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<html lang="en"><head><title>Using the GNU Compiler Collection (GCC)</title><meta http-equiv="Content-Type" content="text/html"><meta name="description" content="Using the GNU Compiler Collection (GCC)"><meta name="generator" content="makeinfo 4.6"><!--Copyright © 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. <p>Permission is granted to copy, distribute and/or modify this documentunder the terms of the GNU Free Documentation License, Version 1.2 orany later version published by the Free Software Foundation; with theInvariant Sections being "GNU General Public License" and "FundingFree Software", the Front-Cover texts being (a) (see below), and withthe Back-Cover Texts being (b) (see below). A copy of the license isincluded in the section entitled "GNU Free Documentation License". <p>(a) The FSF's Front-Cover Text is: <p>A GNU Manual <p>(b) The FSF's Back-Cover Text is: <p>You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.--><meta http-equiv="Content-Style-Type" content="text/css"><style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller }--></style></head><body><div class="node"><p>Node: <a name="Option%20Summary">Option Summary</a>,Next: <a rel="next" accesskey="n" href="Overall-Options.html#Overall%20Options">Overall Options</a>,Up: <a rel="up" accesskey="u" href="Invoking-GCC.html#Invoking%20GCC">Invoking GCC</a><hr><br></div><h3 class="section">Option Summary</h3><p>Here is a summary of all the options, grouped by type. Explanations arein the following sections. <dl><dt><em>Overall Options</em> <dd>See <a href="Overall-Options.html#Overall%20Options">Options Controlling the Kind of Output</a>. <pre class="smallexample"> -c -S -E -o <var>file</var> -combine -pipe -pass-exit-codes -x <var>language</var> -v -### --help --target-help --version </pre> <br><dt><em>C Language Options</em> <dd>See <a href="C-Dialect-Options.html#C%20Dialect%20Options">Options Controlling C Dialect</a>. <pre class="smallexample"> -ansi -std=<var>standard</var> -aux-info <var>filename</var> -fno-asm -fno-builtin -fno-builtin-<var>function</var> -fhosted -ffreestanding -fms-extensions -trigraphs -no-integrated-cpp -traditional -traditional-cpp -fallow-single-precision -fcond-mismatch -fsigned-bitfields -fsigned-char -funsigned-bitfields -funsigned-char </pre> <br><dt><em>C++ Language Options</em> <dd>See <a href="C---Dialect-Options.html#C++%20Dialect%20Options">Options Controlling C++ Dialect</a>. <pre class="smallexample"> -fabi-version=<var>n</var> -fno-access-control -fcheck-new -fconserve-space -fno-const-strings -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-<var>n</var> -fuse-cxa-atexit -fno-weak -nostdinc++ -fno-default-inline -Wabi -Wctor-dtor-privacy -Wnon-virtual-dtor -Wreorder -Weffc++ -Wno-deprecated -Wno-non-template-friend -Wold-style-cast -Woverloaded-virtual -Wno-pmf-conversions -Wsign-promo -Wsynth </pre> <br><dt><em>Objective-C Language Options</em> <dd>See <a href="Objective-C-Dialect-Options.html#Objective-C%20Dialect%20Options">Options Controlling Objective-C Dialect</a>. <pre class="smallexample"> -fconstant-string-class=<var>class-name</var> -fgnu-runtime -fnext-runtime -fno-nil-receivers -fobjc-exceptions -freplace-objc-classes -fzero-link -gen-decls -Wno-protocol -Wselector -Wundeclared-selector </pre> <br><dt><em>Language Independent Options</em> <dd>See <a href="Language-Independent-Options.html#Language%20Independent%20Options">Options to Control Diagnostic Messages Formatting</a>. <pre class="smallexample"> -fmessage-length=<var>n</var> -fdiagnostics-show-location=[once|every-line] </pre> <br><dt><em>Warning Options</em> <dd>See <a href="Warning-Options.html#Warning%20Options">Options to Request or Suppress Warnings</a>. <pre class="smallexample"> -fsyntax-only -pedantic -pedantic-errors -w -Wextra -Wall -Waggregate-return -Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment -Wconversion -Wno-deprecated-declarations -Wdisabled-optimization -Wno-div-by-zero -Wendif-labels -Werror -Werror-implicit-function-declaration -Wfloat-equal -Wformat -Wformat=2 -Wno-format-extra-args -Wformat-nonliteral -Wformat-security -Wformat-y2k -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wimport -Wno-import -Winit-self -Winline -Wno-invalid-offsetof -Winvalid-pch -Wlarger-than-<var>len</var> -Wlong-long -Wmain -Wmissing-braces -Wmissing-format-attribute -Wmissing-noreturn -Wno-multichar -Wnonnull -Wpacked -Wpadded -Wparentheses -Wpointer-arith -Wredundant-decls -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wstrict-aliasing -Wstrict-aliasing=2 -Wswitch -Wswitch-default -Wswitch-enum -Wsystem-headers -Wtrigraphs -Wundef -Wuninitialized -Wunknown-pragmas -Wunreachable-code -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable -Wwrite-strings -Wvariadic-macros </pre> <br><dt><em>C-only Warning Options</em> <dd> <pre class="smallexample"> -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wtraditional -Wdeclaration-after-statement </pre> <br><dt><em>Debugging Options</em> <dd>See <a href="Debugging-Options.html#Debugging%20Options">Options for Debugging Your Program or GCC</a>. <pre class="smallexample"> -d<var>letters</var> -dumpspecs -dumpmachine -dumpversion -fdump-unnumbered -fdump-translation-unit[-<var>n</var>] -fdump-class-hierarchy[-<var>n</var>] -fdump-tree-original[-<var>n</var>] -fdump-tree-optimized[-<var>n</var>] -fdump-tree-inlined[-<var>n</var>] -feliminate-dwarf2-dups -feliminate-unused-debug-types -feliminate-unused-debug-symbols -fmem-report -fprofile-arcs -frandom-seed=<var>string</var> -fsched-verbose=<var>n</var> -ftest-coverage -ftime-report -fvar-tracking -g -g<var>level</var> -gcoff -gdwarf-2 -ggdb -gstabs -gstabs+ -gvms -gxcoff -gxcoff+ -p -pg -print-file-name=<var>library</var> -print-libgcc-file-name -print-multi-directory -print-multi-lib -print-prog-name=<var>program</var> -print-search-dirs -Q -save-temps -time </pre> <br><dt><em>Optimization Options</em> <dd>See <a href="Optimize-Options.html#Optimize%20Options">Options that Control Optimization</a>. <pre class="smallexample"> -falign-functions=<var>n</var> -falign-jumps=<var>n</var> -falign-labels=<var>n</var> -falign-loops=<var>n</var> -fbranch-probabilities -fprofile-values -fvpt -fbranch-target-load-optimize -fbranch-target-load-optimize2 -fbtr-bb-exclusive -fcaller-saves -fcprop-registers -fcse-follow-jumps -fcse-skip-blocks -fdata-sections -fdelayed-branch -fdelete-null-pointer-checks -fexpensive-optimizations -ffast-math -ffloat-store -fforce-addr -fforce-mem -ffunction-sections -fgcse -fgcse-lm -fgcse-sm -fgcse-las -floop-optimize -fcrossjumping -fif-conversion -fif-conversion2 -finline-functions -finline-limit=<var>n</var> -fkeep-inline-functions -fkeep-static-consts -fmerge-constants -fmerge-all-constants -fmove-all-movables -fnew-ra -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 -funsafe-math-optimizations -ffinite-math-only -fno-trapping-math -fno-zero-initialized-in-bss -fomit-frame-pointer -foptimize-register-move -foptimize-sibling-calls -fprefetch-loop-arrays -fprofile-generate -fprofile-use -freduce-all-givs -fregmove -frename-registers -freorder-blocks -freorder-blocks-and-partition -freorder-functions -frerun-cse-after-loop -frerun-loop-opt -frounding-math -fschedule-insns -fschedule-insns2 -fno-sched-interblock -fno-sched-spec -fsched-spec-load -fsched-spec-load-dangerous -fsched-stalled-insns=<var>n</var> -sched-stalled-insns-dep=<var>n</var> -fsched2-use-superblocks -fsched2-use-traces -fsignaling-nans -fsingle-precision-constant -fstrength-reduce -fstrict-aliasing -ftracer -fthread-jumps -funroll-all-loops -funroll-loops -fpeel-loops -funswitch-loops -fold-unroll-loops -fold-unroll-all-loops --param <var>name</var>=<var>value</var> -O -O0 -O1 -O2 -O3 -Os </pre> <br><dt><em>Preprocessor Options</em> <dd>See <a href="Preprocessor-Options.html#Preprocessor%20Options">Options Controlling the Preprocessor</a>. <pre class="smallexample"> -A<var>question</var>=<var>answer</var> -A-<var>question</var>[=<var>answer</var>] -C -dD -dI -dM -dN ⌨️ 快捷键说明
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