value-list 
          -fdisable-ipa-pass_name 
          -fdisable-rtl-pass_name 
          -fdisable-rtl-pass-name=range-list 
          -fdisable-tree-pass_name 
          -fdisable-tree-pass-name=range-list 
          -fdump-noaddr  -fdump-unnumbered  -fdump-unnumbered-links 
          -fdump-translation-unit[-n] 
          -fdump-class-hierarchy[-n] 
          -fdump-ipa-all  -fdump-ipa-cgraph  -fdump-ipa-inline 
          -fdump-passes 
          -fdump-rtl-pass  -fdump-rtl-pass=filename 
          -fdump-statistics 
          -fdump-tree-all 
          -fdump-tree-original[-n]  
          -fdump-tree-optimized[-n] 
          -fdump-tree-cfg  -fdump-tree-alias 
          -fdump-tree-ch 
          -fdump-tree-ssa[-n]  -fdump-tree-pre[-n] 
          -fdump-tree-ccp[-n]  -fdump-tree-dce[-n] 
          -fdump-tree-gimple[-raw] 
          -fdump-tree-dom[-n] 
          -fdump-tree-dse[-n] 
          -fdump-tree-phiprop[-n] 
          -fdump-tree-phiopt[-n] 
          -fdump-tree-backprop[-n] 
          -fdump-tree-forwprop[-n] 
          -fdump-tree-nrv  -fdump-tree-vect 
          -fdump-tree-sink 
          -fdump-tree-sra[-n] 
          -fdump-tree-forwprop[-n] 
          -fdump-tree-fre[-n] 
          -fdump-tree-vtable-verify 
          -fdump-tree-vrp[-n] 
          -fdump-tree-split-paths[-n] 
          -fdump-tree-storeccp[-n] 
          -fdump-final-insns=file 
          -fcompare-debug[=opts]  -fcompare-debug-second 
          -fenable-kind-pass 
          -fenable-kind-pass=range-list 
          -fira-verbose=n 
          -flto-report  -flto-report-wpa  -fmem-report-wpa 
          -fmem-report  -fpre-ipa-mem-report  -fpost-ipa-mem-report 
          -fopt-info  -fopt-info-options[=file] 
          -fprofile-report 
          -frandom-seed=string  -fsched-verbose=n 
          -fsel-sched-verbose  -fsel-sched-dump-cfg  -fsel-sched-pipelining-verbose 
          -fstats  -fstack-usage  -ftime-report  -ftime-report-details 
          -fvar-tracking-assignments-toggle  -gtoggle 
          -print-file-name=library  -print-libgcc-file-name 
          -print-multi-directory  -print-multi-lib  -print-multi-os-directory 
          -print-prog-name=program  -print-search-dirs  -Q 
          -print-sysroot  -print-sysroot-headers-suffix 
          -save-temps  -save-temps=cwd  -save-temps=obj  -time[=file]

Machine-Dependent Options
See Machine-Dependent Options.

AArch64 Options

          -mabi=name  -mbig-endian  -mlittle-endian 
          -mgeneral-regs-only 
          -mcmodel=tiny  -mcmodel=small  -mcmodel=large 
          -mstrict-align 
          -momit-leaf-frame-pointer  -mno-omit-leaf-frame-pointer 
          -mtls-dialect=desc  -mtls-dialect=traditional 
          -mtls-size=size 
          -mfix-cortex-a53-835769  -mno-fix-cortex-a53-835769 
          -mfix-cortex-a53-843419  -mno-fix-cortex-a53-843419 
          -mlow-precision-recip-sqrt  -mno-low-precision-recip-sqrt
          -mlow-precision-sqrt  -mno-low-precision-sqrt
          -mlow-precision-div  -mno-low-precision-div 
          -march=name  -mcpu=name  -mtune=name

Adapteva Epiphany Options

          -mhalf-reg-file  -mprefer-short-insn-regs 
          -mbranch-cost=num  -mcmove  -mnops=num  -msoft-cmpsf 
          -msplit-lohi  -mpost-inc  -mpost-modify  -mstack-offset=num 
          -mround-nearest  -mlong-calls  -mshort-calls  -msmall16 
          -mfp-mode=mode  -mvect-double  -max-vect-align=num 
          -msplit-vecmove-early  -m1reg-reg

ARC Options

          -mbarrel-shifter 
          -mcpu=cpu  -mA6  -mARC600  -mA7  -mARC700 
          -mdpfp  -mdpfp-compact  -mdpfp-fast  -mno-dpfp-lrsr 
          -mea  -mno-mpy  -mmul32x16  -mmul64  -matomic 
          -mnorm  -mspfp  -mspfp-compact  -mspfp-fast  -msimd  -msoft-float  -mswap 
          -mcrc  -mdsp-packa  -mdvbf  -mlock  -mmac-d16  -mmac-24  -mrtsc  -mswape 
          -mtelephony  -mxy  -misize  -mannotate-align  -marclinux  -marclinux_prof 
          -mlong-calls  -mmedium-calls  -msdata 
          -mvolatile-cache  -mtp-regno=regno 
          -malign-call  -mauto-modify-reg  -mbbit-peephole  -mno-brcc 
          -mcase-vector-pcrel  -mcompact-casesi  -mno-cond-exec  -mearly-cbranchsi 
          -mexpand-adddi  -mindexed-loads  -mlra  -mlra-priority-none 
          -mlra-priority-compact mlra-priority-noncompact  -mno-millicode 
          -mmixed-code  -mq-class  -mRcq  -mRcw  -msize-level=level 
          -mtune=cpu  -mmultcost=num 
          -munalign-prob-threshold=probability  -mmpy-option=multo 
          -mdiv-rem  -mcode-density  -mll64  -mfpu=fpu

ARM Options

          -mapcs-frame  -mno-apcs-frame 
          -mabi=name 
          -mapcs-stack-check  -mno-apcs-stack-check 
          -mapcs-reentrant  -mno-apcs-reentrant 
          -msched-prolog  -mno-sched-prolog 
          -mlittle-endian  -mbig-endian 
          -mfloat-abi=name 
          -mfp16-format=name
          -mthumb-interwork  -mno-thumb-interwork 
          -mcpu=name  -march=name  -mfpu=name  
          -mtune=name  -mprint-tune-info 
          -mstructure-size-boundary=n 
          -mabort-on-noreturn 
          -mlong-calls  -mno-long-calls 
          -msingle-pic-base  -mno-single-pic-base 
          -mpic-register=reg 
          -mnop-fun-dllimport 
          -mpoke-function-name 
          -mthumb  -marm 
          -mtpcs-frame  -mtpcs-leaf-frame 
          -mcaller-super-interworking  -mcallee-super-interworking 
          -mtp=name  -mtls-dialect=dialect 
          -mword-relocations 
          -mfix-cortex-m3-ldrd 
          -munaligned-access 
          -mneon-for-64bits 
          -mslow-flash-data 
          -masm-syntax-unified 
          -mrestrict-it 
          -mpure-code 
          -mcmse

AVR Options

          -mmcu=mcu  -mabsdata  -maccumulate-args 
          -mbranch-cost=cost 
          -mcall-prologues  -mint8  -mn_flash=size  -mno-interrupts 
          -mrelax  -mrmw  -mstrict-X  -mtiny-stack  -mfract-convert-truncate 
          -nodevicelib 
          -Waddr-space-convert  -Wmisspelled-isr

Blackfin Options

          -mcpu=cpu[-sirevision] 
          -msim  -momit-leaf-frame-pointer  -mno-omit-leaf-frame-pointer 
          -mspecld-anomaly  -mno-specld-anomaly  -mcsync-anomaly  -mno-csync-anomaly 
          -mlow-64k  -mno-low64k  -mstack-check-l1  -mid-shared-library 
          -mno-id-shared-library  -mshared-library-id=n 
          -mleaf-id-shared-library  -mno-leaf-id-shared-library 
          -msep-data  -mno-sep-data  -mlong-calls  -mno-long-calls 
          -mfast-fp  -minline-plt  -mmulticore  -mcorea  -mcoreb  -msdram 
          -micplb

C6X Options

          -mbig-endian  -mlittle-endian  -march=cpu 
          -msim  -msdata=sdata-type

CRIS Options

          -mcpu=cpu  -march=cpu  -mtune=cpu 
          -mmax-stack-frame=n  -melinux-stacksize=n 
          -metrax4  -metrax100  -mpdebug  -mcc-init  -mno-side-effects 
          -mstack-align  -mdata-align  -mconst-align 
          -m32-bit  -m16-bit  -m8-bit  -mno-prologue-epilogue  -mno-gotplt 
          -melf  -maout  -melinux  -mlinux  -sim  -sim2 
          -mmul-bug-workaround  -mno-mul-bug-workaround

CR16 Options

          -mmac 
          -mcr16cplus  -mcr16c 
          -msim  -mint32  -mbit-ops
          -mdata-model=model

Darwin Options

          -all_load  -allowable_client  -arch  -arch_errors_fatal 
          -arch_only  -bind_at_load  -bundle  -bundle_loader 
          -client_name  -compatibility_version  -current_version 
          -dead_strip 
          -dependency-file  -dylib_file  -dylinker_install_name 
          -dynamic  -dynamiclib  -exported_symbols_list 
          -filelist  -flat_namespace  -force_cpusubtype_ALL 
          -force_flat_namespace  -headerpad_max_install_names 
          -iframework 
          -image_base  -init  -install_name  -keep_private_externs 
          -multi_module  -multiply_defined  -multiply_defined_unused 
          -noall_load   -no_dead_strip_inits_and_terms 
          -nofixprebinding  -nomultidefs  -noprebind  -noseglinkedit 
          -pagezero_size  -prebind  -prebind_all_twolevel_modules 
          -private_bundle  -read_only_relocs  -sectalign 
          -sectobjectsymbols  -whyload  -seg1addr 
          -sectcreate  -sectobjectsymbols  -sectorder 
          -segaddr  -segs_read_only_addr  -segs_read_write_addr 
          -seg_addr_table  -seg_addr_table_filename  -seglinkedit 
          -segprot  -segs_read_only_addr  -segs_read_write_addr 
          -single_module  -static  -sub_library  -sub_umbrella 
          -twolevel_namespace  -umbrella  -undefined 
          -unexported_symbols_list  -weak_reference_mismatches 
          -whatsloaded  -F  -gused  -gfull  -mmacosx-version-min=version 
          -mkernel  -mone-byte-bool

DEC Alpha Options

          -mno-fp-regs  -msoft-float 
          -mieee  -mieee-with-inexact  -mieee-conformant 
          -mfp-trap-mode=mode  -mfp-rounding-mode=mode 
          -mtrap-precision=mode  -mbuild-constants 
          -mcpu=cpu-type  -mtune=cpu-type 
          -mbwx  -mmax  -mfix  -mcix 
          -mfloat-vax  -mfloat-ieee 
          -mexplicit-relocs  -msmall-data  -mlarge-data 
          -msmall-text  -mlarge-text 
          -mmemory-latency=time

FR30 Options

          -msmall-model  -mno-lsim

FT32 Options

          -msim  -mlra  -mnodiv

FRV Options

          -mgpr-32  -mgpr-64  -mfpr-32  -mfpr-64 
          -mhard-float  -msoft-float 
          -malloc-cc  -mfixed-cc  -mdword  -mno-dword 
          -mdouble  -mno-double 
          -mmedia  -mno-media  -mmuladd  -mno-muladd 
          -mfdpic  -minline-plt  -mgprel-ro  -multilib-library-pic 
          -mlinked-fp  -mlong-calls  -malign-labels 
          -mlibrary-pic  -macc-4  -macc-8 
          -mpack  -mno-pack  -mno-eflags  -mcond-move  -mno-cond-move 
          -moptimize-membar  -mno-optimize-membar 
          -mscc  -mno-scc  -mcond-exec  -mno-cond-exec 
          -mvliw-branch  -mno-vliw-branch 
          -mmulti-cond-exec  -mno-multi-cond-exec  -mnested-cond-exec 
          -mno-nested-cond-exec  -mtomcat-stats 
          -mTLS  -mtls 
          -mcpu=cpu

GNU/Linux Options

          -mglibc  -muclibc  -mmusl  -mbionic  -mandroid 
          -tno-android-cc  -tno-android-ld

H8/300 Options

          -mrelax  -mh  -ms  -mn  -mexr  -mno-exr  -mint32  -malign-300

HPPA Options

          -march=architecture-type 
          -mcaller-copies  -mdisable-fpregs  -mdisable-indexing 
          -mfast-indirect-calls  -mgas  -mgnu-ld   -mhp-ld 
          -mfixed-range=register-range 
          -mjump-in-delay  -mlinker-opt  -mlong-calls 
          -mlong-load-store  -mno-disable-fpregs 
          -mno-disable-indexing  -mno-fast-indirect-calls  -mno-gas 
          -mno-jump-in-delay  -mno-long-load-store 
          -mno-portable-runtime  -mno-soft-float 
          -mno-space-regs  -msoft-float  -mpa-risc-1-0 
          -mpa-risc-1-1  -mpa-risc-2-0  -mportable-runtime 
          -mschedule=cpu-type  -mspace-regs  -msio  -mwsio 
          -munix=unix-std  -nolibdld  -static  -threads

IA-64 Options

          -mbig-endian  -mlittle-endian  -mgnu-as  -mgnu-ld  -mno-pic 
          -mvolatile-asm-stop  -mregister-names  -msdata  -mno-sdata 
          -mconstant-gp  -mauto-pic  -mfused-madd 
          -minline-float-divide-min-latency 
          -minline-float-divide-max-throughput 
          -mno-inline-float-divide 
          -minline-int-divide-min-latency 
          -minline-int-divide-max-throughput  
          -mno-inline-int-divide 
          -minline-sqrt-min-latency  -minline-sqrt-max-throughput 
          -mno-inline-sqrt 
          -mdwarf2-asm  -mearly-stop-bits 
          -mfixed-range=register-range  -mtls-size=tls-size 
          -mtune=cpu-type  -milp32  -mlp64 
          -msched-br-data-spec  -msched-ar-data-spec  -msched-control-spec 
          -msched-br-in-data-spec  -msched-ar-in-data-spec  -msched-in-control-spec 
          -msched-spec-ldc  -msched-spec-control-ldc 
          -msched-prefer-non-data-spec-insns  -msched-prefer-non-control-spec-insns 
          -msched-stop-bits-after-every-cycle  -msched-count-spec-in-critical-path 
          -msel-sched-dont-check-control-spec  -msched-fp-mem-deps-zero-cost 
          -msched-max-memory-insns-hard-limit  -msched-max-memory-insns=max-insns

LM32 Options

          -mbarrel-shift-enabled  -mdivide-enabled  -mmultiply-enabled 
          -msign-extend-enabled  -muser-enabled

M32R/D Options

          -m32r2  -m32rx  -m32r 
          -mdebug 
          -malign-loops  -mno-align-loops 
          -missue-rate=number 
          -mbranch-cost=number 
          -mmodel=code-size-model-type 
          -msdata=sdata-type 
          -mno-flush-func  -mflush-func=name 
          -mno-flush-trap  -mflush-trap=number 
          -G num

M32C Options

          -mcpu=cpu  -msim  -memregs=number

M680x0 Options

          -march=arch  -mcpu=cpu  -mtune=tune 
          -m68000  -m68020  -m68020-40  -m68020-60  -m68030  -m68040 
          -m68060  -mcpu32  -m5200  -m5206e  -m528x  -m5307  -m5407 
          -mcfv4e  -mbitfield  -mno-bitfield  -mc68000  -mc68020 
          -mnobitfield  -mrtd  -mno-rtd  -mdiv  -mno-div  -mshort 
          -mno-short  -mhard-float  -m68881  -msoft-float  -mpcrel 
          -malign-int  -mstrict-align  -msep-data  -mno-sep-data 
          -mshared-library-id=n  -mid-shared-library  -mno-id-shared-library 
          -mxgot  -mno-xgot  -mlong-jump-table-offsets

MCore Options

          -mhardlit  -mno-hardlit  -mdiv  -mno-div  -mrelax-immediates 
          -mno-relax-immediates  -mwide-bitfields  -mno-wide-bitfields 
          -m4byte-functions  -mno-4byte-functions  -mcallgraph-data 
          -mno-callgraph-data  -mslow-bytes  -mno-slow-bytes  -mno-lsim 
          -mlittle-endian  -mbig-endian  -m210  -m340  -mstack-increment

MeP Options

          -mabsdiff  -mall-opts  -maverage  -mbased=n  -mbitops 
          -mc=n  -mclip  -mconfig=name  -mcop  -mcop32  -mcop64  -mivc2 
          -mdc  -mdiv  -meb  -mel  -mio-volatile  -ml  -mleadz  -mm  -mminmax 
          -mmult  -mno-opts  -mrepeat  -ms  -msatur  -msdram  -msim  -msimnovec  -mtf 
          -mtiny=n

MicroBlaze Options

          -msoft-float  -mhard-float  -msmall-divides  -mcpu=cpu 
          -mmemcpy  -mxl-soft-mul  -mxl-soft-div  -mxl-barrel-shift 
          -mxl-pattern-compare  -mxl-stack-check  -mxl-gp-opt  -mno-clearbss 
          -mxl-multiply-high  -mxl-float-convert  -mxl-float-sqrt 
          -mbig-endian  -mlittle-endian  -mxl-reorder  -mxl-mode-app-model

MIPS Options

          -EL  -EB  -march=arch  -mtune=arch 
          -mips1  -mips2  -mips3  -mips4  -mips32  -mips32r2  -mips32r3  -mips32r5 
          -mips32r6  -mips64  -mips64r2  -mips64r3  -mips64r5  -mips64r6 
          -mips16  -mno-mips16  -mflip-mips16 
          -minterlink-compressed  -mno-interlink-compressed 
          -minterlink-mips16  -mno-interlink-mips16 
          -mabi=abi  -mabicalls  -mno-abicalls 
          -mshared  -mno-shared  -mplt  -mno-plt  -mxgot  -mno-xgot 
          -mgp32  -mgp64  -mfp32  -mfpxx  -mfp64  -mhard-float  -msoft-float 
          -mno-float  -msingle-float  -mdouble-float 
          -modd-spreg  -mno-odd-spreg 
          -mabs=mode  -mnan=encoding 
          -mdsp  -mno-dsp  -mdspr2  -mno-dspr2 
          -mmcu  -mmno-mcu 
          -meva  -mno-eva 
          -mvirt  -mno-virt 
          -mxpa  -mno-xpa 
          -mmicromips  -mno-micromips 
          -mmsa  -mno-msa 
          -mfpu=fpu-type 
          -msmartmips  -mno-smartmips 
          -mpaired-single  -mno-paired-single  -mdmx  -mno-mdmx 
          -mips3d  -mno-mips3d  -mmt  -mno-mt  -mllsc  -mno-llsc 
          -mlong64  -mlong32  -msym32  -mno-sym32 
          -Gnum  -mlocal-sdata  -mno-local-sdata 
          -mextern-sdata  -mno-extern-sdata  -mgpopt  -mno-gopt 
          -membedded-data  -mno-embedded-data 
          -muninit-const-in-rodata  -mno-uninit-const-in-rodata 
          -mcode-readable=setting 
          -msplit-addresses  -mno-split-addresses 
          -mexplicit-relocs  -mno-explicit-relocs 
          -mcheck-zero-division  -mno-check-zero-division 
          -mdivide-traps  -mdivide-breaks 
          -mmemcpy  -mno-memcpy  -mlong-calls  -mno-long-calls 
          -mmad  -mno-mad  -mimadd  -mno-imadd  -mfused-madd  -mno-fused-madd  -nocpp 
          -mfix-24k  -mno-fix-24k 
          -mfix-r4000  -mno-fix-r4000  -mfix-r4400  -mno-fix-r4400 
          -mfix-r10000  -mno-fix-r10000  -mfix-rm7000  -mno-fix-rm7000 
          -mfix-vr4120  -mno-fix-vr4120 
          -mfix-vr4130  -mno-fix-vr4130  -mfix-sb1  -mno-fix-sb1 
          -mflush-func=func  -mno-flush-func 
          -mbranch-cost=num  -mbranch-likely  -mno-branch-likely 
          -mcompact-branches=policy 
          -mfp-exceptions  -mno-fp-exceptions 
          -mvr4130-align  -mno-vr4130-align  -msynci  -mno-synci 
          -mlxc1-sxc1 -mno-lxc1-sxc1 -mmadd4 -mno-madd4 
          -mrelax-pic-calls  -mno-relax-pic-calls  -mmcount-ra-address 
          -mframe-header-opt  -mno-frame-header-opt

MMIX Options

          -mlibfuncs  -mno-libfuncs  -mepsilon  -mno-epsilon  -mabi=gnu 
          -mabi=mmixware  -mzero-extend  -mknuthdiv  -mtoplevel-symbols 
          -melf  -mbranch-predict  -mno-branch-predict  -mbase-addresses 
          -mno-base-addresses  -msingle-exit  -mno-single-exit

MN10300 Options

          -mmult-bug  -mno-mult-bug 
          -mno-am33  -mam33  -mam33-2  -mam34 
          -mtune=cpu-type 
          -mreturn-pointer-on-d0 
          -mno-crt0  -mrelax  -mliw  -msetlb

Moxie Options

          -meb  -mel  -mmul.x  -mno-crt0

MSP430 Options

          -msim  -masm-hex  -mmcu=  -mcpu=  -mlarge  -msmall  -mrelax 
          -mwarn-mcu 
          -mcode-region=  -mdata-region= 
          -msilicon-errata=  -msilicon-errata-warn= 
          -mhwmult=  -minrt

NDS32 Options

          -mbig-endian  -mlittle-endian 
          -mreduced-regs  -mfull-regs 
          -mcmov  -mno-cmov 
          -mperf-ext  -mno-perf-ext 
          -mv3push  -mno-v3push 
          -m16bit  -mno-16bit 
          -misr-vector-size=num 
          -mcache-block-size=num 
          -march=arch 
          -mcmodel=code-model 
          -mctor-dtor  -mrelax

Nios II Options

          -G num  -mgpopt=option  -mgpopt  -mno-gpopt 
          -mel  -meb 
          -mno-bypass-cache  -mbypass-cache 
          -mno-cache-volatile  -mcache-volatile 
          -mno-fast-sw-div  -mfast-sw-div 
          -mhw-mul  -mno-hw-mul  -mhw-mulx  -mno-hw-mulx  -mno-hw-div  -mhw-div 
          -mcustom-insn=N  -mno-custom-insn 
          -mcustom-fpu-cfg=name 
          -mhal  -msmallc  -msys-crt0=name  -msys-lib=name 
          -march=arch  -mbmx  -mno-bmx  -mcdx  -mno-cdx

Nvidia PTX Options

          -m32  -m64  -mmainkernel  -moptimize

PDP-11 Options

          -mfpu  -msoft-float  -mac0  -mno-ac0  -m40  -m45  -m10 
          -mbcopy  -mbcopy-builtin  -mint32  -mno-int16 
          -mint16  -mno-int32  -mfloat32  -mno-float64 
          -mfloat64  -mno-float32  -mabshi  -mno-abshi 
          -mbranch-expensive  -mbranch-cheap 
          -munix-asm  -mdec-asm

picoChip Options

          -mae=ae_type  -mvliw-lookahead=N 
          -msymbol-as-address  -mno-inefficient-warnings

PowerPC Options See RS/6000 and PowerPC Options.

RL78 Options

          -msim  -mmul=none  -mmul=g13  -mmul=g14  -mallregs 
          -mcpu=g10  -mcpu=g13  -mcpu=g14  -mg10  -mg13  -mg14 
          -m64bit-doubles  -m32bit-doubles  -msave-mduc-in-interrupts

RS/6000 and PowerPC Options

          -mcpu=cpu-type 
          -mtune=cpu-type 
          -mcmodel=code-model 
          -mpowerpc64 
          -maltivec  -mno-altivec 
          -mpowerpc-gpopt  -mno-powerpc-gpopt 
          -mpowerpc-gfxopt  -mno-powerpc-gfxopt 
          -mmfcrf  -mno-mfcrf  -mpopcntb  -mno-popcntb  -mpopcntd  -mno-popcntd 
          -mfprnd  -mno-fprnd 
          -mcmpb  -mno-cmpb  -mmfpgpr  -mno-mfpgpr  -mhard-dfp  -mno-hard-dfp 
          -mfull-toc   -mminimal-toc  -mno-fp-in-toc  -mno-sum-in-toc 
          -m64  -m32  -mxl-compat  -mno-xl-compat  -mpe 
          -malign-power  -malign-natural 
          -msoft-float  -mhard-float  -mmultiple  -mno-multiple 
          -msingle-float  -mdouble-float  -msimple-fpu 
          -mstring  -mno-string  -mupdate  -mno-update 
          -mavoid-indexed-addresses  -mno-avoid-indexed-addresses 
          -mfused-madd  -mno-fused-madd  -mbit-align  -mno-bit-align 
          -mstrict-align  -mno-strict-align  -mrelocatable 
          -mno-relocatable  -mrelocatable-lib  -mno-relocatable-lib 
          -mtoc  -mno-toc  -mlittle  -mlittle-endian  -mbig  -mbig-endian 
          -mdynamic-no-pic  -maltivec  -mswdiv  -msingle-pic-base 
          -mprioritize-restricted-insns=priority 
          -msched-costly-dep=dependence_type 
          -minsert-sched-nops=scheme 
          -mcall-sysv  -mcall-netbsd 
          -maix-struct-return  -msvr4-struct-return 
          -mabi=abi-type  -msecure-plt  -mbss-plt 
          -mblock-move-inline-limit=num 
          -misel  -mno-isel 
          -misel=yes  -misel=no 
          -mspe  -mno-spe 
          -mspe=yes  -mspe=no 
          -mpaired 
          -mgen-cell-microcode  -mwarn-cell-microcode 
          -mvrsave  -mno-vrsave 
          -mmulhw  -mno-mulhw 
          -mdlmzb  -mno-dlmzb 
          -mfloat-gprs=yes  -mfloat-gprs=no  -mfloat-gprs=single  -mfloat-gprs=double 
          -mprototype  -mno-prototype 
          -msim  -mmvme  -mads  -myellowknife  -memb  -msdata 
          -msdata=opt  -mvxworks  -G num 
          -mrecip  -mrecip=opt  -mno-recip  -mrecip-precision 
          -mno-recip-precision 
          -mveclibabi=type  -mfriz  -mno-friz 
          -mpointers-to-nested-functions  -mno-pointers-to-nested-functions 
          -msave-toc-indirect  -mno-save-toc-indirect 
          -mpower8-fusion  -mno-mpower8-fusion  -mpower8-vector  -mno-power8-vector 
          -mcrypto  -mno-crypto  -mhtm  -mno-htm  -mdirect-move  -mno-direct-move 
          -mquad-memory  -mno-quad-memory 
          -mquad-memory-atomic  -mno-quad-memory-atomic 
          -mcompat-align-parm  -mno-compat-align-parm 
          -mupper-regs-df  -mno-upper-regs-df  -mupper-regs-sf  -mno-upper-regs-sf 
          -mupper-regs-di  -mno-upper-regs-di 
          -mupper-regs  -mno-upper-regs 
          -mfloat128  -mno-float128  -mfloat128-hardware  -mno-float128-hardware 
          -mgnu-attribute  -mno-gnu-attribute 
          -mstack-protector-guard=guard -mstack-protector-guard-reg=reg 
          -mstack-protector-guard-offset=offset 
          -mlra  -mno-lra

RX Options

          -m64bit-doubles  -m32bit-doubles  -fpu  -nofpu
          -mcpu=
          -mbig-endian-data  -mlittle-endian-data 
          -msmall-data 
          -msim  -mno-sim
          -mas100-syntax  -mno-as100-syntax
          -mrelax
          -mmax-constant-size=
          -mint-register=
          -mpid
          -mallow-string-insns  -mno-allow-string-insns
          -mjsr
          -mno-warn-multiple-fast-interrupts
          -msave-acc-in-interrupts

S/390 and zSeries Options

          -mtune=cpu-type  -march=cpu-type 
          -mhard-float  -msoft-float  -mhard-dfp  -mno-hard-dfp 
          -mlong-double-64  -mlong-double-128 
          -mbackchain  -mno-backchain  -mpacked-stack  -mno-packed-stack 
          -msmall-exec  -mno-small-exec  -mmvcle  -mno-mvcle 
          -m64  -m31  -mdebug  -mno-debug  -mesa  -mzarch 
          -mhtm  -mvx  -mzvector 
          -mtpf-trace  -mno-tpf-trace  -mfused-madd  -mno-fused-madd 
          -mwarn-framesize  -mwarn-dynamicstack  -mstack-size  -mstack-guard 
          -mhotpatch=halfwords,halfwords

Score Options

          -meb  -mel 
          -mnhwloop 
          -muls 
          -mmac 
          -mscore5  -mscore5u  -mscore7  -mscore7d

SH Options

          -m1  -m2  -m2e 
          -m2a-nofpu  -m2a-single-only  -m2a-single  -m2a 
          -m3  -m3e 
          -m4-nofpu  -m4-single-only  -m4-single  -m4 
          -m4a-nofpu  -m4a-single-only  -m4a-single  -m4a  -m4al 
          -mb  -ml  -mdalign  -mrelax 
          -mbigtable  -mfmovd  -mrenesas  -mno-renesas  -mnomacsave 
          -mieee  -mno-ieee  -mbitops  -misize  -minline-ic_invalidate  -mpadstruct 
          -mprefergot  -musermode  -multcost=number  -mdiv=strategy 
          -mdivsi3_libfunc=name  -mfixed-range=register-range 
          -maccumulate-outgoing-args 
          -matomic-model=atomic-model 
          -mbranch-cost=num  -mzdcbranch  -mno-zdcbranch 
          -mcbranch-force-delay-slot 
          -mfused-madd  -mno-fused-madd  -mfsca  -mno-fsca  -mfsrra  -mno-fsrra 
          -mpretend-cmove  -mtas

Solaris 2 Options

          -mclear-hwcap  -mno-clear-hwcap  -mimpure-text  -mno-impure-text 
          -pthreads

SPARC Options

          -mcpu=cpu-type 
          -mtune=cpu-type 
          -mcmodel=code-model 
          -mmemory-model=mem-model 
          -m32  -m64  -mapp-regs  -mno-app-regs 
          -mfaster-structs  -mno-faster-structs  -mflat  -mno-flat 
          -mfpu  -mno-fpu  -mhard-float  -msoft-float 
          -mhard-quad-float  -msoft-quad-float 
          -mstack-bias  -mno-stack-bias 
          -mstd-struct-return  -mno-std-struct-return 
          -munaligned-doubles  -mno-unaligned-doubles 
          -muser-mode  -mno-user-mode 
          -mv8plus  -mno-v8plus  -mvis  -mno-vis 
          -mvis2  -mno-vis2  -mvis3  -mno-vis3 
          -mcbcond  -mno-cbcond  -mfmaf  -mno-fmaf  
          -mpopc  -mno-popc  -msubxc  -mno-subxc
          -mfix-at697f  -mfix-ut699 
          -mlra  -mno-lra

SPU Options

          -mwarn-reloc  -merror-reloc 
          -msafe-dma  -munsafe-dma 
          -mbranch-hints 
          -msmall-mem  -mlarge-mem  -mstdmain 
          -mfixed-range=register-range 
          -mea32  -mea64 
          -maddress-space-conversion  -mno-address-space-conversion 
          -mcache-size=cache-size 
          -matomic-updates  -mno-atomic-updates

System V Options

          -Qy  -Qn  -YP,paths  -Ym,dir

TILE-Gx Options

          -mcpu=CPU  -m32  -m64  -mbig-endian  -mlittle-endian 
          -mcmodel=code-model

TILEPro Options

          -mcpu=cpu  -m32

V850 Options

          -mlong-calls  -mno-long-calls  -mep  -mno-ep 
          -mprolog-function  -mno-prolog-function  -mspace 
          -mtda=n  -msda=n  -mzda=n 
          -mapp-regs  -mno-app-regs 
          -mdisable-callt  -mno-disable-callt 
          -mv850e2v3  -mv850e2  -mv850e1  -mv850es 
          -mv850e  -mv850  -mv850e3v5 
          -mloop 
          -mrelax 
          -mlong-jumps 
          -msoft-float 
          -mhard-float 
          -mgcc-abi 
          -mrh850-abi 
          -mbig-switch

VAX Options

          -mg  -mgnu  -munix

Visium Options

          -mdebug  -msim  -mfpu  -mno-fpu  -mhard-float  -msoft-float 
          -mcpu=cpu-type  -mtune=cpu-type  -msv-mode  -muser-mode

VMS Options

          -mvms-return-codes  -mdebug-main=prefix  -mmalloc64 
          -mpointer-size=size

VxWorks Options

          -mrtp  -non-static  -Bstatic  -Bdynamic 
          -Xbind-lazy  -Xbind-now

x86 Options

          -mtune=cpu-type  -march=cpu-type 
          -mtune-ctrl=feature-list  -mdump-tune-features  -mno-default 
          -mfpmath=unit 
          -masm=dialect  -mno-fancy-math-387 
          -mno-fp-ret-in-387  -m80387  -mhard-float  -msoft-float 
          -mno-wide-multiply  -mrtd  -malign-double 
          -mpreferred-stack-boundary=num 
          -mincoming-stack-boundary=num 
          -mcld  -mcx16  -msahf  -mmovbe  -mcrc32 
          -mrecip  -mrecip=opt 
          -mvzeroupper  -mprefer-avx128 
          -mmmx  -msse  -msse2  -msse3  -mssse3  -msse4.1  -msse4.2  -msse4  -mavx 
          -mavx2  -mavx512f  -mavx512pf  -mavx512er  -mavx512cd  -mavx512vl 
          -mavx512bw  -mavx512dq  -mavx512ifma  -mavx512vbmi  -msha  -maes 
          -mpclmul  -mfsgsbase  -mrdrnd  -mf16c  -mfma 
          -mprefetchwt1  -mclflushopt  -mxsavec  -mxsaves 
          -msse4a  -m3dnow  -mpopcnt  -mabm  -mbmi  -mtbm  -mfma4  -mxop  -mlzcnt 
          -mbmi2  -mfxsr  -mxsave  -mxsaveopt  -mrtm  -mlwp  -mmpx  -mmwaitx 
          -mclzero  -mpku  -mthreads 
          -mms-bitfields  -mno-align-stringops  -minline-all-stringops 
          -minline-stringops-dynamically  -mstringop-strategy=alg 
          -mmemcpy-strategy=strategy  -mmemset-strategy=strategy 
          -mpush-args  -maccumulate-outgoing-args  -m128bit-long-double 
          -m96bit-long-double  -mlong-double-64  -mlong-double-80  -mlong-double-128 
          -mregparm=num  -msseregparm 
          -mveclibabi=type  -mvect8-ret-in-mem 
          -mpc32  -mpc64  -mpc80  -mstackrealign 
          -momit-leaf-frame-pointer  -mno-red-zone  -mno-tls-direct-seg-refs 
          -mcmodel=code-model  -mabi=name  -maddress-mode=mode 
          -m32  -m64  -mx32  -m16  -miamcu  -mlarge-data-threshold=num 
          -msse2avx  -mfentry  -mrecord-mcount  -mnop-mcount  -m8bit-idiv 
          -mavx256-split-unaligned-load  -mavx256-split-unaligned-store 
          -malign-data=type  -mstack-protector-guard=guard 
          -mmitigate-rop  -mgeneral-regs-only

x86 Windows Options

          -mconsole  -mcygwin  -mno-cygwin  -mdll 
          -mnop-fun-dllimport  -mthread 
          -municode  -mwin32  -mwindows  -fno-set-stack-executable

Xstormy16 Options

          -msim

Xtensa Options

          -mconst16  -mno-const16 
          -mfused-madd  -mno-fused-madd 
          -mforce-no-pic 
          -mserialize-volatile  -mno-serialize-volatile 
          -mtext-section-literals  -mno-text-section-literals 
          -mauto-litpools  -mno-auto-litpools 
          -mtarget-align  -mno-target-align 
          -mlongcalls  -mno-longcalls

zSeries Options See S/390 and zSeries Options.