Contents|Index|Previous|Next Option summary  What follows is a summary of all the options, grouped by type. If the description for a particular option does not mention a source language, you can use that option with all supported languages. The gcc program accepts options and filenames as operands. Many options have multi-letter names; therefore, multiple single-letter options may not be grouped. You can mix options and other arguments. Order does matter when you use several options of the same kind; for example, if you specify ‘-L’ more than once, the directories are searched in the order specified. Many options have long names starting with ‘-f’ or with ‘-W’ (for example,  ‘-fstrength-reduce’ or ‘-Wformat’). Names often have positive and negative forms (the negative form of ‘-ffoo’ would be ‘-fno-foo’); this documentation generally discusses only one of the forms, whichever one not being default. For each list of options, see the corresponding documentation for more details. Options controlling the kind of output Compiling C programs Options controlling C dialect Options that control C++ dialect Options to request or suppresss warnings Options for debugging your program or GNU CC Options that control optimization Options controlling the preprocessor Passing options tothe assembler Options for linking Options for directory search Specifying target machine and compiler version Hardware models and configurations AMD29K options ARC options ARM options ARM Thumb options Clipper options Convex options DEC Alpha options Hitachi H8/300 options Hitachi SH options HPPA options IBM PowerPC options IBM RS/6000  options IBM RT options Intel x86 options Intel 960 options Matsushita MN10200 options Matsushita MN10300 options MIPS options Mitsubishi D10V options Mitsubishi M32R/D/X options Motorola 68K options Motorola 88K options NEC V850 options SPARC options System V options VAX options Zilog options Options for code generation conventions The offset-info option Overall options See Options controlling the kind of output. -c  -S  -E  -o file  -pipe  -v  -x   language   C Language options See Options controlling C dialect. -ansi  -flagng-isoc9x  -fallow-single-precision -fcond-mismatch  -fno-asm -fno-builtin  -ffreestanding -fhosted -fsigned-bitfields  -fsigned-char -funsigned-bitfields  -funsigned-char  -fwritable-strings  -traditional  -traditional-cpp   -trigraphs   C++ Language options See Options that control C++ dialect. -fno-access-control  -fall-virtual  -fdollars-in-identifiers -felide-constructors  -fenum-int-equiv  -fexternal-templates  -ffor-scope  -fno-for-scope  -fhandle-signatures -fmemoize-lookups -fname-mangling-version-n -fno-default-inline  -fno-gnu-keywords  -fnonnull-objects  -fguiding-decls -foperator-names -fstrict-prototype -fthis-is-variable -ftemplate-depth-n -nostdinc++ -traditional   Warning options See Options to request or suppress warnings. -fsyntax-only -pedantic -pedantic-errors -w -W -Wall  -Waggregate-return -Wbad-function-cast -Wcast-align  -Wcast-qual -Wchar-subscript –Wcomment -Wconversion  -Werror -Wformat -Wid-clash-len -Wimplicit -Wimplicit-int -Wimplicit-function-declarations  -Wimport -Winline  -Wlarger-than-len -Wmain -Wmissing-declarations  -Wmissing-prototypes -Wnested-externs -Wno-import -Wold-style-cast  -Woverloaded-virtual -Wparentheses -Wpointer-arith -Wredundant-decls -Wreorder -Wreturn-type -Wshadow -Wsign-compare -Wstrict-prototypes -Wswitch –Wsynth -Wtemplate-debugging -Wtraditional –Wtrigraphs -Wundef -Wuninitialized -Wunused -Wwrite-strings -Wunknown-pragmas   Debugging options See Options for debugging your program or GCC. -a  -ax  -dletters  -fpretend-float  -fprofile-arcs -ftest-coverage  -g  -glevel  -gcoff -gdwarf -gdwarf-1   -gdwarf+1  -gdwarf-2  -ggdb  -gstabs  -gstabs+  -gxcoff  -gxcoff+  -p   -pg  -print-file-name=library  -print-libgcc-file-name  -print-prog-name=program   -print-search-dirs  -save-temps   Optimization options See Options that control optimization. -fbranch-probabilities -fcaller-saves  -fcse-follow-jumps -fcse-skip-blocks   -fdelayed-branch -fexpensive-optimizations -ffast-math  -ffloat-store  -fforce-addr  -fforce-mem -ffunction-sections  -finline-functions -fkeep-inline-functions  -fno-default-inline -fno-defer-pop  -fno-function-cse  -fno-inline -fno-peephole  -fomit-frame-pointer  -fregmove -frerun-cse-after-loop  -frerun-loop-opt -fschedule-insns -fschedule-insns2  -fshorten-lifetimes -fstrength-reduce  -fthread-jumps  -funroll-all-loops  -funroll-loops -fgcse -fmove-all-variables -freduce-all-givs -O  -O0  -O1  -O2 -O3 Os   Preprocessor options See Options controlling the preprocessor. -Aquestion(answer) -C -dD   -dM   -dN   -Dmacro[=defn] -E  -H   -idirafter dir   -include file   -imacros file -iprefix file -iwithprefix dir -iwithprefixbefore dir -isystem  dir  -M  -MD  -MM  -MMD  -MG  -nostdinc -P -trigraphs  -undef   -Umacro    -Wp, option   Assembler option See Passing options to the assembler. -Wa, option   Linker options See Options for linking. object-file-name  -llibrary -nostartfiles   -nodefaultlibs   -nostdlib -s   -static   -shared   -symbolic -Wl,option   -Xlinker option -u symbol   Directory options See Options for directory search. -Bprefix    -Idir   -I-   -Ldir  -specs=file   Target options See Specifying target machine and compiler version. -bmachine   -Vversion   Machine dependent options See Hardware models and configurations. AMD29K options (see AMD29K options) -m29000 -m29050 -mbw -mnbw -mdw -mndw -mlarge -mnormal -msmall -mkernel-registers -mno-reuse-arg-regs -mno-stack-check -mno-storem-bug -mreuse-arg-regs -msoft-float -mstack-check -mstorem-bug -muser-registers ARC options (see ARC options) -EB –EL –mmangle-cpu–mcpu=cpu –mtext=text section –mdata=data section –mrodata=readonly data section ARM options (see ARM options) -mapcs-frame -mno-apcs-frame -mapcs-26 -mapcs-32 -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 -mshort-load-bytes -mno-short-load-bytes -mshort-load-words  -mno-short-load -msoft-float -mhard-float -mfpe -mthumb-interwork -mno-thumb-interwork  -mcpu= -march= -mfpe= -mstructure-size-boundary= -mbsd -mxopen -mno-symrename -mnop-fun-dllimport -mno-nop-fun-dllimport ARM Thumb options (see ARM Thumb options) -mtpcs-frame -mno-tpcs-frame  -mtpcs-leaf-frame -mno-tpcs-leaf-frame  -mlittle-endian -mbig-endian -mthumb-interwork -mno-thumb-interwork -mstructure-size-boundary=  -mnop-fun-dllimport -mno-nop-fun-dllimport  -mcallee-super-interworking -m-callee-super-interworking  -mcaller-super-interworking -mno-caller-super-interworking Clipper options (see Clipper options) -mc300 -mc400 Convex options (see Convex options) -mc1 -mc2 -mc32 -mc34 -mc38 -margcount -mnoargcount -mlong32 -mlong64 -mvolatile-cache -mvolatile-nocache DEC Alpha options (see DEC Alpha options) -mfp-regs -mno-fp-regs -mno-soft-float  -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 -mbwx -mno-bwx -mcix -mno-cix -mmax -mno-max -mmemory-latency=time Hitachi H8/300 options (see H8/300 options) -mrelax -mh -ms -mint32 -malign-300 Hitachi SH options (see SH options) -m1  -m2  -m3  -mb  -ml  -mrelax HPPA options (see HPPA options) -mbig-switch -mdisable-fpregs -mdisable-indexing -mfast-indirect-calls  -mgas -mjump-in-delay -mlong-load-store –mno-big-switch -mno-disable-fpregs -mno-disable-indexing  -mfast-indirect-calls  -mno-gas -mno-jump-in-delay  -mno-long-load-store -mno-portable-runtime -mno-soft-float  -mno-space -mno-space-regs -msoft-float -mpa-risc-1-0 -mpa-risc-1-1 -mportable-runtime -mschedule=list -mspace -mspace-regs IBM RS/6000 and PowerPC 0ptions (see IBM RS/6000 and PowerPC options) -mcpu=cpu type -mtune=cputype -mpower -mno-power -mpower2 -mno-power2 -mpowerpc -mno-powerpc -mpowerpc-gpopt -mno-powerpc-gpopt -mpowerpc-gfxopt -mno-powerpc-gfxopt -mnew-mnemonics -mno-new-mnemonics -mfull-toc -mminimal-toc -mno-fop-in-toc -mno-sum-in-toc -mxl-call -mno-xl-call  -mthreads  -mpe -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 -mtraceback -mno-traceback -mlittle -mlittle-endian -mbig -mbig-endian -mcall-aix -mcall-sysv -mprototype -mno-prototype -msim -mmvme -memb –mads –myellowknife -msdata  -msdata=opt -G num IBM RT options (see IBM RT options) -mcall-lib-mul -mfp-arg-in-fpregs -mfp-arg-in-gregs -mfull-fp-blocks -mhc-struct-return -min-line-mul -mminimum-fp-blocks -mnohc-struct-return Intel 386 options (see Intel 386 options) -mcpu=cpu type  -march=cpu type -mieee-fp -mno-fancy-math-387 -mno-fp-ret-in-387 -msoft-float -msvr3-shlib -mno-wide-multiply -mrtd -malign-double -mreg-alloc=list -mregparm=num -malign-jumps=num -malign-loops=num -malign-functions=num Intel 960 options (see Intel 960 options) -mcpu type -masm-compat -mclean-linkage -mcode-align -mcomplex-addr -mleaf-procedures -mic-compat -mic2.0-compat -mic3.0-compat -mintel-asm -mno-clean-linkage -mno-code-align -mno-complex-addr -mno-leaf-procedures -mno-old-align -mno-strict-align -mno-tail-call -mnumerics -mold-align -msoft-float -mstrict-align -mtail-call Matsushita MN10300 options (see MN10200 options) -mrelax Matsushita MN10300 options (see MN10300 options) -mmult-bug  -mno-mult-bug -mrelax MIPS options (see MIPS options) -mabicalls -mcpu=cpu type -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 -G num -nocpp Mitsubishi D10V options (see D10V options) -mint16 -mint32 -maddac3 -mno-addac3  -mdouble32 -mdouble64  -maccum -mno-accum -msim  -masm-optimize -mno-asm-optimize -msmall-insns -mno-small-insns -mbranch-cost=n -mcond-exec=n -mno-cond-move  -mcond-move Mitsubishi M32R/D/X options (see M32R/D/X options) -mcode-model=small -mcode-model=medium -mcode-model=large -msdata=none –msdata=sdata –msdata=use –G num Motorola 68K options (see M68K options) -m68000  -m68020  -m68020-40 –m68020-60 -m68030 -m68040  -m68060  -mcpu32 -m5200 -m68881  -mbitfield -mc68000 -mc68020 -mnobitfield  -mrtd -mshort -msoft-float –malign-int Motorola 88K options (see M88K options) -m88000 -m88100 -m88110 -mbig-pic -mcheck-zero-division -mhandle-large-shift -midentify-revision -mno-check-zero-division -mno-ocs-debug-info -mno-ocs-frame-position -mno-optimize-arg-area -mno-serialize-volatile -mno-underscores -mocs-debug-info -mocs-frame-position -moptimize-arg-area -mserialize-volatile -mshort-data-num -msvr3 -msvr4 -mtrap-large-shift -muse-div-instruction -mversion-03.00 -mwarn-passed-structs NEC V850 options (see NEC V850 options) -mlong-calls -mno-long-calls -mep -mno-ep -mprolog-function -mno-prolog-function -mspace -mtda=n -msda=n -mzda=n -mv850 -mbig-switch -mapp-regs -mno-app-regs SPARC options (see SPARC options) -mcpu=cpu type   -mtune=cpu type -mcmodel=code model -malign-jumps=num -malign-loops=num -malign-functions=num -m32 -m64 -mapp-regs -mno-app-regs -mbroken-saverestore  -mcypress -mepilogue -mno-epilogue -mflat -mno-flat -mfpu -hmno-fpu -mhard-float  -mhard-quad-float -mimpure-text -mliveg0 -mno-impure-text  -mno-stack-bias -mno-unaligned-doubles  -msoft-float  -msoft-quad-float -msparclite  -mstack-bias  -msupersparc -munaligned-doubles -mv8 System V options (see System V options) -Qy -Qn -YP,paths -Ym,dir VAX options (see VAX options) -mg -mgnu -munix Zilog option -mz8001 Generate code for the segmented variant of the Z8000 architecture. (Without this option, gcc generates unsegmented Z8000 code suitable, for example, for the Z8002.) Code generation options See Options for code generation conventions. -fcall-saved-reg -fcall-used-reg -fexceptions  -ffixed-reg -finhibit-size-directive –fcheck-memory-usage -fprefix-function-name -fno-common -fno-ident -fno-gnu-linker -fpcc-struct-return -fpic -fPIC -freg-struct-return -fshared-data -fshort-enums -fshort-double –fvolatile -fvolatile-global -funaligned-pointers -funaligned-struct-hack -fverbose-asm -fpack-struct –fstack-check +e0 +e1 -fargument-alias -fargument-noalias -fargument-noalias-global Top|Contents|Index|Previous|Next <