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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  -combine  -pipe  -pass-exit-codes  
          -x language  -v  -###  --help[=class]  --target-help  
          --version @file

C Language Options
See Options Controlling C Dialect. 
          -ansi  -std=standard  -fgnu89-inline 
          -aux-info filename 
          -fno-asm  -fno-builtin  -fno-builtin-function 
          -fhosted  -ffreestanding -fopenmp -fms-extensions 
          -trigraphs  -no-integrated-cpp  -traditional  -traditional-cpp 
          -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  -fcheck-new 
          -fconserve-space  -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 
          -fno-nonansi-builtins  -fno-operator-names 
          -fno-optional-diags  -fpermissive 
          -frepo  -fno-rtti  -fstats  -ftemplate-depth-n 
          -fno-threadsafe-statics -fuse-cxa-atexit  -fno-weak  -nostdinc++ 
          -fno-default-inline  -fvisibility-inlines-hidden 
          -fvisibility-ms-compat 
          -Wabi  -Wctor-dtor-privacy 
          -Wnon-virtual-dtor  -Wreorder 
          -Weffc++  -Wno-deprecated  -Wstrict-null-sentinel 
          -Wno-non-template-friend  -Wold-style-cast 
          -Woverloaded-virtual  -Wno-pmf-conversions 
          -Wsign-promo

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-call-cxx-cdtors 
          -fobjc-direct-dispatch 
          -fobjc-exceptions 
          -fobjc-gc 
          -freplace-objc-classes 
          -fzero-link 
          -gen-decls 
          -Wassign-intercept 
          -Wno-protocol  -Wselector 
          -Wstrict-selector-match 
          -Wundeclared-selector

Language Independent Options
See Options to Control Diagnostic Messages Formatting. 
          -fmessage-length=n  
          -fdiagnostics-show-location=[once|every-line]  
          -fdiagnostics-show-option

Warning Options
See Options to Request or Suppress Warnings. 
          -fsyntax-only  -pedantic  -pedantic-errors 
          -w  -Wextra  -Wall  -Waddress  -Waggregate-return  -Warray-bounds 
          -Wno-attributes -Wc++-compat -Wc++0x-compat -Wcast-align  -Wcast-qual  
          -Wchar-subscripts -Wclobbered  -Wcomment 
          -Wconversion  -Wcoverage-mismatch  -Wno-deprecated-declarations 
          -Wdisabled-optimization  -Wno-div-by-zero  
          -Wempty-body  -Wno-endif-labels 
          -Werror  -Werror=* 
          -Wfatal-errors  -Wfloat-equal  -Wformat  -Wformat=2 
          -Wno-format-extra-args -Wformat-nonliteral 
          -Wformat-security  -Wformat-y2k -Wignored-qualifiers 
          -Wimplicit  -Wimplicit-function-declaration  -Wimplicit-int 
          -Wimport  -Wno-import  -Winit-self  -Winline 
          -Wno-int-to-pointer-cast -Wno-invalid-offsetof 
          -Winvalid-pch -Wlarger-than-len  -Wunsafe-loop-optimizations 
          -Wlogical-op -Wlong-long 
          -Wmain  -Wmissing-braces  -Wmissing-field-initializers 
          -Wmissing-format-attribute  -Wmissing-include-dirs 
          -Wmissing-noreturn 
          -Wno-multichar  -Wnonnull  -Wno-overflow 
          -Woverlength-strings  -Wpacked  -Wpadded 
          -Wparentheses  -Wpointer-arith  -Wno-pointer-to-int-cast 
          -Wredundant-decls 
          -Wreturn-type  -Wsequence-point  -Wshadow 
          -Wsign-compare  -Wsign-conversion  -Wstack-protector 
          -Wstrict-aliasing -Wstrict-aliasing=n 
          -Wstrict-overflow -Wstrict-overflow=n 
          -Wswitch  -Wswitch-default  -Wswitch-enum 
          -Wsystem-headers  -Wtrigraphs  -Wtype-limits  -Wundef  -Wuninitialized 
          -Wunknown-pragmas  -Wno-pragmas -Wunreachable-code 
          -Wunused  -Wunused-function  -Wunused-label  -Wunused-parameter 
          -Wunused-value  -Wunused-variable 
          -Wvariadic-macros -Wvla 
          -Wvolatile-register-var  -Wwrite-strings

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 or GCC. 
          -dletters  -dumpspecs  -dumpmachine  -dumpversion 
          -fdbg-cnt-list -fdbg-cnt=counter-value-list 
          -fdump-noaddr -fdump-unnumbered  -fdump-translation-unit[-n] 
          -fdump-class-hierarchy[-n] 
          -fdump-ipa-all -fdump-ipa-cgraph -fdump-ipa-inline 
          -fdump-tree-all 
          -fdump-tree-original[-n]  
          -fdump-tree-optimized[-n] 
          -fdump-tree-cfg -fdump-tree-vcg -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-mudflap[-n] 
          -fdump-tree-dom[-n] 
          -fdump-tree-dse[-n] 
          -fdump-tree-phiopt[-n] 
          -fdump-tree-forwprop[-n] 
          -fdump-tree-copyrename[-n] 
          -fdump-tree-nrv -fdump-tree-vect 
          -fdump-tree-sink 
          -fdump-tree-sra[-n] 
          -fdump-tree-salias 
          -fdump-tree-fre[-n] 
          -fdump-tree-vrp[-n] 
          -ftree-vectorizer-verbose=n 
          -fdump-tree-storeccp[-n] 
          -feliminate-dwarf2-dups -feliminate-unused-debug-types 
          -feliminate-unused-debug-symbols -femit-class-debug-always 
          -fmem-report -fpre-ipa-mem-report -fpost-ipa-mem-report -fprofile-arcs 
          -frandom-seed=string -fsched-verbose=n 
          -ftest-coverage  -ftime-report -fvar-tracking 
          -g  -glevel  -gcoff -gdwarf-2 
          -ggdb  -gstabs  -gstabs+  -gvms  -gxcoff  -gxcoff+ 
          -fno-merge-debug-strings -fdebug-prefix-map=old=new 
          -femit-struct-debug-baseonly -femit-struct-debug-reduced 
          -femit-struct-debug-detailed[=spec-list] 
          -p  -pg  -print-file-name=library  -print-libgcc-file-name 
          -print-multi-directory  -print-multi-lib 
          -print-prog-name=program  -print-search-dirs  -Q 
          -print-sysroot-headers-suffix 
          -save-temps  -time

Optimization Options
See Options that Control Optimization. 
          -falign-functions[=n] -falign-jumps[=n] 
          -falign-labels[=n] -falign-loops[=n] -fassociative-math 
          -fauto-inc-dec -fbranch-probabilities -fbranch-target-load-optimize 
          -fbranch-target-load-optimize2 -fbtr-bb-exclusive -fcaller-saves 
          -fcheck-data-deps -fcprop-registers -fcrossjumping -fcse-follow-jumps 
          -fcse-skip-blocks -fcx-limited-range -fdata-sections -fdce -fdce 
          -fdelayed-branch -fdelete-null-pointer-checks -fdse -fdse 
          -fearly-inlining -fexpensive-optimizations -ffast-math 
          -ffinite-math-only -ffloat-store -fforward-propagate 
          -ffunction-sections -fgcse -fgcse-after-reload -fgcse-las -fgcse-lm 
          -fgcse-sm -fif-conversion -fif-conversion2 -finline-functions 
          -finline-functions-called-once -finline-limit=n 
          -finline-small-functions -fipa-cp -fipa-marix-reorg -fipa-pta 
          -fipa-pure-const -fipa-reference -fipa-struct-reorg 
          -fipa-type-escape -fivopts -fkeep-inline-functions -fkeep-static-consts 
          -fmerge-all-constants -fmerge-constants -fmodulo-sched 
          -fmodulo-sched-allow-regmoves -fmove-loop-invariants -fmudflap 
          -fmudflapir -fmudflapth -fno-branch-count-reg -fno-default-inline 
          -fno-defer-pop -fno-function-cse -fno-guess-branch-probability 
          -fno-inline -fno-math-errno -fno-peephole -fno-peephole2 
          -fno-sched-interblock -fno-sched-spec -fno-signed-zeros 
          -fno-toplevel-reorder -fno-trapping-math -fno-zero-initialized-in-bss 
          -fomit-frame-pointer -foptimize-register-move -foptimize-sibling-calls 
          -fpeel-loops -fpredictive-commoning -fprefetch-loop-arrays 
          -fprofile-generate -fprofile-use -fprofile-values -freciprocal-math 
          -fregmove -frename-registers -freorder-blocks 
          -freorder-blocks-and-partition -freorder-functions 
          -frerun-cse-after-loop -freschedule-modulo-scheduled-loops 
          -frounding-math -frtl-abstract-sequences -fsched2-use-superblocks 
          -fsched2-use-traces -fsched-spec-load -fsched-spec-load-dangerous 
          -fsched-stalled-insns-dep[=n] -fsched-stalled-insns[=n] 
          -fschedule-insns -fschedule-insns2 -fsection-anchors -fsee 
          -fsignaling-nans -fsingle-precision-constant -fsplit-ivs-in-unroller 
          -fsplit-wide-types -fstack-protector -fstack-protector-all 
          -fstrict-aliasing -fstrict-overflow -fthread-jumps -ftracer -ftree-ccp 
          -ftree-ch -ftree-copy-prop -ftree-copyrename -ftree-dce 
          -ftree-dominator-opts -ftree-dse -ftree-fre -ftree-loop-im 
          -ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize 
          -ftree-parallelize-loops=n -ftree-pre -ftree-reassoc -ftree-salias 
          -ftree-sink -ftree-sra -ftree-store-ccp -ftree-ter 
          -ftree-vect-loop-version -ftree-vectorize -ftree-vrp -funit-at-a-time 
          -funroll-all-loops -funroll-loops -funsafe-loop-optimizations 
          -funsafe-math-optimizations -funswitch-loops 
          -fvariable-expansion-in-unroller -fvect-cost-model -fvpt -fweb 
          -fwhole-program 
          --param name=value
          -O  -O0  -O1  -O2  -O3  -Os

Preprocessor Options
See Options Controlling the Preprocessor. 
          -Aquestion=answer 
          -A-question[=answer] 
          -C  -dD  -dI  -dM  -dN 
          -Dmacro[=defn]  -E  -H 
          -idirafter dir 
          -include file  -imacros file 
          -iprefix file  -iwithprefix dir 
          -iwithprefixbefore dir  -isystem dir 
          -imultilib dir -isysroot dir 
          -M  -MM  -MF  -MG  -MP  -MQ  -MT  -nostdinc  
          -P  -fworking-directory  -remap 
          -trigraphs  -undef  -Umacro  -Wp,option 
          -Xpreprocessor option

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

Linker Options
See Options for Linking. 
          object-file-name  -llibrary 
          -nostartfiles  -nodefaultlibs  -nostdlib -pie -rdynamic 
          -s  -static  -static-libgcc  -shared  -shared-libgcc  -symbolic 
          -Wl,option  -Xlinker option 
          -u symbol

Directory Options
See Options for Directory Search. 
          -Bprefix  -Idir  -iquotedir  -Ldir
          -specs=file  -I- --sysroot=dir

Target Options
See Target Options. 
          -V version  -b machine

Machine Dependent Options
See Hardware Models and Configurations.

ARC Options 

          -EB  -EL 
          -mmangle-cpu  -mcpu=cpu  -mtext=text-section 
          -mdata=data-section  -mrodata=readonly-data-section

ARM Options 

          -mapcs-frame  -mno-apcs-frame 
          -mabi=name 
          -mapcs-stack-check  -mno-apcs-stack-check 
          -mapcs-float  -mno-apcs-float 
          -mapcs-reentrant  -mno-apcs-reentrant 
          -msched-prolog  -mno-sched-prolog 
          -mlittle-endian  -mbig-endian  -mwords-little-endian 
          -mfloat-abi=name  -msoft-float  -mhard-float  -mfpe 
          -mthumb-interwork  -mno-thumb-interwork 
          -mcpu=name  -march=name  -mfpu=name  
          -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 
          -mcirrus-fix-invalid-insns -mno-cirrus-fix-invalid-insns 
          -mpoke-function-name 
          -mthumb  -marm 
          -mtpcs-frame  -mtpcs-leaf-frame 
          -mcaller-super-interworking  -mcallee-super-interworking 
          -mtp=name

AVR Options 

          -mmcu=mcu  -msize  -minit-stack=n  -mno-interrupts 
          -mcall-prologues  -mno-tablejump  -mtiny-stack  -mint8

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

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

CRX Options 

          -mmac -mpush-args

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  -malpha-as  -mgas 
          -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

DEC Alpha/VMS Options 

          -mvms-return-codes

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 

          -muclibc

H8/300 Options 

          -mrelax  -mh  -ms  -mn  -mint32  -malign-300

HPPA Options 

          -march=architecture-type 
          -mbig-switch  -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-big-switch  -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

i386 and x86-64 Options 

          -mtune=cpu-type  -march=cpu-type 
          -mfpmath=unit 
          -masm=dialect  -mno-fancy-math-387 
          -mno-fp-ret-in-387  -msoft-float 
          -mno-wide-multiply  -mrtd  -malign-double 
          -mpreferred-stack-boundary=num -mcx16 -msahf -mrecip 
          -mmmx  -msse  -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 
          -msse4a -m3dnow -mpopcnt -mabm -msse5 
          -mthreads  -mno-align-stringops  -minline-all-stringops 
          -mpush-args  -maccumulate-outgoing-args  -m128bit-long-double 
          -m96bit-long-double  -mregparm=num  -msseregparm 
          -mveclibabi=type -mpc32 -mpc64 -mpc80 -mstackrealign 
          -momit-leaf-frame-pointer  -mno-red-zone -mno-tls-direct-seg-refs 
          -mcmodel=code-model 
          -m32  -m64 -mlarge-data-threshold=num 
          -mfused-madd -mno-fused-madd

IA-64 Options 

          -mbig-endian  -mlittle-endian  -mgnu-as  -mgnu-ld  -mno-pic 
          -mvolatile-asm-stop  -mregister-names  -mno-sdata 
          -mconstant-gp  -mauto-pic  -minline-float-divide-min-latency 
          -minline-float-divide-max-throughput 
          -minline-int-divide-min-latency 
          -minline-int-divide-max-throughput  
          -minline-sqrt-min-latency -minline-sqrt-max-throughput 
          -mno-dwarf2-asm -mearly-stop-bits 
          -mfixed-range=register-range -mtls-size=tls-size 
          -mtune=cpu-type -mt -pthread -milp32 -mlp64 
          -mno-sched-br-data-spec -msched-ar-data-spec -mno-sched-control-spec 
          -msched-br-in-data-spec -msched-ar-in-data-spec -msched-in-control-spec 
          -msched-ldc -mno-sched-control-ldc -mno-sched-spec-verbose 
          -mno-sched-prefer-non-data-spec-insns 
          -mno-sched-prefer-non-control-spec-insns 
          -mno-sched-count-spec-in-critical-path

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

M68hc1x Options 

          -m6811  -m6812  -m68hc11  -m68hc12   -m68hcs12 
          -mauto-incdec  -minmax  -mlong-calls  -mshort 
          -msoft-reg-count=count

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

MIPS Options 

          -EL  -EB  -march=arch  -mtune=arch 
          -mips1  -mips2  -mips3  -mips4  -mips32  -mips32r2  -mips64 
          -mips16  -mno-mips16  -mflip-mips16 
          -minterlink-mips16  -mno-interlink-mips16 
          -mabi=abi  -mabicalls  -mno-abicalls 
          -mshared  -mno-shared  -mxgot  -mno-xgot  -mgp32  -mgp64 
          -mfp32  -mfp64  -mhard-float  -msoft-float 
          -msingle-float  -mdouble-float  -mdsp  -mno-dsp  -mdspr2  -mno-dspr2 
          -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  -mfused-madd  -mno-fused-madd  -nocpp 
          -mfix-r4000  -mno-fix-r4000  -mfix-r4400  -mno-fix-r4400 
          -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 
          -mfp-exceptions -mno-fp-exceptions 
          -mvr4130-align -mno-vr4130-align

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 
          -mam33  -mno-am33 
          -mam33-2  -mno-am33-2 
          -mreturn-pointer-on-d0 
          -mno-crt0  -mrelax

MT Options 

          -mno-crt0 -mbacc -msim 
          -march=cpu-type

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 
          -msplit  -mno-split  -munix-asm  -mdec-asm

PowerPC Options See RS/6000 and PowerPC Options.

RS/6000 and PowerPC Options 

          -mcpu=cpu-type 
          -mtune=cpu-type 
          -mpower  -mno-power  -mpower2  -mno-power2 
          -mpowerpc  -mpowerpc64  -mno-powerpc 
          -maltivec  -mno-altivec 
          -mpowerpc-gpopt  -mno-powerpc-gpopt 
          -mpowerpc-gfxopt  -mno-powerpc-gfxopt 
          -mmfcrf  -mno-mfcrf  -mpopcntb  -mno-popcntb  -mfprnd  -mno-fprnd 
          -mcmpb -mno-cmpb -mmfpgpr -mno-mfpgpr -mhard-dfp -mno-hard-dfp 
          -mnew-mnemonics  -mold-mnemonics 
          -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 
          -mstring  -mno-string  -mupdate  -mno-update 
          -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 
          -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 
          -misel -mno-isel 
          -misel=yes  -misel=no 
          -mspe -mno-spe 
          -mspe=yes  -mspe=no 
          -mpaired 
          -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  -mwindiss  -G num  -pthread

S/390 and zSeries Options 

          -mtune=cpu-type  -march=cpu-type 
          -mhard-float  -msoft-float -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 
          -mtpf-trace -mno-tpf-trace  -mfused-madd  -mno-fused-madd 
          -mwarn-framesize  -mwarn-dynamicstack  -mstack-size -mstack-guard

Score Options 

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

SH Options 

          -m1  -m2  -m2e  -m3  -m3e 
          -m4-nofpu  -m4-single-only  -m4-single  -m4 
          -m4a-nofpu -m4a-single-only -m4a-single -m4a -m4al 
          -m5-64media  -m5-64media-nofpu 
          -m5-32media  -m5-32media-nofpu 
          -m5-compact  -m5-compact-nofpu 
          -mb  -ml  -mdalign  -mrelax 
          -mbigtable  -mfmovd  -mhitachi -mrenesas -mno-renesas -mnomacsave 
          -mieee  -misize  -minline-ic_invalidate -mpadstruct  -mspace 
          -mprefergot  -musermode -multcost=number -mdiv=strategy 
          -mdivsi3_libfunc=name  
          -madjust-unroll -mindexed-addressing -mgettrcost=number -mpt-fixed 
           -minvalid-symbols

SPARC Options 

          -mcpu=cpu-type 
          -mtune=cpu-type 
          -mcmodel=code-model 
          -m32  -m64  -mapp-regs  -mno-app-regs 
          -mfaster-structs  -mno-faster-structs 
          -mfpu  -mno-fpu  -mhard-float  -msoft-float 
          -mhard-quad-float  -msoft-quad-float 
          -mimpure-text  -mno-impure-text  -mlittle-endian 
          -mstack-bias  -mno-stack-bias 
          -munaligned-doubles  -mno-unaligned-doubles 
          -mv8plus  -mno-v8plus  -mvis  -mno-vis
          -threads -pthreads -pthread

SPU Options 

          -mwarn-reloc -merror-reloc 
          -msafe-dma -munsafe-dma 
          -mbranch-hints 
          -msmall-mem -mlarge-mem -mstdmain 
          -mfixed-range=register-range

System V Options 

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

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 
          -mv850e1 
          -mv850e 
          -mv850  -mbig-switch

VAX Options 

          -mg  -mgnu  -munix

VxWorks Options 

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

x86-64 Options See i386 and x86-64 Options.

Xstormy16 Options 

          -msim

Xtensa Options 

          -mconst16 -mno-const16 
          -mfused-madd  -mno-fused-madd 
          -mtext-section-literals  -mno-text-section-literals 
          -mtarget-align  -mno-target-align 
          -mlongcalls  -mno-longcalls

zSeries Options See S/390 and zSeries Options.

Code Generation Options
See Options for Code Generation Conventions. 
          -fcall-saved-reg  -fcall-used-reg 
          -ffixed-reg  -fexceptions 
          -fnon-call-exceptions  -funwind-tables 
          -fasynchronous-unwind-tables 
          -finhibit-size-directive  -finstrument-functions 
          -finstrument-functions-exclude-function-list=sym,sym,... 
          -finstrument-functions-exclude-file-list=file,file,... 
          -fno-common  -fno-ident 
          -fpcc-struct-return  -fpic  -fPIC -fpie -fPIE 
          -fno-jump-tables 
          -frecord-gcc-switches 
          -freg-struct-return  -fshort-enums 
          -fshort-double  -fshort-wchar 
          -fverbose-asm  -fpack-struct[=n]  -fstack-check 
          -fstack-limit-register=reg  -fstack-limit-symbol=sym 
          -fno-stack-limit  -fargument-alias  -fargument-noalias 
          -fargument-noalias-global  -fargument-noalias-anything 
          -fleading-underscore  -ftls-model=model 
          -ftrapv  -fwrapv  -fbounds-check 
          -fvisibility