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.\" ========================================================================
.\" ========================================================================
.\"
.\"
.IX Title "GCC 1"
.IX Title "GCC 1"
.TH GCC 1 "2010-07-31" "gcc-4.5.1" "GNU"
.TH GCC 1 "2010-07-31" "gcc-4.5.1" "GNU"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.\" way too many mistakes in technical documents.
.if n .ad l
.if n .ad l
.nh
.nh
.SH "NAME"
.SH "NAME"
gcc \- GNU project C and C++ compiler
gcc \- GNU project C and C++ compiler
.SH "SYNOPSIS"
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.IX Header "SYNOPSIS"
gcc [\fB\-c\fR|\fB\-S\fR|\fB\-E\fR] [\fB\-std=\fR\fIstandard\fR]
gcc [\fB\-c\fR|\fB\-S\fR|\fB\-E\fR] [\fB\-std=\fR\fIstandard\fR]
    [\fB\-g\fR] [\fB\-pg\fR] [\fB\-O\fR\fIlevel\fR]
    [\fB\-g\fR] [\fB\-pg\fR] [\fB\-O\fR\fIlevel\fR]
    [\fB\-W\fR\fIwarn\fR...] [\fB\-pedantic\fR]
    [\fB\-W\fR\fIwarn\fR...] [\fB\-pedantic\fR]
    [\fB\-I\fR\fIdir\fR...] [\fB\-L\fR\fIdir\fR...]
    [\fB\-I\fR\fIdir\fR...] [\fB\-L\fR\fIdir\fR...]
    [\fB\-D\fR\fImacro\fR[=\fIdefn\fR]...] [\fB\-U\fR\fImacro\fR]
    [\fB\-D\fR\fImacro\fR[=\fIdefn\fR]...] [\fB\-U\fR\fImacro\fR]
    [\fB\-f\fR\fIoption\fR...] [\fB\-m\fR\fImachine-option\fR...]
    [\fB\-f\fR\fIoption\fR...] [\fB\-m\fR\fImachine-option\fR...]
    [\fB\-o\fR \fIoutfile\fR] [@\fIfile\fR] \fIinfile\fR...
    [\fB\-o\fR \fIoutfile\fR] [@\fIfile\fR] \fIinfile\fR...
.PP
.PP
Only the most useful options are listed here; see below for the
Only the most useful options are listed here; see below for the
remainder.  \fBg++\fR accepts mostly the same options as \fBgcc\fR.
remainder.  \fBg++\fR accepts mostly the same options as \fBgcc\fR.
.SH "DESCRIPTION"
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.IX Header "DESCRIPTION"
When you invoke \s-1GCC\s0, it normally does preprocessing, compilation,
When you invoke \s-1GCC\s0, it normally does preprocessing, compilation,
assembly and linking.  The \*(L"overall options\*(R" allow you to stop this
assembly and linking.  The \*(L"overall options\*(R" allow you to stop this
process at an intermediate stage.  For example, the \fB\-c\fR option
process at an intermediate stage.  For example, the \fB\-c\fR option
says not to run the linker.  Then the output consists of object files
says not to run the linker.  Then the output consists of object files
output by the assembler.
output by the assembler.
.PP
.PP
Other options are passed on to one stage of processing.  Some options
Other options are passed on to one stage of processing.  Some options
control the preprocessor and others the compiler itself.  Yet other
control the preprocessor and others the compiler itself.  Yet other
options control the assembler and linker; most of these are not
options control the assembler and linker; most of these are not
documented here, since you rarely need to use any of them.
documented here, since you rarely need to use any of them.
.PP
.PP
Most of the command line options that you can use with \s-1GCC\s0 are useful
Most of the command line options that you can use with \s-1GCC\s0 are useful
for C programs; when an option is only useful with another language
for C programs; when an option is only useful with another language
(usually \*(C+), the explanation says so explicitly.  If the description
(usually \*(C+), the explanation says so explicitly.  If the description
for a particular option does not mention a source language, you can use
for a particular option does not mention a source language, you can use
that option with all supported languages.
that option with all supported languages.
.PP
.PP
The \fBgcc\fR program accepts options and file names as operands.  Many
The \fBgcc\fR program accepts options and file names as operands.  Many
options have multi-letter names; therefore multiple single-letter options
options have multi-letter names; therefore multiple single-letter options
may \fInot\fR be grouped: \fB\-dv\fR is very different from \fB\-d\ \-v\fR.
may \fInot\fR be grouped: \fB\-dv\fR is very different from \fB\-d\ \-v\fR.
.PP
.PP
You can mix options and other arguments.  For the most part, the order
You can mix options and other arguments.  For the most part, the order
you use doesn't matter.  Order does matter when you use several
you use doesn't matter.  Order does matter when you use several
options of the same kind; for example, if you specify \fB\-L\fR more
options of the same kind; for example, if you specify \fB\-L\fR more
than once, the directories are searched in the order specified.  Also,
than once, the directories are searched in the order specified.  Also,
the placement of the \fB\-l\fR option is significant.
the placement of the \fB\-l\fR option is significant.
.PP
.PP
Many options have long names starting with \fB\-f\fR or with
Many options have long names starting with \fB\-f\fR or with
\&\fB\-W\fR\-\-\-for example,
\&\fB\-W\fR\-\-\-for example,
\&\fB\-fmove\-loop\-invariants\fR, \fB\-Wformat\fR and so on.  Most of
\&\fB\-fmove\-loop\-invariants\fR, \fB\-Wformat\fR and so on.  Most of
these have both positive and negative forms; the negative form of
these have both positive and negative forms; the negative form of
\&\fB\-ffoo\fR would be \fB\-fno\-foo\fR.  This manual documents
\&\fB\-ffoo\fR would be \fB\-fno\-foo\fR.  This manual documents
only one of these two forms, whichever one is not the default.
only one of these two forms, whichever one is not the default.
.SH "OPTIONS"
.SH "OPTIONS"
.IX Header "OPTIONS"
.IX Header "OPTIONS"
.Sh "Option Summary"
.Sh "Option Summary"
.IX Subsection "Option Summary"
.IX Subsection "Option Summary"
Here is a summary of all the options, grouped by type.  Explanations are
Here is a summary of all the options, grouped by type.  Explanations are
in the following sections.
in the following sections.
.IP "\fIOverall Options\fR" 4
.IP "\fIOverall Options\fR" 4
.IX Item "Overall Options"
.IX Item "Overall Options"
\&\fB\-c  \-S  \-E  \-o\fR \fIfile\fR  \fB\-combine  \-no\-canonical\-prefixes
\&\fB\-c  \-S  \-E  \-o\fR \fIfile\fR  \fB\-combine  \-no\-canonical\-prefixes
\&\-pipe  \-pass\-exit\-codes
\&\-pipe  \-pass\-exit\-codes
\&\-x\fR \fIlanguage\fR  \fB\-v  \-###  \-\-help\fR[\fB=\fR\fIclass\fR[\fB,...\fR]]  \fB\-\-target\-help
\&\-x\fR \fIlanguage\fR  \fB\-v  \-###  \-\-help\fR[\fB=\fR\fIclass\fR[\fB,...\fR]]  \fB\-\-target\-help
\&\-\-version \-wrapper@\fR\fIfile\fR \fB\-fplugin=\fR\fIfile\fR \fB\-fplugin\-arg\-\fR\fIname\fR\fB=\fR\fIarg\fR
\&\-\-version \-wrapper@\fR\fIfile\fR \fB\-fplugin=\fR\fIfile\fR \fB\-fplugin\-arg\-\fR\fIname\fR\fB=\fR\fIarg\fR
.IP "\fIC Language Options\fR" 4
.IP "\fIC Language Options\fR" 4
.IX Item "C Language Options"
.IX Item "C Language Options"
\&\fB\-ansi  \-std=\fR\fIstandard\fR  \fB\-fgnu89\-inline
\&\fB\-ansi  \-std=\fR\fIstandard\fR  \fB\-fgnu89\-inline
\&\-aux\-info\fR \fIfilename\fR
\&\-aux\-info\fR \fIfilename\fR
\&\fB\-fno\-asm  \-fno\-builtin  \-fno\-builtin\-\fR\fIfunction\fR
\&\fB\-fno\-asm  \-fno\-builtin  \-fno\-builtin\-\fR\fIfunction\fR
\&\fB\-fhosted  \-ffreestanding \-fopenmp \-fms\-extensions
\&\fB\-fhosted  \-ffreestanding \-fopenmp \-fms\-extensions
\&\-trigraphs  \-no\-integrated\-cpp  \-traditional  \-traditional\-cpp
\&\-trigraphs  \-no\-integrated\-cpp  \-traditional  \-traditional\-cpp
\&\-fallow\-single\-precision  \-fcond\-mismatch \-flax\-vector\-conversions
\&\-fallow\-single\-precision  \-fcond\-mismatch \-flax\-vector\-conversions
\&\-fsigned\-bitfields  \-fsigned\-char
\&\-fsigned\-bitfields  \-fsigned\-char
\&\-funsigned\-bitfields  \-funsigned\-char\fR
\&\-funsigned\-bitfields  \-funsigned\-char\fR
.IP "\fI\*(C+ Language Options\fR" 4
.IP "\fI\*(C+ Language Options\fR" 4
.IX Item " Language Options"
.IX Item " Language Options"
\&\fB\-fabi\-version=\fR\fIn\fR  \fB\-fno\-access\-control  \-fcheck\-new
\&\fB\-fabi\-version=\fR\fIn\fR  \fB\-fno\-access\-control  \-fcheck\-new
\&\-fconserve\-space  \-ffriend\-injection
\&\-fconserve\-space  \-ffriend\-injection
\&\-fno\-elide\-constructors
\&\-fno\-elide\-constructors
\&\-fno\-enforce\-eh\-specs
\&\-fno\-enforce\-eh\-specs
\&\-ffor\-scope  \-fno\-for\-scope  \-fno\-gnu\-keywords
\&\-ffor\-scope  \-fno\-for\-scope  \-fno\-gnu\-keywords
\&\-fno\-implicit\-templates
\&\-fno\-implicit\-templates
\&\-fno\-implicit\-inline\-templates
\&\-fno\-implicit\-inline\-templates
\&\-fno\-implement\-inlines  \-fms\-extensions
\&\-fno\-implement\-inlines  \-fms\-extensions
\&\-fno\-nonansi\-builtins  \-fno\-operator\-names
\&\-fno\-nonansi\-builtins  \-fno\-operator\-names
\&\-fno\-optional\-diags  \-fpermissive
\&\-fno\-optional\-diags  \-fpermissive
\&\-fno\-pretty\-templates
\&\-fno\-pretty\-templates
\&\-frepo  \-fno\-rtti  \-fstats  \-ftemplate\-depth=\fR\fIn\fR
\&\-frepo  \-fno\-rtti  \-fstats  \-ftemplate\-depth=\fR\fIn\fR
\&\fB\-fno\-threadsafe\-statics \-fuse\-cxa\-atexit  \-fno\-weak  \-nostdinc++
\&\fB\-fno\-threadsafe\-statics \-fuse\-cxa\-atexit  \-fno\-weak  \-nostdinc++
\&\-fno\-default\-inline  \-fvisibility\-inlines\-hidden
\&\-fno\-default\-inline  \-fvisibility\-inlines\-hidden
\&\-fvisibility\-ms\-compat
\&\-fvisibility\-ms\-compat
\&\-Wabi  \-Wconversion\-null  \-Wctor\-dtor\-privacy
\&\-Wabi  \-Wconversion\-null  \-Wctor\-dtor\-privacy
\&\-Wnon\-virtual\-dtor  \-Wreorder
\&\-Wnon\-virtual\-dtor  \-Wreorder
\&\-Weffc++  \-Wstrict\-null\-sentinel
\&\-Weffc++  \-Wstrict\-null\-sentinel
\&\-Wno\-non\-template\-friend  \-Wold\-style\-cast
\&\-Wno\-non\-template\-friend  \-Wold\-style\-cast
\&\-Woverloaded\-virtual  \-Wno\-pmf\-conversions
\&\-Woverloaded\-virtual  \-Wno\-pmf\-conversions
\&\-Wsign\-promo\fR
\&\-Wsign\-promo\fR
.IP "\fIObjective-C and Objective\-\*(C+ Language Options\fR" 4
.IP "\fIObjective-C and Objective\-\*(C+ Language Options\fR" 4
.IX Item "Objective-C and Objective- Language Options"
.IX Item "Objective-C and Objective- Language Options"
\&\fB\-fconstant\-string\-class=\fR\fIclass-name\fR
\&\fB\-fconstant\-string\-class=\fR\fIclass-name\fR
\&\fB\-fgnu\-runtime  \-fnext\-runtime
\&\fB\-fgnu\-runtime  \-fnext\-runtime
\&\-fno\-nil\-receivers
\&\-fno\-nil\-receivers
\&\-fobjc\-call\-cxx\-cdtors
\&\-fobjc\-call\-cxx\-cdtors
\&\-fobjc\-direct\-dispatch
\&\-fobjc\-direct\-dispatch
\&\-fobjc\-exceptions
\&\-fobjc\-exceptions
\&\-fobjc\-gc
\&\-fobjc\-gc
\&\-freplace\-objc\-classes
\&\-freplace\-objc\-classes
\&\-fzero\-link
\&\-fzero\-link
\&\-gen\-decls
\&\-gen\-decls
\&\-Wassign\-intercept
\&\-Wassign\-intercept
\&\-Wno\-protocol  \-Wselector
\&\-Wno\-protocol  \-Wselector
\&\-Wstrict\-selector\-match
\&\-Wstrict\-selector\-match
\&\-Wundeclared\-selector\fR
\&\-Wundeclared\-selector\fR
.IP "\fILanguage Independent Options\fR" 4
.IP "\fILanguage Independent Options\fR" 4
.IX Item "Language Independent Options"
.IX Item "Language Independent Options"
\&\fB\-fmessage\-length=\fR\fIn\fR
\&\fB\-fmessage\-length=\fR\fIn\fR
\&\fB\-fdiagnostics\-show\-location=\fR[\fBonce\fR|\fBevery-line\fR]
\&\fB\-fdiagnostics\-show\-location=\fR[\fBonce\fR|\fBevery-line\fR]
\&\fB\-fdiagnostics\-show\-option\fR
\&\fB\-fdiagnostics\-show\-option\fR
.IP "\fIWarning Options\fR" 4
.IP "\fIWarning Options\fR" 4
.IX Item "Warning Options"
.IX Item "Warning Options"
\&\fB\-fsyntax\-only  \-pedantic  \-pedantic\-errors
\&\fB\-fsyntax\-only  \-pedantic  \-pedantic\-errors
\&\-w  \-Wextra  \-Wall  \-Waddress  \-Waggregate\-return  \-Warray\-bounds
\&\-w  \-Wextra  \-Wall  \-Waddress  \-Waggregate\-return  \-Warray\-bounds
\&\-Wno\-attributes \-Wno\-builtin\-macro\-redefined
\&\-Wno\-attributes \-Wno\-builtin\-macro\-redefined
\&\-Wc++\-compat \-Wc++0x\-compat \-Wcast\-align  \-Wcast\-qual
\&\-Wc++\-compat \-Wc++0x\-compat \-Wcast\-align  \-Wcast\-qual
\&\-Wchar\-subscripts \-Wclobbered  \-Wcomment
\&\-Wchar\-subscripts \-Wclobbered  \-Wcomment
\&\-Wconversion  \-Wcoverage\-mismatch  \-Wno\-deprecated
\&\-Wconversion  \-Wcoverage\-mismatch  \-Wno\-deprecated
\&\-Wno\-deprecated\-declarations \-Wdisabled\-optimization
\&\-Wno\-deprecated\-declarations \-Wdisabled\-optimization
\&\-Wno\-div\-by\-zero \-Wempty\-body  \-Wenum\-compare \-Wno\-endif\-labels
\&\-Wno\-div\-by\-zero \-Wempty\-body  \-Wenum\-compare \-Wno\-endif\-labels
\&\-Werror  \-Werror=*
\&\-Werror  \-Werror=*
\&\-Wfatal\-errors  \-Wfloat\-equal  \-Wformat  \-Wformat=2
\&\-Wfatal\-errors  \-Wfloat\-equal  \-Wformat  \-Wformat=2
\&\-Wno\-format\-contains\-nul \-Wno\-format\-extra\-args \-Wformat\-nonliteral
\&\-Wno\-format\-contains\-nul \-Wno\-format\-extra\-args \-Wformat\-nonliteral
\&\-Wformat\-security  \-Wformat\-y2k
\&\-Wformat\-security  \-Wformat\-y2k
\&\-Wframe\-larger\-than=\fR\fIlen\fR \fB\-Wjump\-misses\-init \-Wignored\-qualifiers
\&\-Wframe\-larger\-than=\fR\fIlen\fR \fB\-Wjump\-misses\-init \-Wignored\-qualifiers
\&\-Wimplicit  \-Wimplicit\-function\-declaration  \-Wimplicit\-int
\&\-Wimplicit  \-Wimplicit\-function\-declaration  \-Wimplicit\-int
\&\-Winit\-self  \-Winline
\&\-Winit\-self  \-Winline
\&\-Wno\-int\-to\-pointer\-cast \-Wno\-invalid\-offsetof
\&\-Wno\-int\-to\-pointer\-cast \-Wno\-invalid\-offsetof
\&\-Winvalid\-pch \-Wlarger\-than=\fR\fIlen\fR  \fB\-Wunsafe\-loop\-optimizations
\&\-Winvalid\-pch \-Wlarger\-than=\fR\fIlen\fR  \fB\-Wunsafe\-loop\-optimizations
\&\-Wlogical\-op \-Wlong\-long
\&\-Wlogical\-op \-Wlong\-long
\&\-Wmain  \-Wmissing\-braces  \-Wmissing\-field\-initializers
\&\-Wmain  \-Wmissing\-braces  \-Wmissing\-field\-initializers
\&\-Wmissing\-format\-attribute  \-Wmissing\-include\-dirs
\&\-Wmissing\-format\-attribute  \-Wmissing\-include\-dirs
\&\-Wmissing\-noreturn  \-Wno\-mudflap
\&\-Wmissing\-noreturn  \-Wno\-mudflap
\&\-Wno\-multichar  \-Wnonnull  \-Wno\-overflow
\&\-Wno\-multichar  \-Wnonnull  \-Wno\-overflow
\&\-Woverlength\-strings  \-Wpacked  \-Wpacked\-bitfield\-compat  \-Wpadded
\&\-Woverlength\-strings  \-Wpacked  \-Wpacked\-bitfield\-compat  \-Wpadded
\&\-Wparentheses  \-Wpedantic\-ms\-format \-Wno\-pedantic\-ms\-format
\&\-Wparentheses  \-Wpedantic\-ms\-format \-Wno\-pedantic\-ms\-format
\&\-Wpointer\-arith  \-Wno\-pointer\-to\-int\-cast
\&\-Wpointer\-arith  \-Wno\-pointer\-to\-int\-cast
\&\-Wredundant\-decls
\&\-Wredundant\-decls
\&\-Wreturn\-type  \-Wsequence\-point  \-Wshadow
\&\-Wreturn\-type  \-Wsequence\-point  \-Wshadow
\&\-Wsign\-compare  \-Wsign\-conversion  \-Wstack\-protector
\&\-Wsign\-compare  \-Wsign\-conversion  \-Wstack\-protector
\&\-Wstrict\-aliasing \-Wstrict\-aliasing=n
\&\-Wstrict\-aliasing \-Wstrict\-aliasing=n
\&\-Wstrict\-overflow \-Wstrict\-overflow=\fR\fIn\fR
\&\-Wstrict\-overflow \-Wstrict\-overflow=\fR\fIn\fR
\&\fB\-Wswitch  \-Wswitch\-default  \-Wswitch\-enum \-Wsync\-nand
\&\fB\-Wswitch  \-Wswitch\-default  \-Wswitch\-enum \-Wsync\-nand
\&\-Wsystem\-headers  \-Wtrigraphs  \-Wtype\-limits  \-Wundef  \-Wuninitialized
\&\-Wsystem\-headers  \-Wtrigraphs  \-Wtype\-limits  \-Wundef  \-Wuninitialized
\&\-Wunknown\-pragmas  \-Wno\-pragmas
\&\-Wunknown\-pragmas  \-Wno\-pragmas
\&\-Wunsuffixed\-float\-constants  \-Wunused  \-Wunused\-function
\&\-Wunsuffixed\-float\-constants  \-Wunused  \-Wunused\-function
\&\-Wunused\-label  \-Wunused\-parameter \-Wno\-unused\-result \-Wunused\-value  \-Wunused\-variable
\&\-Wunused\-label  \-Wunused\-parameter \-Wno\-unused\-result \-Wunused\-value  \-Wunused\-variable
\&\-Wvariadic\-macros \-Wvla
\&\-Wvariadic\-macros \-Wvla
\&\-Wvolatile\-register\-var  \-Wwrite\-strings\fR
\&\-Wvolatile\-register\-var  \-Wwrite\-strings\fR
.IP "\fIC and Objective-C-only Warning Options\fR" 4
.IP "\fIC and Objective-C-only Warning Options\fR" 4
.IX Item "C and Objective-C-only Warning Options"
.IX Item "C and Objective-C-only Warning Options"
\&\fB\-Wbad\-function\-cast  \-Wmissing\-declarations
\&\fB\-Wbad\-function\-cast  \-Wmissing\-declarations
\&\-Wmissing\-parameter\-type  \-Wmissing\-prototypes  \-Wnested\-externs
\&\-Wmissing\-parameter\-type  \-Wmissing\-prototypes  \-Wnested\-externs
\&\-Wold\-style\-declaration  \-Wold\-style\-definition
\&\-Wold\-style\-declaration  \-Wold\-style\-definition
\&\-Wstrict\-prototypes  \-Wtraditional  \-Wtraditional\-conversion
\&\-Wstrict\-prototypes  \-Wtraditional  \-Wtraditional\-conversion
\&\-Wdeclaration\-after\-statement \-Wpointer\-sign\fR
\&\-Wdeclaration\-after\-statement \-Wpointer\-sign\fR
.IP "\fIDebugging Options\fR" 4
.IP "\fIDebugging Options\fR" 4
.IX Item "Debugging Options"
.IX Item "Debugging Options"
\&\fB\-d\fR\fIletters\fR  \fB\-dumpspecs  \-dumpmachine  \-dumpversion
\&\fB\-d\fR\fIletters\fR  \fB\-dumpspecs  \-dumpmachine  \-dumpversion
\&\-fdbg\-cnt\-list \-fdbg\-cnt=\fR\fIcounter-value-list\fR
\&\-fdbg\-cnt\-list \-fdbg\-cnt=\fR\fIcounter-value-list\fR
\&\fB\-fdump\-noaddr \-fdump\-unnumbered \-fdump\-unnumbered\-links
\&\fB\-fdump\-noaddr \-fdump\-unnumbered \-fdump\-unnumbered\-links
\&\-fdump\-translation\-unit\fR[\fB\-\fR\fIn\fR]
\&\-fdump\-translation\-unit\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-class\-hierarchy\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-class\-hierarchy\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-ipa\-all \-fdump\-ipa\-cgraph \-fdump\-ipa\-inline
\&\fB\-fdump\-ipa\-all \-fdump\-ipa\-cgraph \-fdump\-ipa\-inline
\&\-fdump\-statistics
\&\-fdump\-statistics
\&\-fdump\-tree\-all
\&\-fdump\-tree\-all
\&\-fdump\-tree\-original\fR[\fB\-\fR\fIn\fR]
\&\-fdump\-tree\-original\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-optimized\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-optimized\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-cfg \-fdump\-tree\-vcg \-fdump\-tree\-alias
\&\fB\-fdump\-tree\-cfg \-fdump\-tree\-vcg \-fdump\-tree\-alias
\&\-fdump\-tree\-ch
\&\-fdump\-tree\-ch
\&\-fdump\-tree\-ssa\fR[\fB\-\fR\fIn\fR] \fB\-fdump\-tree\-pre\fR[\fB\-\fR\fIn\fR]
\&\-fdump\-tree\-ssa\fR[\fB\-\fR\fIn\fR] \fB\-fdump\-tree\-pre\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-ccp\fR[\fB\-\fR\fIn\fR] \fB\-fdump\-tree\-dce\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-ccp\fR[\fB\-\fR\fIn\fR] \fB\-fdump\-tree\-dce\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-gimple\fR[\fB\-raw\fR] \fB\-fdump\-tree\-mudflap\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-gimple\fR[\fB\-raw\fR] \fB\-fdump\-tree\-mudflap\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-dom\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-dom\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-dse\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-dse\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-phiprop\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-phiprop\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-phiopt\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-phiopt\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-forwprop\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-forwprop\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-copyrename\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-copyrename\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-nrv \-fdump\-tree\-vect
\&\fB\-fdump\-tree\-nrv \-fdump\-tree\-vect
\&\-fdump\-tree\-sink
\&\-fdump\-tree\-sink
\&\-fdump\-tree\-sra\fR[\fB\-\fR\fIn\fR]
\&\-fdump\-tree\-sra\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-forwprop\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-forwprop\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-fre\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-fre\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-vrp\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-vrp\fR[\fB\-\fR\fIn\fR]
\&\fB\-ftree\-vectorizer\-verbose=\fR\fIn\fR
\&\fB\-ftree\-vectorizer\-verbose=\fR\fIn\fR
\&\fB\-fdump\-tree\-storeccp\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-tree\-storeccp\fR[\fB\-\fR\fIn\fR]
\&\fB\-fdump\-final\-insns=\fR\fIfile\fR
\&\fB\-fdump\-final\-insns=\fR\fIfile\fR
\&\fB\-fcompare\-debug\fR[\fB=\fR\fIopts\fR]  \fB\-fcompare\-debug\-second
\&\fB\-fcompare\-debug\fR[\fB=\fR\fIopts\fR]  \fB\-fcompare\-debug\-second
\&\-feliminate\-dwarf2\-dups \-feliminate\-unused\-debug\-types
\&\-feliminate\-dwarf2\-dups \-feliminate\-unused\-debug\-types
\&\-feliminate\-unused\-debug\-symbols \-femit\-class\-debug\-always
\&\-feliminate\-unused\-debug\-symbols \-femit\-class\-debug\-always
\&\-fenable\-icf\-debug
\&\-fenable\-icf\-debug
\&\-fmem\-report \-fpre\-ipa\-mem\-report \-fpost\-ipa\-mem\-report \-fprofile\-arcs
\&\-fmem\-report \-fpre\-ipa\-mem\-report \-fpost\-ipa\-mem\-report \-fprofile\-arcs
\&\-frandom\-seed=\fR\fIstring\fR \fB\-fsched\-verbose=\fR\fIn\fR
\&\-frandom\-seed=\fR\fIstring\fR \fB\-fsched\-verbose=\fR\fIn\fR
\&\fB\-fsel\-sched\-verbose \-fsel\-sched\-dump\-cfg \-fsel\-sched\-pipelining\-verbose
\&\fB\-fsel\-sched\-verbose \-fsel\-sched\-dump\-cfg \-fsel\-sched\-pipelining\-verbose
\&\-ftest\-coverage  \-ftime\-report \-fvar\-tracking
\&\-ftest\-coverage  \-ftime\-report \-fvar\-tracking
\&\-fvar\-tracking\-assignments  \-fvar\-tracking\-assignments\-toggle
\&\-fvar\-tracking\-assignments  \-fvar\-tracking\-assignments\-toggle
\&\-g  \-g\fR\fIlevel\fR  \fB\-gtoggle  \-gcoff  \-gdwarf\-\fR\fIversion\fR
\&\-g  \-g\fR\fIlevel\fR  \fB\-gtoggle  \-gcoff  \-gdwarf\-\fR\fIversion\fR
\&\fB\-ggdb  \-gstabs  \-gstabs+  \-gstrict\-dwarf  \-gno\-strict\-dwarf
\&\fB\-ggdb  \-gstabs  \-gstabs+  \-gstrict\-dwarf  \-gno\-strict\-dwarf
\&\-gvms  \-gxcoff  \-gxcoff+
\&\-gvms  \-gxcoff  \-gxcoff+
\&\-fno\-merge\-debug\-strings \-fno\-dwarf2\-cfi\-asm
\&\-fno\-merge\-debug\-strings \-fno\-dwarf2\-cfi\-asm
\&\-fdebug\-prefix\-map=\fR\fIold\fR\fB=\fR\fInew\fR
\&\-fdebug\-prefix\-map=\fR\fIold\fR\fB=\fR\fInew\fR
\&\fB\-femit\-struct\-debug\-baseonly \-femit\-struct\-debug\-reduced
\&\fB\-femit\-struct\-debug\-baseonly \-femit\-struct\-debug\-reduced
\&\-femit\-struct\-debug\-detailed\fR[\fB=\fR\fIspec-list\fR]
\&\-femit\-struct\-debug\-detailed\fR[\fB=\fR\fIspec-list\fR]
\&\fB\-p  \-pg  \-print\-file\-name=\fR\fIlibrary\fR  \fB\-print\-libgcc\-file\-name
\&\fB\-p  \-pg  \-print\-file\-name=\fR\fIlibrary\fR  \fB\-print\-libgcc\-file\-name
\&\-print\-multi\-directory  \-print\-multi\-lib  \-print\-multi\-os\-directory
\&\-print\-multi\-directory  \-print\-multi\-lib  \-print\-multi\-os\-directory
\&\-print\-prog\-name=\fR\fIprogram\fR  \fB\-print\-search\-dirs  \-Q
\&\-print\-prog\-name=\fR\fIprogram\fR  \fB\-print\-search\-dirs  \-Q
\&\-print\-sysroot \-print\-sysroot\-headers\-suffix
\&\-print\-sysroot \-print\-sysroot\-headers\-suffix
\&\-save\-temps \-save\-temps=cwd \-save\-temps=obj \-time\fR[\fB=\fR\fIfile\fR]
\&\-save\-temps \-save\-temps=cwd \-save\-temps=obj \-time\fR[\fB=\fR\fIfile\fR]
.IP "\fIOptimization Options\fR" 4
.IP "\fIOptimization Options\fR" 4
.IX Item "Optimization Options"
.IX Item "Optimization Options"
\&\fB\-falign\-functions[=\fR\fIn\fR\fB] \-falign\-jumps[=\fR\fIn\fR\fB]
\&\fB\-falign\-functions[=\fR\fIn\fR\fB] \-falign\-jumps[=\fR\fIn\fR\fB]
\&\-falign\-labels[=\fR\fIn\fR\fB] \-falign\-loops[=\fR\fIn\fR\fB] \-fassociative\-math
\&\-falign\-labels[=\fR\fIn\fR\fB] \-falign\-loops[=\fR\fIn\fR\fB] \-fassociative\-math
\&\-fauto\-inc\-dec \-fbranch\-probabilities \-fbranch\-target\-load\-optimize
\&\-fauto\-inc\-dec \-fbranch\-probabilities \-fbranch\-target\-load\-optimize
\&\-fbranch\-target\-load\-optimize2 \-fbtr\-bb\-exclusive \-fcaller\-saves
\&\-fbranch\-target\-load\-optimize2 \-fbtr\-bb\-exclusive \-fcaller\-saves
\&\-fcheck\-data\-deps \-fconserve\-stack \-fcprop\-registers \-fcrossjumping
\&\-fcheck\-data\-deps \-fconserve\-stack \-fcprop\-registers \-fcrossjumping
\&\-fcse\-follow\-jumps \-fcse\-skip\-blocks \-fcx\-fortran\-rules \-fcx\-limited\-range
\&\-fcse\-follow\-jumps \-fcse\-skip\-blocks \-fcx\-fortran\-rules \-fcx\-limited\-range
\&\-fdata\-sections \-fdce \-fdce
\&\-fdata\-sections \-fdce \-fdce
\&\-fdelayed\-branch \-fdelete\-null\-pointer\-checks \-fdse \-fdse
\&\-fdelayed\-branch \-fdelete\-null\-pointer\-checks \-fdse \-fdse
\&\-fearly\-inlining \-fipa\-sra \-fexpensive\-optimizations \-ffast\-math
\&\-fearly\-inlining \-fipa\-sra \-fexpensive\-optimizations \-ffast\-math
\&\-ffinite\-math\-only \-ffloat\-store \-fexcess\-precision=\fR\fIstyle\fR
\&\-ffinite\-math\-only \-ffloat\-store \-fexcess\-precision=\fR\fIstyle\fR
\&\fB\-fforward\-propagate \-ffunction\-sections
\&\fB\-fforward\-propagate \-ffunction\-sections
\&\-fgcse \-fgcse\-after\-reload \-fgcse\-las \-fgcse\-lm
\&\-fgcse \-fgcse\-after\-reload \-fgcse\-las \-fgcse\-lm
\&\-fgcse\-sm \-fif\-conversion \-fif\-conversion2 \-findirect\-inlining
\&\-fgcse\-sm \-fif\-conversion \-fif\-conversion2 \-findirect\-inlining
\&\-finline\-functions \-finline\-functions\-called\-once \-finline\-limit=\fR\fIn\fR
\&\-finline\-functions \-finline\-functions\-called\-once \-finline\-limit=\fR\fIn\fR
\&\fB\-finline\-small\-functions \-fipa\-cp \-fipa\-cp\-clone \-fipa\-matrix\-reorg \-fipa\-pta
\&\fB\-finline\-small\-functions \-fipa\-cp \-fipa\-cp\-clone \-fipa\-matrix\-reorg \-fipa\-pta
\&\-fipa\-pure\-const \-fipa\-reference \-fipa\-struct\-reorg
\&\-fipa\-pure\-const \-fipa\-reference \-fipa\-struct\-reorg
\&\-fipa\-type\-escape \-fira\-algorithm=\fR\fIalgorithm\fR
\&\-fipa\-type\-escape \-fira\-algorithm=\fR\fIalgorithm\fR
\&\fB\-fira\-region=\fR\fIregion\fR \fB\-fira\-coalesce
\&\fB\-fira\-region=\fR\fIregion\fR \fB\-fira\-coalesce
\&\-fira\-loop\-pressure \-fno\-ira\-share\-save\-slots
\&\-fira\-loop\-pressure \-fno\-ira\-share\-save\-slots
\&\-fno\-ira\-share\-spill\-slots \-fira\-verbose=\fR\fIn\fR
\&\-fno\-ira\-share\-spill\-slots \-fira\-verbose=\fR\fIn\fR
\&\fB\-fivopts \-fkeep\-inline\-functions \-fkeep\-static\-consts
\&\fB\-fivopts \-fkeep\-inline\-functions \-fkeep\-static\-consts
\&\-floop\-block \-floop\-interchange \-floop\-strip\-mine \-fgraphite\-identity
\&\-floop\-block \-floop\-interchange \-floop\-strip\-mine \-fgraphite\-identity
\&\-floop\-parallelize\-all \-flto \-flto\-compression\-level \-flto\-report \-fltrans
\&\-floop\-parallelize\-all \-flto \-flto\-compression\-level \-flto\-report \-fltrans
\&\-fltrans\-output\-list \-fmerge\-all\-constants \-fmerge\-constants \-fmodulo\-sched
\&\-fltrans\-output\-list \-fmerge\-all\-constants \-fmerge\-constants \-fmodulo\-sched
\&\-fmodulo\-sched\-allow\-regmoves \-fmove\-loop\-invariants \-fmudflap
\&\-fmodulo\-sched\-allow\-regmoves \-fmove\-loop\-invariants \-fmudflap
\&\-fmudflapir \-fmudflapth \-fno\-branch\-count\-reg \-fno\-default\-inline
\&\-fmudflapir \-fmudflapth \-fno\-branch\-count\-reg \-fno\-default\-inline
\&\-fno\-defer\-pop \-fno\-function\-cse \-fno\-guess\-branch\-probability
\&\-fno\-defer\-pop \-fno\-function\-cse \-fno\-guess\-branch\-probability
\&\-fno\-inline \-fno\-math\-errno \-fno\-peephole \-fno\-peephole2
\&\-fno\-inline \-fno\-math\-errno \-fno\-peephole \-fno\-peephole2
\&\-fno\-sched\-interblock \-fno\-sched\-spec \-fno\-signed\-zeros
\&\-fno\-sched\-interblock \-fno\-sched\-spec \-fno\-signed\-zeros
\&\-fno\-toplevel\-reorder \-fno\-trapping\-math \-fno\-zero\-initialized\-in\-bss
\&\-fno\-toplevel\-reorder \-fno\-trapping\-math \-fno\-zero\-initialized\-in\-bss
\&\-fomit\-frame\-pointer \-foptimize\-register\-move \-foptimize\-sibling\-calls
\&\-fomit\-frame\-pointer \-foptimize\-register\-move \-foptimize\-sibling\-calls
\&\-fpeel\-loops \-fpredictive\-commoning \-fprefetch\-loop\-arrays
\&\-fpeel\-loops \-fpredictive\-commoning \-fprefetch\-loop\-arrays
\&\-fprofile\-correction \-fprofile\-dir=\fR\fIpath\fR \fB\-fprofile\-generate
\&\-fprofile\-correction \-fprofile\-dir=\fR\fIpath\fR \fB\-fprofile\-generate
\&\-fprofile\-generate=\fR\fIpath\fR
\&\-fprofile\-generate=\fR\fIpath\fR
\&\fB\-fprofile\-use \-fprofile\-use=\fR\fIpath\fR \fB\-fprofile\-values
\&\fB\-fprofile\-use \-fprofile\-use=\fR\fIpath\fR \fB\-fprofile\-values
\&\-freciprocal\-math \-fregmove \-frename\-registers \-freorder\-blocks
\&\-freciprocal\-math \-fregmove \-frename\-registers \-freorder\-blocks
\&\-freorder\-blocks\-and\-partition \-freorder\-functions
\&\-freorder\-blocks\-and\-partition \-freorder\-functions
\&\-frerun\-cse\-after\-loop \-freschedule\-modulo\-scheduled\-loops
\&\-frerun\-cse\-after\-loop \-freschedule\-modulo\-scheduled\-loops
\&\-frounding\-math \-fsched2\-use\-superblocks \-fsched\-pressure
\&\-frounding\-math \-fsched2\-use\-superblocks \-fsched\-pressure
\&\-fsched\-spec\-load \-fsched\-spec\-load\-dangerous
\&\-fsched\-spec\-load \-fsched\-spec\-load\-dangerous
\&\-fsched\-stalled\-insns\-dep[=\fR\fIn\fR\fB] \-fsched\-stalled\-insns[=\fR\fIn\fR\fB]
\&\-fsched\-stalled\-insns\-dep[=\fR\fIn\fR\fB] \-fsched\-stalled\-insns[=\fR\fIn\fR\fB]
\&\-fsched\-group\-heuristic \-fsched\-critical\-path\-heuristic
\&\-fsched\-group\-heuristic \-fsched\-critical\-path\-heuristic
\&\-fsched\-spec\-insn\-heuristic \-fsched\-rank\-heuristic
\&\-fsched\-spec\-insn\-heuristic \-fsched\-rank\-heuristic
\&\-fsched\-last\-insn\-heuristic \-fsched\-dep\-count\-heuristic
\&\-fsched\-last\-insn\-heuristic \-fsched\-dep\-count\-heuristic
\&\-fschedule\-insns \-fschedule\-insns2 \-fsection\-anchors
\&\-fschedule\-insns \-fschedule\-insns2 \-fsection\-anchors
\&\-fselective\-scheduling \-fselective\-scheduling2
\&\-fselective\-scheduling \-fselective\-scheduling2
\&\-fsel\-sched\-pipelining \-fsel\-sched\-pipelining\-outer\-loops
\&\-fsel\-sched\-pipelining \-fsel\-sched\-pipelining\-outer\-loops
\&\-fsignaling\-nans \-fsingle\-precision\-constant \-fsplit\-ivs\-in\-unroller
\&\-fsignaling\-nans \-fsingle\-precision\-constant \-fsplit\-ivs\-in\-unroller
\&\-fsplit\-wide\-types \-fstack\-protector \-fstack\-protector\-all
\&\-fsplit\-wide\-types \-fstack\-protector \-fstack\-protector\-all
\&\-fstrict\-aliasing \-fstrict\-overflow \-fthread\-jumps \-ftracer
\&\-fstrict\-aliasing \-fstrict\-overflow \-fthread\-jumps \-ftracer
\&\-ftree\-builtin\-call\-dce \-ftree\-ccp \-ftree\-ch \-ftree\-copy\-prop
\&\-ftree\-builtin\-call\-dce \-ftree\-ccp \-ftree\-ch \-ftree\-copy\-prop
\&\-ftree\-copyrename \-ftree\-dce
\&\-ftree\-copyrename \-ftree\-dce
\&\-ftree\-dominator\-opts \-ftree\-dse \-ftree\-forwprop \-ftree\-fre \-ftree\-loop\-im
\&\-ftree\-dominator\-opts \-ftree\-dse \-ftree\-forwprop \-ftree\-fre \-ftree\-loop\-im
\&\-ftree\-phiprop \-ftree\-loop\-distribution
\&\-ftree\-phiprop \-ftree\-loop\-distribution
\&\-ftree\-loop\-ivcanon \-ftree\-loop\-linear \-ftree\-loop\-optimize
\&\-ftree\-loop\-ivcanon \-ftree\-loop\-linear \-ftree\-loop\-optimize
\&\-ftree\-parallelize\-loops=\fR\fIn\fR \fB\-ftree\-pre \-ftree\-pta \-ftree\-reassoc
\&\-ftree\-parallelize\-loops=\fR\fIn\fR \fB\-ftree\-pre \-ftree\-pta \-ftree\-reassoc
\&\-ftree\-sink \-ftree\-sra \-ftree\-switch\-conversion
\&\-ftree\-sink \-ftree\-sra \-ftree\-switch\-conversion
\&\-ftree\-ter \-ftree\-vect\-loop\-version \-ftree\-vectorize \-ftree\-vrp
\&\-ftree\-ter \-ftree\-vect\-loop\-version \-ftree\-vectorize \-ftree\-vrp
\&\-funit\-at\-a\-time \-funroll\-all\-loops \-funroll\-loops
\&\-funit\-at\-a\-time \-funroll\-all\-loops \-funroll\-loops
\&\-funsafe\-loop\-optimizations \-funsafe\-math\-optimizations \-funswitch\-loops
\&\-funsafe\-loop\-optimizations \-funsafe\-math\-optimizations \-funswitch\-loops
\&\-fvariable\-expansion\-in\-unroller \-fvect\-cost\-model \-fvpt \-fweb
\&\-fvariable\-expansion\-in\-unroller \-fvect\-cost\-model \-fvpt \-fweb
\&\-fwhole\-program \-fwhopr \-fwpa \-fuse\-linker\-plugin
\&\-fwhole\-program \-fwhopr \-fwpa \-fuse\-linker\-plugin
\&\-\-param\fR \fIname\fR\fB=\fR\fIvalue\fR
\&\-\-param\fR \fIname\fR\fB=\fR\fIvalue\fR
\&\fB\-O  \-O0  \-O1  \-O2  \-O3  \-Os\fR
\&\fB\-O  \-O0  \-O1  \-O2  \-O3  \-Os\fR
.IP "\fIPreprocessor Options\fR" 4
.IP "\fIPreprocessor Options\fR" 4
.IX Item "Preprocessor Options"
.IX Item "Preprocessor Options"
\&\fB\-A\fR\fIquestion\fR\fB=\fR\fIanswer\fR
\&\fB\-A\fR\fIquestion\fR\fB=\fR\fIanswer\fR
\&\fB\-A\-\fR\fIquestion\fR[\fB=\fR\fIanswer\fR]
\&\fB\-A\-\fR\fIquestion\fR[\fB=\fR\fIanswer\fR]
\&\fB\-C  \-dD  \-dI  \-dM  \-dN
\&\fB\-C  \-dD  \-dI  \-dM  \-dN
\&\-D\fR\fImacro\fR[\fB=\fR\fIdefn\fR]  \fB\-E  \-H
\&\-D\fR\fImacro\fR[\fB=\fR\fIdefn\fR]  \fB\-E  \-H
\&\-idirafter\fR \fIdir\fR
\&\-idirafter\fR \fIdir\fR
\&\fB\-include\fR \fIfile\fR  \fB\-imacros\fR \fIfile\fR
\&\fB\-include\fR \fIfile\fR  \fB\-imacros\fR \fIfile\fR
\&\fB\-iprefix\fR \fIfile\fR  \fB\-iwithprefix\fR \fIdir\fR
\&\fB\-iprefix\fR \fIfile\fR  \fB\-iwithprefix\fR \fIdir\fR
\&\fB\-iwithprefixbefore\fR \fIdir\fR  \fB\-isystem\fR \fIdir\fR
\&\fB\-iwithprefixbefore\fR \fIdir\fR  \fB\-isystem\fR \fIdir\fR
\&\fB\-imultilib\fR \fIdir\fR \fB\-isysroot\fR \fIdir\fR
\&\fB\-imultilib\fR \fIdir\fR \fB\-isysroot\fR \fIdir\fR
\&\fB\-M  \-MM  \-MF  \-MG  \-MP  \-MQ  \-MT  \-nostdinc
\&\fB\-M  \-MM  \-MF  \-MG  \-MP  \-MQ  \-MT  \-nostdinc
\&\-P  \-fworking\-directory  \-remap
\&\-P  \-fworking\-directory  \-remap
\&\-trigraphs  \-undef  \-U\fR\fImacro\fR  \fB\-Wp,\fR\fIoption\fR
\&\-trigraphs  \-undef  \-U\fR\fImacro\fR  \fB\-Wp,\fR\fIoption\fR
\&\fB\-Xpreprocessor\fR \fIoption\fR
\&\fB\-Xpreprocessor\fR \fIoption\fR
.IP "\fIAssembler Option\fR" 4
.IP "\fIAssembler Option\fR" 4
.IX Item "Assembler Option"
.IX Item "Assembler Option"
\&\fB\-Wa,\fR\fIoption\fR  \fB\-Xassembler\fR \fIoption\fR
\&\fB\-Wa,\fR\fIoption\fR  \fB\-Xassembler\fR \fIoption\fR
.IP "\fILinker Options\fR" 4
.IP "\fILinker Options\fR" 4
.IX Item "Linker Options"
.IX Item "Linker Options"
\&\fIobject-file-name\fR  \fB\-l\fR\fIlibrary\fR
\&\fIobject-file-name\fR  \fB\-l\fR\fIlibrary\fR
\&\fB\-nostartfiles  \-nodefaultlibs  \-nostdlib \-pie \-rdynamic
\&\fB\-nostartfiles  \-nodefaultlibs  \-nostdlib \-pie \-rdynamic
\&\-s  \-static  \-static\-libgcc  \-static\-libstdc++ \-shared
\&\-s  \-static  \-static\-libgcc  \-static\-libstdc++ \-shared
\&\-shared\-libgcc  \-symbolic
\&\-shared\-libgcc  \-symbolic
\&\-T\fR \fIscript\fR  \fB\-Wl,\fR\fIoption\fR  \fB\-Xlinker\fR \fIoption\fR
\&\-T\fR \fIscript\fR  \fB\-Wl,\fR\fIoption\fR  \fB\-Xlinker\fR \fIoption\fR
\&\fB\-u\fR \fIsymbol\fR
\&\fB\-u\fR \fIsymbol\fR
.IP "\fIDirectory Options\fR" 4
.IP "\fIDirectory Options\fR" 4
.IX Item "Directory Options"
.IX Item "Directory Options"
\&\fB\-B\fR\fIprefix\fR  \fB\-I\fR\fIdir\fR  \fB\-iquote\fR\fIdir\fR  \fB\-L\fR\fIdir\fR
\&\fB\-B\fR\fIprefix\fR  \fB\-I\fR\fIdir\fR  \fB\-iquote\fR\fIdir\fR  \fB\-L\fR\fIdir\fR
\&\fB\-specs=\fR\fIfile\fR  \fB\-I\- \-\-sysroot=\fR\fIdir\fR
\&\fB\-specs=\fR\fIfile\fR  \fB\-I\- \-\-sysroot=\fR\fIdir\fR
.IP "\fITarget Options\fR" 4
.IP "\fITarget Options\fR" 4
.IX Item "Target Options"
.IX Item "Target Options"
\&\fB\-V\fR \fIversion\fR  \fB\-b\fR \fImachine\fR
\&\fB\-V\fR \fIversion\fR  \fB\-b\fR \fImachine\fR
.IP "\fIMachine Dependent Options\fR" 4
.IP "\fIMachine Dependent Options\fR" 4
.IX Item "Machine Dependent Options"
.IX Item "Machine Dependent Options"
\&\fI\s-1ARC\s0 Options\fR
\&\fI\s-1ARC\s0 Options\fR
\&\fB\-EB  \-EL
\&\fB\-EB  \-EL
\&\-mmangle\-cpu  \-mcpu=\fR\fIcpu\fR  \fB\-mtext=\fR\fItext-section\fR
\&\-mmangle\-cpu  \-mcpu=\fR\fIcpu\fR  \fB\-mtext=\fR\fItext-section\fR
\&\fB\-mdata=\fR\fIdata-section\fR  \fB\-mrodata=\fR\fIreadonly-data-section\fR
\&\fB\-mdata=\fR\fIdata-section\fR  \fB\-mrodata=\fR\fIreadonly-data-section\fR
.Sp
.Sp
\&\fI\s-1ARM\s0 Options\fR
\&\fI\s-1ARM\s0 Options\fR
\&\fB\-mapcs\-frame  \-mno\-apcs\-frame
\&\fB\-mapcs\-frame  \-mno\-apcs\-frame
\&\-mabi=\fR\fIname\fR
\&\-mabi=\fR\fIname\fR
\&\fB\-mapcs\-stack\-check  \-mno\-apcs\-stack\-check
\&\fB\-mapcs\-stack\-check  \-mno\-apcs\-stack\-check
\&\-mapcs\-float  \-mno\-apcs\-float
\&\-mapcs\-float  \-mno\-apcs\-float
\&\-mapcs\-reentrant  \-mno\-apcs\-reentrant
\&\-mapcs\-reentrant  \-mno\-apcs\-reentrant
\&\-msched\-prolog  \-mno\-sched\-prolog
\&\-msched\-prolog  \-mno\-sched\-prolog
\&\-mlittle\-endian  \-mbig\-endian  \-mwords\-little\-endian
\&\-mlittle\-endian  \-mbig\-endian  \-mwords\-little\-endian
\&\-mfloat\-abi=\fR\fIname\fR  \fB\-msoft\-float  \-mhard\-float  \-mfpe
\&\-mfloat\-abi=\fR\fIname\fR  \fB\-msoft\-float  \-mhard\-float  \-mfpe
\&\-mfp16\-format=\fR\fIname\fR
\&\-mfp16\-format=\fR\fIname\fR
\&\fB\-mthumb\-interwork  \-mno\-thumb\-interwork
\&\fB\-mthumb\-interwork  \-mno\-thumb\-interwork
\&\-mcpu=\fR\fIname\fR  \fB\-march=\fR\fIname\fR  \fB\-mfpu=\fR\fIname\fR
\&\-mcpu=\fR\fIname\fR  \fB\-march=\fR\fIname\fR  \fB\-mfpu=\fR\fIname\fR
\&\fB\-mstructure\-size\-boundary=\fR\fIn\fR
\&\fB\-mstructure\-size\-boundary=\fR\fIn\fR
\&\fB\-mabort\-on\-noreturn
\&\fB\-mabort\-on\-noreturn
\&\-mlong\-calls  \-mno\-long\-calls
\&\-mlong\-calls  \-mno\-long\-calls
\&\-msingle\-pic\-base  \-mno\-single\-pic\-base
\&\-msingle\-pic\-base  \-mno\-single\-pic\-base
\&\-mpic\-register=\fR\fIreg\fR
\&\-mpic\-register=\fR\fIreg\fR
\&\fB\-mnop\-fun\-dllimport
\&\fB\-mnop\-fun\-dllimport
\&\-mcirrus\-fix\-invalid\-insns \-mno\-cirrus\-fix\-invalid\-insns
\&\-mcirrus\-fix\-invalid\-insns \-mno\-cirrus\-fix\-invalid\-insns
\&\-mpoke\-function\-name
\&\-mpoke\-function\-name
\&\-mthumb  \-marm
\&\-mthumb  \-marm
\&\-mtpcs\-frame  \-mtpcs\-leaf\-frame
\&\-mtpcs\-frame  \-mtpcs\-leaf\-frame
\&\-mcaller\-super\-interworking  \-mcallee\-super\-interworking
\&\-mcaller\-super\-interworking  \-mcallee\-super\-interworking
\&\-mtp=\fR\fIname\fR
\&\-mtp=\fR\fIname\fR
\&\fB\-mword\-relocations
\&\fB\-mword\-relocations
\&\-mfix\-cortex\-m3\-ldrd\fR
\&\-mfix\-cortex\-m3\-ldrd\fR
.Sp
.Sp
\&\fI\s-1AVR\s0 Options\fR
\&\fI\s-1AVR\s0 Options\fR
\&\fB\-mmcu=\fR\fImcu\fR  \fB\-mno\-interrupts
\&\fB\-mmcu=\fR\fImcu\fR  \fB\-mno\-interrupts
\&\-mcall\-prologues  \-mtiny\-stack  \-mint8\fR
\&\-mcall\-prologues  \-mtiny\-stack  \-mint8\fR
.Sp
.Sp
\&\fIBlackfin Options\fR
\&\fIBlackfin Options\fR
\&\fB\-mcpu=\fR\fIcpu\fR[\fB\-\fR\fIsirevision\fR]
\&\fB\-mcpu=\fR\fIcpu\fR[\fB\-\fR\fIsirevision\fR]
\&\fB\-msim \-momit\-leaf\-frame\-pointer  \-mno\-omit\-leaf\-frame\-pointer
\&\fB\-msim \-momit\-leaf\-frame\-pointer  \-mno\-omit\-leaf\-frame\-pointer
\&\-mspecld\-anomaly  \-mno\-specld\-anomaly  \-mcsync\-anomaly  \-mno\-csync\-anomaly
\&\-mspecld\-anomaly  \-mno\-specld\-anomaly  \-mcsync\-anomaly  \-mno\-csync\-anomaly
\&\-mlow\-64k \-mno\-low64k  \-mstack\-check\-l1  \-mid\-shared\-library
\&\-mlow\-64k \-mno\-low64k  \-mstack\-check\-l1  \-mid\-shared\-library
\&\-mno\-id\-shared\-library  \-mshared\-library\-id=\fR\fIn\fR
\&\-mno\-id\-shared\-library  \-mshared\-library\-id=\fR\fIn\fR
\&\fB\-mleaf\-id\-shared\-library  \-mno\-leaf\-id\-shared\-library
\&\fB\-mleaf\-id\-shared\-library  \-mno\-leaf\-id\-shared\-library
\&\-msep\-data  \-mno\-sep\-data  \-mlong\-calls  \-mno\-long\-calls
\&\-msep\-data  \-mno\-sep\-data  \-mlong\-calls  \-mno\-long\-calls
\&\-mfast\-fp \-minline\-plt \-mmulticore  \-mcorea  \-mcoreb  \-msdram
\&\-mfast\-fp \-minline\-plt \-mmulticore  \-mcorea  \-mcoreb  \-msdram
\&\-micplb\fR
\&\-micplb\fR
.Sp
.Sp
\&\fI\s-1CRIS\s0 Options\fR
\&\fI\s-1CRIS\s0 Options\fR
\&\fB\-mcpu=\fR\fIcpu\fR  \fB\-march=\fR\fIcpu\fR  \fB\-mtune=\fR\fIcpu\fR
\&\fB\-mcpu=\fR\fIcpu\fR  \fB\-march=\fR\fIcpu\fR  \fB\-mtune=\fR\fIcpu\fR
\&\fB\-mmax\-stack\-frame=\fR\fIn\fR  \fB\-melinux\-stacksize=\fR\fIn\fR
\&\fB\-mmax\-stack\-frame=\fR\fIn\fR  \fB\-melinux\-stacksize=\fR\fIn\fR
\&\fB\-metrax4  \-metrax100  \-mpdebug  \-mcc\-init  \-mno\-side\-effects
\&\fB\-metrax4  \-metrax100  \-mpdebug  \-mcc\-init  \-mno\-side\-effects
\&\-mstack\-align  \-mdata\-align  \-mconst\-align
\&\-mstack\-align  \-mdata\-align  \-mconst\-align
\&\-m32\-bit  \-m16\-bit  \-m8\-bit  \-mno\-prologue\-epilogue  \-mno\-gotplt
\&\-m32\-bit  \-m16\-bit  \-m8\-bit  \-mno\-prologue\-epilogue  \-mno\-gotplt
\&\-melf  \-maout  \-melinux  \-mlinux  \-sim  \-sim2
\&\-melf  \-maout  \-melinux  \-mlinux  \-sim  \-sim2
\&\-mmul\-bug\-workaround  \-mno\-mul\-bug\-workaround\fR
\&\-mmul\-bug\-workaround  \-mno\-mul\-bug\-workaround\fR
.Sp
.Sp
\&\fI\s-1CRX\s0 Options\fR
\&\fI\s-1CRX\s0 Options\fR
\&\fB\-mmac \-mpush\-args\fR
\&\fB\-mmac \-mpush\-args\fR
.Sp
.Sp
\&\fIDarwin Options\fR
\&\fIDarwin Options\fR
\&\fB\-all_load  \-allowable_client  \-arch  \-arch_errors_fatal
\&\fB\-all_load  \-allowable_client  \-arch  \-arch_errors_fatal
\&\-arch_only  \-bind_at_load  \-bundle  \-bundle_loader
\&\-arch_only  \-bind_at_load  \-bundle  \-bundle_loader
\&\-client_name  \-compatibility_version  \-current_version
\&\-client_name  \-compatibility_version  \-current_version
\&\-dead_strip
\&\-dead_strip
\&\-dependency\-file  \-dylib_file  \-dylinker_install_name
\&\-dependency\-file  \-dylib_file  \-dylinker_install_name
\&\-dynamic  \-dynamiclib  \-exported_symbols_list
\&\-dynamic  \-dynamiclib  \-exported_symbols_list
\&\-filelist  \-flat_namespace  \-force_cpusubtype_ALL
\&\-filelist  \-flat_namespace  \-force_cpusubtype_ALL
\&\-force_flat_namespace  \-headerpad_max_install_names
\&\-force_flat_namespace  \-headerpad_max_install_names
\&\-iframework
\&\-iframework
\&\-image_base  \-init  \-install_name  \-keep_private_externs
\&\-image_base  \-init  \-install_name  \-keep_private_externs
\&\-multi_module  \-multiply_defined  \-multiply_defined_unused
\&\-multi_module  \-multiply_defined  \-multiply_defined_unused
\&\-noall_load   \-no_dead_strip_inits_and_terms
\&\-noall_load   \-no_dead_strip_inits_and_terms
\&\-nofixprebinding \-nomultidefs  \-noprebind  \-noseglinkedit
\&\-nofixprebinding \-nomultidefs  \-noprebind  \-noseglinkedit
\&\-pagezero_size  \-prebind  \-prebind_all_twolevel_modules
\&\-pagezero_size  \-prebind  \-prebind_all_twolevel_modules
\&\-private_bundle  \-read_only_relocs  \-sectalign
\&\-private_bundle  \-read_only_relocs  \-sectalign
\&\-sectobjectsymbols  \-whyload  \-seg1addr
\&\-sectobjectsymbols  \-whyload  \-seg1addr
\&\-sectcreate  \-sectobjectsymbols  \-sectorder
\&\-sectcreate  \-sectobjectsymbols  \-sectorder
\&\-segaddr \-segs_read_only_addr \-segs_read_write_addr
\&\-segaddr \-segs_read_only_addr \-segs_read_write_addr
\&\-seg_addr_table  \-seg_addr_table_filename  \-seglinkedit
\&\-seg_addr_table  \-seg_addr_table_filename  \-seglinkedit
\&\-segprot  \-segs_read_only_addr  \-segs_read_write_addr
\&\-segprot  \-segs_read_only_addr  \-segs_read_write_addr
\&\-single_module  \-static  \-sub_library  \-sub_umbrella
\&\-single_module  \-static  \-sub_library  \-sub_umbrella
\&\-twolevel_namespace  \-umbrella  \-undefined
\&\-twolevel_namespace  \-umbrella  \-undefined
\&\-unexported_symbols_list  \-weak_reference_mismatches
\&\-unexported_symbols_list  \-weak_reference_mismatches
\&\-whatsloaded \-F \-gused \-gfull \-mmacosx\-version\-min=\fR\fIversion\fR
\&\-whatsloaded \-F \-gused \-gfull \-mmacosx\-version\-min=\fR\fIversion\fR
\&\fB\-mkernel \-mone\-byte\-bool\fR
\&\fB\-mkernel \-mone\-byte\-bool\fR
.Sp
.Sp
\&\fI\s-1DEC\s0 Alpha Options\fR
\&\fI\s-1DEC\s0 Alpha Options\fR
\&\fB\-mno\-fp\-regs  \-msoft\-float  \-malpha\-as  \-mgas
\&\fB\-mno\-fp\-regs  \-msoft\-float  \-malpha\-as  \-mgas
\&\-mieee  \-mieee\-with\-inexact  \-mieee\-conformant
\&\-mieee  \-mieee\-with\-inexact  \-mieee\-conformant
\&\-mfp\-trap\-mode=\fR\fImode\fR  \fB\-mfp\-rounding\-mode=\fR\fImode\fR
\&\-mfp\-trap\-mode=\fR\fImode\fR  \fB\-mfp\-rounding\-mode=\fR\fImode\fR
\&\fB\-mtrap\-precision=\fR\fImode\fR  \fB\-mbuild\-constants
\&\fB\-mtrap\-precision=\fR\fImode\fR  \fB\-mbuild\-constants
\&\-mcpu=\fR\fIcpu-type\fR  \fB\-mtune=\fR\fIcpu-type\fR
\&\-mcpu=\fR\fIcpu-type\fR  \fB\-mtune=\fR\fIcpu-type\fR
\&\fB\-mbwx  \-mmax  \-mfix  \-mcix
\&\fB\-mbwx  \-mmax  \-mfix  \-mcix
\&\-mfloat\-vax  \-mfloat\-ieee
\&\-mfloat\-vax  \-mfloat\-ieee
\&\-mexplicit\-relocs  \-msmall\-data  \-mlarge\-data
\&\-mexplicit\-relocs  \-msmall\-data  \-mlarge\-data
\&\-msmall\-text  \-mlarge\-text
\&\-msmall\-text  \-mlarge\-text
\&\-mmemory\-latency=\fR\fItime\fR
\&\-mmemory\-latency=\fR\fItime\fR
.Sp
.Sp
\&\fI\s-1DEC\s0 Alpha/VMS Options\fR
\&\fI\s-1DEC\s0 Alpha/VMS Options\fR
\&\fB\-mvms\-return\-codes \-mdebug\-main=\fR\fIprefix\fR \fB\-mmalloc64\fR
\&\fB\-mvms\-return\-codes \-mdebug\-main=\fR\fIprefix\fR \fB\-mmalloc64\fR
.Sp
.Sp
\&\fI\s-1FR30\s0 Options\fR
\&\fI\s-1FR30\s0 Options\fR
\&\fB\-msmall\-model \-mno\-lsim\fR
\&\fB\-msmall\-model \-mno\-lsim\fR
.Sp
.Sp
\&\fI\s-1FRV\s0 Options\fR
\&\fI\s-1FRV\s0 Options\fR
\&\fB\-mgpr\-32  \-mgpr\-64  \-mfpr\-32  \-mfpr\-64
\&\fB\-mgpr\-32  \-mgpr\-64  \-mfpr\-32  \-mfpr\-64
\&\-mhard\-float  \-msoft\-float
\&\-mhard\-float  \-msoft\-float
\&\-malloc\-cc  \-mfixed\-cc  \-mdword  \-mno\-dword
\&\-malloc\-cc  \-mfixed\-cc  \-mdword  \-mno\-dword
\&\-mdouble  \-mno\-double
\&\-mdouble  \-mno\-double
\&\-mmedia  \-mno\-media  \-mmuladd  \-mno\-muladd
\&\-mmedia  \-mno\-media  \-mmuladd  \-mno\-muladd
\&\-mfdpic  \-minline\-plt \-mgprel\-ro  \-multilib\-library\-pic
\&\-mfdpic  \-minline\-plt \-mgprel\-ro  \-multilib\-library\-pic
\&\-mlinked\-fp  \-mlong\-calls  \-malign\-labels
\&\-mlinked\-fp  \-mlong\-calls  \-malign\-labels
\&\-mlibrary\-pic  \-macc\-4  \-macc\-8
\&\-mlibrary\-pic  \-macc\-4  \-macc\-8
\&\-mpack  \-mno\-pack  \-mno\-eflags  \-mcond\-move  \-mno\-cond\-move
\&\-mpack  \-mno\-pack  \-mno\-eflags  \-mcond\-move  \-mno\-cond\-move
\&\-moptimize\-membar \-mno\-optimize\-membar
\&\-moptimize\-membar \-mno\-optimize\-membar
\&\-mscc  \-mno\-scc  \-mcond\-exec  \-mno\-cond\-exec
\&\-mscc  \-mno\-scc  \-mcond\-exec  \-mno\-cond\-exec
\&\-mvliw\-branch  \-mno\-vliw\-branch
\&\-mvliw\-branch  \-mno\-vliw\-branch
\&\-mmulti\-cond\-exec  \-mno\-multi\-cond\-exec  \-mnested\-cond\-exec
\&\-mmulti\-cond\-exec  \-mno\-multi\-cond\-exec  \-mnested\-cond\-exec
\&\-mno\-nested\-cond\-exec  \-mtomcat\-stats
\&\-mno\-nested\-cond\-exec  \-mtomcat\-stats
\&\-mTLS \-mtls
\&\-mTLS \-mtls
\&\-mcpu=\fR\fIcpu\fR
\&\-mcpu=\fR\fIcpu\fR
.Sp
.Sp
\&\fIGNU/Linux Options\fR
\&\fIGNU/Linux Options\fR
\&\fB\-muclibc\fR
\&\fB\-muclibc\fR
.Sp
.Sp
\&\fIH8/300 Options\fR
\&\fIH8/300 Options\fR
\&\fB\-mrelax  \-mh  \-ms  \-mn  \-mint32  \-malign\-300\fR
\&\fB\-mrelax  \-mh  \-ms  \-mn  \-mint32  \-malign\-300\fR
.Sp
.Sp
\&\fI\s-1HPPA\s0 Options\fR
\&\fI\s-1HPPA\s0 Options\fR
\&\fB\-march=\fR\fIarchitecture-type\fR
\&\fB\-march=\fR\fIarchitecture-type\fR
\&\fB\-mbig\-switch  \-mdisable\-fpregs  \-mdisable\-indexing
\&\fB\-mbig\-switch  \-mdisable\-fpregs  \-mdisable\-indexing
\&\-mfast\-indirect\-calls  \-mgas  \-mgnu\-ld   \-mhp\-ld
\&\-mfast\-indirect\-calls  \-mgas  \-mgnu\-ld   \-mhp\-ld
\&\-mfixed\-range=\fR\fIregister-range\fR
\&\-mfixed\-range=\fR\fIregister-range\fR
\&\fB\-mjump\-in\-delay \-mlinker\-opt \-mlong\-calls
\&\fB\-mjump\-in\-delay \-mlinker\-opt \-mlong\-calls
\&\-mlong\-load\-store  \-mno\-big\-switch  \-mno\-disable\-fpregs
\&\-mlong\-load\-store  \-mno\-big\-switch  \-mno\-disable\-fpregs
\&\-mno\-disable\-indexing  \-mno\-fast\-indirect\-calls  \-mno\-gas
\&\-mno\-disable\-indexing  \-mno\-fast\-indirect\-calls  \-mno\-gas
\&\-mno\-jump\-in\-delay  \-mno\-long\-load\-store
\&\-mno\-jump\-in\-delay  \-mno\-long\-load\-store
\&\-mno\-portable\-runtime  \-mno\-soft\-float
\&\-mno\-portable\-runtime  \-mno\-soft\-float
\&\-mno\-space\-regs  \-msoft\-float  \-mpa\-risc\-1\-0
\&\-mno\-space\-regs  \-msoft\-float  \-mpa\-risc\-1\-0
\&\-mpa\-risc\-1\-1  \-mpa\-risc\-2\-0  \-mportable\-runtime
\&\-mpa\-risc\-1\-1  \-mpa\-risc\-2\-0  \-mportable\-runtime
\&\-mschedule=\fR\fIcpu-type\fR  \fB\-mspace\-regs  \-msio  \-mwsio
\&\-mschedule=\fR\fIcpu-type\fR  \fB\-mspace\-regs  \-msio  \-mwsio
\&\-munix=\fR\fIunix-std\fR  \fB\-nolibdld  \-static  \-threads\fR
\&\-munix=\fR\fIunix-std\fR  \fB\-nolibdld  \-static  \-threads\fR
.Sp
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\&\fIi386 and x86\-64 Options\fR
\&\fIi386 and x86\-64 Options\fR
\&\fB\-mtune=\fR\fIcpu-type\fR  \fB\-march=\fR\fIcpu-type\fR
\&\fB\-mtune=\fR\fIcpu-type\fR  \fB\-march=\fR\fIcpu-type\fR
\&\fB\-mfpmath=\fR\fIunit\fR
\&\fB\-mfpmath=\fR\fIunit\fR
\&\fB\-masm=\fR\fIdialect\fR  \fB\-mno\-fancy\-math\-387
\&\fB\-masm=\fR\fIdialect\fR  \fB\-mno\-fancy\-math\-387
\&\-mno\-fp\-ret\-in\-387  \-msoft\-float
\&\-mno\-fp\-ret\-in\-387  \-msoft\-float
\&\-mno\-wide\-multiply  \-mrtd  \-malign\-double
\&\-mno\-wide\-multiply  \-mrtd  \-malign\-double
\&\-mpreferred\-stack\-boundary=\fR\fInum\fR
\&\-mpreferred\-stack\-boundary=\fR\fInum\fR
\&\fB\-mincoming\-stack\-boundary=\fR\fInum\fR
\&\fB\-mincoming\-stack\-boundary=\fR\fInum\fR
\&\fB\-mcld \-mcx16 \-msahf \-mmovbe \-mcrc32 \-mrecip
\&\fB\-mcld \-mcx16 \-msahf \-mmovbe \-mcrc32 \-mrecip
\&\-mmmx  \-msse  \-msse2 \-msse3 \-mssse3 \-msse4.1 \-msse4.2 \-msse4 \-mavx
\&\-mmmx  \-msse  \-msse2 \-msse3 \-mssse3 \-msse4.1 \-msse4.2 \-msse4 \-mavx
\&\-maes \-mpclmul \-mfused\-madd
\&\-maes \-mpclmul \-mfused\-madd
\&\-msse4a \-m3dnow \-mpopcnt \-mabm \-mfma4 \-mxop \-mlwp
\&\-msse4a \-m3dnow \-mpopcnt \-mabm \-mfma4 \-mxop \-mlwp
\&\-mthreads  \-mno\-align\-stringops  \-minline\-all\-stringops
\&\-mthreads  \-mno\-align\-stringops  \-minline\-all\-stringops
\&\-minline\-stringops\-dynamically \-mstringop\-strategy=\fR\fIalg\fR
\&\-minline\-stringops\-dynamically \-mstringop\-strategy=\fR\fIalg\fR
\&\fB\-mpush\-args  \-maccumulate\-outgoing\-args  \-m128bit\-long\-double
\&\fB\-mpush\-args  \-maccumulate\-outgoing\-args  \-m128bit\-long\-double
\&\-m96bit\-long\-double  \-mregparm=\fR\fInum\fR  \fB\-msseregparm
\&\-m96bit\-long\-double  \-mregparm=\fR\fInum\fR  \fB\-msseregparm
\&\-mveclibabi=\fR\fItype\fR \fB\-mpc32 \-mpc64 \-mpc80 \-mstackrealign
\&\-mveclibabi=\fR\fItype\fR \fB\-mpc32 \-mpc64 \-mpc80 \-mstackrealign
\&\-momit\-leaf\-frame\-pointer  \-mno\-red\-zone \-mno\-tls\-direct\-seg\-refs
\&\-momit\-leaf\-frame\-pointer  \-mno\-red\-zone \-mno\-tls\-direct\-seg\-refs
\&\-mcmodel=\fR\fIcode-model\fR \fB\-mabi=\fR\fIname\fR
\&\-mcmodel=\fR\fIcode-model\fR \fB\-mabi=\fR\fIname\fR
\&\fB\-m32  \-m64 \-mlarge\-data\-threshold=\fR\fInum\fR
\&\fB\-m32  \-m64 \-mlarge\-data\-threshold=\fR\fInum\fR
\&\fB\-msse2avx\fR
\&\fB\-msse2avx\fR
.Sp
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\&\fI\s-1IA\-64\s0 Options\fR
\&\fI\s-1IA\-64\s0 Options\fR
\&\fB\-mbig\-endian  \-mlittle\-endian  \-mgnu\-as  \-mgnu\-ld  \-mno\-pic
\&\fB\-mbig\-endian  \-mlittle\-endian  \-mgnu\-as  \-mgnu\-ld  \-mno\-pic
\&\-mvolatile\-asm\-stop  \-mregister\-names  \-msdata \-mno\-sdata
\&\-mvolatile\-asm\-stop  \-mregister\-names  \-msdata \-mno\-sdata
\&\-mconstant\-gp  \-mauto\-pic  \-mfused\-madd
\&\-mconstant\-gp  \-mauto\-pic  \-mfused\-madd
\&\-minline\-float\-divide\-min\-latency
\&\-minline\-float\-divide\-min\-latency
\&\-minline\-float\-divide\-max\-throughput
\&\-minline\-float\-divide\-max\-throughput
\&\-mno\-inline\-float\-divide
\&\-mno\-inline\-float\-divide
\&\-minline\-int\-divide\-min\-latency
\&\-minline\-int\-divide\-min\-latency
\&\-minline\-int\-divide\-max\-throughput
\&\-minline\-int\-divide\-max\-throughput
\&\-mno\-inline\-int\-divide
\&\-mno\-inline\-int\-divide
\&\-minline\-sqrt\-min\-latency \-minline\-sqrt\-max\-throughput
\&\-minline\-sqrt\-min\-latency \-minline\-sqrt\-max\-throughput
\&\-mno\-inline\-sqrt
\&\-mno\-inline\-sqrt
\&\-mdwarf2\-asm \-mearly\-stop\-bits
\&\-mdwarf2\-asm \-mearly\-stop\-bits
\&\-mfixed\-range=\fR\fIregister-range\fR \fB\-mtls\-size=\fR\fItls-size\fR
\&\-mfixed\-range=\fR\fIregister-range\fR \fB\-mtls\-size=\fR\fItls-size\fR
\&\fB\-mtune=\fR\fIcpu-type\fR \fB\-milp32 \-mlp64
\&\fB\-mtune=\fR\fIcpu-type\fR \fB\-milp32 \-mlp64
\&\-msched\-br\-data\-spec \-msched\-ar\-data\-spec \-msched\-control\-spec
\&\-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\-br\-in\-data\-spec \-msched\-ar\-in\-data\-spec \-msched\-in\-control\-spec
\&\-msched\-spec\-ldc \-msched\-spec\-control\-ldc
\&\-msched\-spec\-ldc \-msched\-spec\-control\-ldc
\&\-msched\-prefer\-non\-data\-spec\-insns \-msched\-prefer\-non\-control\-spec\-insns
\&\-msched\-prefer\-non\-data\-spec\-insns \-msched\-prefer\-non\-control\-spec\-insns
\&\-msched\-stop\-bits\-after\-every\-cycle \-msched\-count\-spec\-in\-critical\-path
\&\-msched\-stop\-bits\-after\-every\-cycle \-msched\-count\-spec\-in\-critical\-path
\&\-msel\-sched\-dont\-check\-control\-spec \-msched\-fp\-mem\-deps\-zero\-cost
\&\-msel\-sched\-dont\-check\-control\-spec \-msched\-fp\-mem\-deps\-zero\-cost
\&\-msched\-max\-memory\-insns\-hard\-limit \-msched\-max\-memory\-insns=\fR\fImax-insns\fR
\&\-msched\-max\-memory\-insns\-hard\-limit \-msched\-max\-memory\-insns=\fR\fImax-insns\fR
.Sp
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\&\fI\s-1IA\-64/VMS\s0 Options\fR
\&\fI\s-1IA\-64/VMS\s0 Options\fR
\&\fB\-mvms\-return\-codes \-mdebug\-main=\fR\fIprefix\fR \fB\-mmalloc64\fR
\&\fB\-mvms\-return\-codes \-mdebug\-main=\fR\fIprefix\fR \fB\-mmalloc64\fR
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\&\fI\s-1LM32\s0 Options\fR
\&\fI\s-1LM32\s0 Options\fR
\&\fB\-mbarrel\-shift\-enabled \-mdivide\-enabled \-mmultiply\-enabled
\&\fB\-mbarrel\-shift\-enabled \-mdivide\-enabled \-mmultiply\-enabled
\&\-msign\-extend\-enabled \-muser\-enabled\fR
\&\-msign\-extend\-enabled \-muser\-enabled\fR
.Sp
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\&\fIM32R/D Options\fR
\&\fIM32R/D Options\fR
\&\fB\-m32r2 \-m32rx \-m32r
\&\fB\-m32r2 \-m32rx \-m32r
\&\-mdebug
\&\-mdebug
\&\-malign\-loops \-mno\-align\-loops
\&\-malign\-loops \-mno\-align\-loops
\&\-missue\-rate=\fR\fInumber\fR
\&\-missue\-rate=\fR\fInumber\fR
\&\fB\-mbranch\-cost=\fR\fInumber\fR
\&\fB\-mbranch\-cost=\fR\fInumber\fR
\&\fB\-mmodel=\fR\fIcode-size-model-type\fR
\&\fB\-mmodel=\fR\fIcode-size-model-type\fR
\&\fB\-msdata=\fR\fIsdata-type\fR
\&\fB\-msdata=\fR\fIsdata-type\fR
\&\fB\-mno\-flush\-func \-mflush\-func=\fR\fIname\fR
\&\fB\-mno\-flush\-func \-mflush\-func=\fR\fIname\fR
\&\fB\-mno\-flush\-trap \-mflush\-trap=\fR\fInumber\fR
\&\fB\-mno\-flush\-trap \-mflush\-trap=\fR\fInumber\fR
\&\fB\-G\fR \fInum\fR
\&\fB\-G\fR \fInum\fR
.Sp
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\&\fIM32C Options\fR
\&\fIM32C Options\fR
\&\fB\-mcpu=\fR\fIcpu\fR \fB\-msim \-memregs=\fR\fInumber\fR
\&\fB\-mcpu=\fR\fIcpu\fR \fB\-msim \-memregs=\fR\fInumber\fR
.Sp
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\&\fIM680x0 Options\fR
\&\fIM680x0 Options\fR
\&\fB\-march=\fR\fIarch\fR  \fB\-mcpu=\fR\fIcpu\fR  \fB\-mtune=\fR\fItune\fR
\&\fB\-march=\fR\fIarch\fR  \fB\-mcpu=\fR\fIcpu\fR  \fB\-mtune=\fR\fItune\fR
\&\fB\-m68000  \-m68020  \-m68020\-40  \-m68020\-60  \-m68030  \-m68040
\&\fB\-m68000  \-m68020  \-m68020\-40  \-m68020\-60  \-m68030  \-m68040
\&\-m68060  \-mcpu32  \-m5200  \-m5206e  \-m528x  \-m5307  \-m5407
\&\-m68060  \-mcpu32  \-m5200  \-m5206e  \-m528x  \-m5307  \-m5407
\&\-mcfv4e  \-mbitfield  \-mno\-bitfield  \-mc68000  \-mc68020
\&\-mcfv4e  \-mbitfield  \-mno\-bitfield  \-mc68000  \-mc68020
\&\-mnobitfield  \-mrtd  \-mno\-rtd  \-mdiv  \-mno\-div  \-mshort
\&\-mnobitfield  \-mrtd  \-mno\-rtd  \-mdiv  \-mno\-div  \-mshort
\&\-mno\-short  \-mhard\-float  \-m68881  \-msoft\-float  \-mpcrel
\&\-mno\-short  \-mhard\-float  \-m68881  \-msoft\-float  \-mpcrel
\&\-malign\-int  \-mstrict\-align  \-msep\-data  \-mno\-sep\-data
\&\-malign\-int  \-mstrict\-align  \-msep\-data  \-mno\-sep\-data
\&\-mshared\-library\-id=n  \-mid\-shared\-library  \-mno\-id\-shared\-library
\&\-mshared\-library\-id=n  \-mid\-shared\-library  \-mno\-id\-shared\-library
\&\-mxgot \-mno\-xgot\fR
\&\-mxgot \-mno\-xgot\fR
.Sp
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\&\fIM68hc1x Options\fR
\&\fIM68hc1x Options\fR
\&\fB\-m6811  \-m6812  \-m68hc11  \-m68hc12   \-m68hcs12
\&\fB\-m6811  \-m6812  \-m68hc11  \-m68hc12   \-m68hcs12
\&\-mauto\-incdec  \-minmax  \-mlong\-calls  \-mshort
\&\-mauto\-incdec  \-minmax  \-mlong\-calls  \-mshort
\&\-msoft\-reg\-count=\fR\fIcount\fR
\&\-msoft\-reg\-count=\fR\fIcount\fR
.Sp
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\&\fIMCore Options\fR
\&\fIMCore Options\fR
\&\fB\-mhardlit  \-mno\-hardlit  \-mdiv  \-mno\-div  \-mrelax\-immediates
\&\fB\-mhardlit  \-mno\-hardlit  \-mdiv  \-mno\-div  \-mrelax\-immediates
\&\-mno\-relax\-immediates  \-mwide\-bitfields  \-mno\-wide\-bitfields
\&\-mno\-relax\-immediates  \-mwide\-bitfields  \-mno\-wide\-bitfields
\&\-m4byte\-functions  \-mno\-4byte\-functions  \-mcallgraph\-data
\&\-m4byte\-functions  \-mno\-4byte\-functions  \-mcallgraph\-data
\&\-mno\-callgraph\-data  \-mslow\-bytes  \-mno\-slow\-bytes  \-mno\-lsim
\&\-mno\-callgraph\-data  \-mslow\-bytes  \-mno\-slow\-bytes  \-mno\-lsim
\&\-mlittle\-endian  \-mbig\-endian  \-m210  \-m340  \-mstack\-increment\fR
\&\-mlittle\-endian  \-mbig\-endian  \-m210  \-m340  \-mstack\-increment\fR
.Sp
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\&\fIMeP Options\fR
\&\fIMeP Options\fR
\&\fB\-mabsdiff \-mall\-opts \-maverage \-mbased=\fR\fIn\fR \fB\-mbitops
\&\fB\-mabsdiff \-mall\-opts \-maverage \-mbased=\fR\fIn\fR \fB\-mbitops
\&\-mc=\fR\fIn\fR \fB\-mclip \-mconfig=\fR\fIname\fR \fB\-mcop \-mcop32 \-mcop64 \-mivc2
\&\-mc=\fR\fIn\fR \fB\-mclip \-mconfig=\fR\fIname\fR \fB\-mcop \-mcop32 \-mcop64 \-mivc2
\&\-mdc \-mdiv \-meb \-mel \-mio\-volatile \-ml \-mleadz \-mm \-mminmax
\&\-mdc \-mdiv \-meb \-mel \-mio\-volatile \-ml \-mleadz \-mm \-mminmax
\&\-mmult \-mno\-opts \-mrepeat \-ms \-msatur \-msdram \-msim \-msimnovec \-mtf
\&\-mmult \-mno\-opts \-mrepeat \-ms \-msatur \-msdram \-msim \-msimnovec \-mtf
\&\-mtiny=\fR\fIn\fR
\&\-mtiny=\fR\fIn\fR
.Sp
.Sp
\&\fI\s-1MIPS\s0 Options\fR
\&\fI\s-1MIPS\s0 Options\fR
\&\fB\-EL  \-EB  \-march=\fR\fIarch\fR  \fB\-mtune=\fR\fIarch\fR
\&\fB\-EL  \-EB  \-march=\fR\fIarch\fR  \fB\-mtune=\fR\fIarch\fR
\&\fB\-mips1  \-mips2  \-mips3  \-mips4  \-mips32  \-mips32r2
\&\fB\-mips1  \-mips2  \-mips3  \-mips4  \-mips32  \-mips32r2
\&\-mips64  \-mips64r2
\&\-mips64  \-mips64r2
\&\-mips16  \-mno\-mips16  \-mflip\-mips16
\&\-mips16  \-mno\-mips16  \-mflip\-mips16
\&\-minterlink\-mips16  \-mno\-interlink\-mips16
\&\-minterlink\-mips16  \-mno\-interlink\-mips16
\&\-mabi=\fR\fIabi\fR  \fB\-mabicalls  \-mno\-abicalls
\&\-mabi=\fR\fIabi\fR  \fB\-mabicalls  \-mno\-abicalls
\&\-mshared  \-mno\-shared  \-mplt  \-mno\-plt  \-mxgot  \-mno\-xgot
\&\-mshared  \-mno\-shared  \-mplt  \-mno\-plt  \-mxgot  \-mno\-xgot
\&\-mgp32  \-mgp64  \-mfp32  \-mfp64  \-mhard\-float  \-msoft\-float
\&\-mgp32  \-mgp64  \-mfp32  \-mfp64  \-mhard\-float  \-msoft\-float
\&\-msingle\-float  \-mdouble\-float  \-mdsp  \-mno\-dsp  \-mdspr2  \-mno\-dspr2
\&\-msingle\-float  \-mdouble\-float  \-mdsp  \-mno\-dsp  \-mdspr2  \-mno\-dspr2
\&\-mfpu=\fR\fIfpu-type\fR
\&\-mfpu=\fR\fIfpu-type\fR
\&\fB\-msmartmips  \-mno\-smartmips
\&\fB\-msmartmips  \-mno\-smartmips
\&\-mpaired\-single  \-mno\-paired\-single  \-mdmx  \-mno\-mdmx
\&\-mpaired\-single  \-mno\-paired\-single  \-mdmx  \-mno\-mdmx
\&\-mips3d  \-mno\-mips3d  \-mmt  \-mno\-mt  \-mllsc  \-mno\-llsc
\&\-mips3d  \-mno\-mips3d  \-mmt  \-mno\-mt  \-mllsc  \-mno\-llsc
\&\-mlong64  \-mlong32  \-msym32  \-mno\-sym32
\&\-mlong64  \-mlong32  \-msym32  \-mno\-sym32
\&\-G\fR\fInum\fR  \fB\-mlocal\-sdata  \-mno\-local\-sdata
\&\-G\fR\fInum\fR  \fB\-mlocal\-sdata  \-mno\-local\-sdata
\&\-mextern\-sdata  \-mno\-extern\-sdata  \-mgpopt  \-mno\-gopt
\&\-mextern\-sdata  \-mno\-extern\-sdata  \-mgpopt  \-mno\-gopt
\&\-membedded\-data  \-mno\-embedded\-data
\&\-membedded\-data  \-mno\-embedded\-data
\&\-muninit\-const\-in\-rodata  \-mno\-uninit\-const\-in\-rodata
\&\-muninit\-const\-in\-rodata  \-mno\-uninit\-const\-in\-rodata
\&\-mcode\-readable=\fR\fIsetting\fR
\&\-mcode\-readable=\fR\fIsetting\fR
\&\fB\-msplit\-addresses  \-mno\-split\-addresses
\&\fB\-msplit\-addresses  \-mno\-split\-addresses
\&\-mexplicit\-relocs  \-mno\-explicit\-relocs
\&\-mexplicit\-relocs  \-mno\-explicit\-relocs
\&\-mcheck\-zero\-division  \-mno\-check\-zero\-division
\&\-mcheck\-zero\-division  \-mno\-check\-zero\-division
\&\-mdivide\-traps  \-mdivide\-breaks
\&\-mdivide\-traps  \-mdivide\-breaks
\&\-mmemcpy  \-mno\-memcpy  \-mlong\-calls  \-mno\-long\-calls
\&\-mmemcpy  \-mno\-memcpy  \-mlong\-calls  \-mno\-long\-calls
\&\-mmad  \-mno\-mad  \-mfused\-madd  \-mno\-fused\-madd  \-nocpp
\&\-mmad  \-mno\-mad  \-mfused\-madd  \-mno\-fused\-madd  \-nocpp
\&\-mfix\-r4000  \-mno\-fix\-r4000  \-mfix\-r4400  \-mno\-fix\-r4400
\&\-mfix\-r4000  \-mno\-fix\-r4000  \-mfix\-r4400  \-mno\-fix\-r4400
\&\-mfix\-r10000 \-mno\-fix\-r10000  \-mfix\-vr4120  \-mno\-fix\-vr4120
\&\-mfix\-r10000 \-mno\-fix\-r10000  \-mfix\-vr4120  \-mno\-fix\-vr4120
\&\-mfix\-vr4130  \-mno\-fix\-vr4130  \-mfix\-sb1  \-mno\-fix\-sb1
\&\-mfix\-vr4130  \-mno\-fix\-vr4130  \-mfix\-sb1  \-mno\-fix\-sb1
\&\-mflush\-func=\fR\fIfunc\fR  \fB\-mno\-flush\-func
\&\-mflush\-func=\fR\fIfunc\fR  \fB\-mno\-flush\-func
\&\-mbranch\-cost=\fR\fInum\fR  \fB\-mbranch\-likely  \-mno\-branch\-likely
\&\-mbranch\-cost=\fR\fInum\fR  \fB\-mbranch\-likely  \-mno\-branch\-likely
\&\-mfp\-exceptions \-mno\-fp\-exceptions
\&\-mfp\-exceptions \-mno\-fp\-exceptions
\&\-mvr4130\-align \-mno\-vr4130\-align \-msynci \-mno\-synci
\&\-mvr4130\-align \-mno\-vr4130\-align \-msynci \-mno\-synci
\&\-mrelax\-pic\-calls \-mno\-relax\-pic\-calls \-mmcount\-ra\-address\fR
\&\-mrelax\-pic\-calls \-mno\-relax\-pic\-calls \-mmcount\-ra\-address\fR
.Sp
.Sp
\&\fI\s-1MMIX\s0 Options\fR
\&\fI\s-1MMIX\s0 Options\fR
\&\fB\-mlibfuncs  \-mno\-libfuncs  \-mepsilon  \-mno\-epsilon  \-mabi=gnu
\&\fB\-mlibfuncs  \-mno\-libfuncs  \-mepsilon  \-mno\-epsilon  \-mabi=gnu
\&\-mabi=mmixware  \-mzero\-extend  \-mknuthdiv  \-mtoplevel\-symbols
\&\-mabi=mmixware  \-mzero\-extend  \-mknuthdiv  \-mtoplevel\-symbols
\&\-melf  \-mbranch\-predict  \-mno\-branch\-predict  \-mbase\-addresses
\&\-melf  \-mbranch\-predict  \-mno\-branch\-predict  \-mbase\-addresses
\&\-mno\-base\-addresses  \-msingle\-exit  \-mno\-single\-exit\fR
\&\-mno\-base\-addresses  \-msingle\-exit  \-mno\-single\-exit\fR
.Sp
.Sp
\&\fI\s-1MN10300\s0 Options\fR
\&\fI\s-1MN10300\s0 Options\fR
\&\fB\-mmult\-bug  \-mno\-mult\-bug
\&\fB\-mmult\-bug  \-mno\-mult\-bug
\&\-mam33  \-mno\-am33
\&\-mam33  \-mno\-am33
\&\-mam33\-2  \-mno\-am33\-2
\&\-mam33\-2  \-mno\-am33\-2
\&\-mreturn\-pointer\-on\-d0
\&\-mreturn\-pointer\-on\-d0
\&\-mno\-crt0  \-mrelax\fR
\&\-mno\-crt0  \-mrelax\fR
.Sp
.Sp
\&\fI\s-1PDP\-11\s0 Options\fR
\&\fI\s-1PDP\-11\s0 Options\fR
\&\fB\-mfpu  \-msoft\-float  \-mac0  \-mno\-ac0  \-m40  \-m45  \-m10
\&\fB\-mfpu  \-msoft\-float  \-mac0  \-mno\-ac0  \-m40  \-m45  \-m10
\&\-mbcopy  \-mbcopy\-builtin  \-mint32  \-mno\-int16
\&\-mbcopy  \-mbcopy\-builtin  \-mint32  \-mno\-int16
\&\-mint16  \-mno\-int32  \-mfloat32  \-mno\-float64
\&\-mint16  \-mno\-int32  \-mfloat32  \-mno\-float64
\&\-mfloat64  \-mno\-float32  \-mabshi  \-mno\-abshi
\&\-mfloat64  \-mno\-float32  \-mabshi  \-mno\-abshi
\&\-mbranch\-expensive  \-mbranch\-cheap
\&\-mbranch\-expensive  \-mbranch\-cheap
\&\-msplit  \-mno\-split  \-munix\-asm  \-mdec\-asm\fR
\&\-msplit  \-mno\-split  \-munix\-asm  \-mdec\-asm\fR
.Sp
.Sp
\&\fIpicoChip Options\fR
\&\fIpicoChip Options\fR
\&\fB\-mae=\fR\fIae_type\fR \fB\-mvliw\-lookahead=\fR\fIN\fR
\&\fB\-mae=\fR\fIae_type\fR \fB\-mvliw\-lookahead=\fR\fIN\fR
\&\fB\-msymbol\-as\-address \-mno\-inefficient\-warnings\fR
\&\fB\-msymbol\-as\-address \-mno\-inefficient\-warnings\fR
.Sp
.Sp
\&\fIPowerPC Options\fR
\&\fIPowerPC Options\fR
See \s-1RS/6000\s0 and PowerPC Options.
See \s-1RS/6000\s0 and PowerPC Options.
.Sp
.Sp
\&\fI\s-1RS/6000\s0 and PowerPC Options\fR
\&\fI\s-1RS/6000\s0 and PowerPC Options\fR
\&\fB\-mcpu=\fR\fIcpu-type\fR
\&\fB\-mcpu=\fR\fIcpu-type\fR
\&\fB\-mtune=\fR\fIcpu-type\fR
\&\fB\-mtune=\fR\fIcpu-type\fR
\&\fB\-mpower  \-mno\-power  \-mpower2  \-mno\-power2
\&\fB\-mpower  \-mno\-power  \-mpower2  \-mno\-power2
\&\-mpowerpc  \-mpowerpc64  \-mno\-powerpc
\&\-mpowerpc  \-mpowerpc64  \-mno\-powerpc
\&\-maltivec  \-mno\-altivec
\&\-maltivec  \-mno\-altivec
\&\-mpowerpc\-gpopt  \-mno\-powerpc\-gpopt
\&\-mpowerpc\-gpopt  \-mno\-powerpc\-gpopt
\&\-mpowerpc\-gfxopt  \-mno\-powerpc\-gfxopt
\&\-mpowerpc\-gfxopt  \-mno\-powerpc\-gfxopt
\&\-mmfcrf  \-mno\-mfcrf  \-mpopcntb  \-mno\-popcntb \-mpopcntd \-mno\-popcntd
\&\-mmfcrf  \-mno\-mfcrf  \-mpopcntb  \-mno\-popcntb \-mpopcntd \-mno\-popcntd
\&\-mfprnd  \-mno\-fprnd
\&\-mfprnd  \-mno\-fprnd
\&\-mcmpb \-mno\-cmpb \-mmfpgpr \-mno\-mfpgpr \-mhard\-dfp \-mno\-hard\-dfp
\&\-mcmpb \-mno\-cmpb \-mmfpgpr \-mno\-mfpgpr \-mhard\-dfp \-mno\-hard\-dfp
\&\-mnew\-mnemonics  \-mold\-mnemonics
\&\-mnew\-mnemonics  \-mold\-mnemonics
\&\-mfull\-toc   \-mminimal\-toc  \-mno\-fp\-in\-toc  \-mno\-sum\-in\-toc
\&\-mfull\-toc   \-mminimal\-toc  \-mno\-fp\-in\-toc  \-mno\-sum\-in\-toc
\&\-m64  \-m32  \-mxl\-compat  \-mno\-xl\-compat  \-mpe
\&\-m64  \-m32  \-mxl\-compat  \-mno\-xl\-compat  \-mpe
\&\-malign\-power  \-malign\-natural
\&\-malign\-power  \-malign\-natural
\&\-msoft\-float  \-mhard\-float  \-mmultiple  \-mno\-multiple
\&\-msoft\-float  \-mhard\-float  \-mmultiple  \-mno\-multiple
\&\-msingle\-float \-mdouble\-float \-msimple\-fpu
\&\-msingle\-float \-mdouble\-float \-msimple\-fpu
\&\-mstring  \-mno\-string  \-mupdate  \-mno\-update
\&\-mstring  \-mno\-string  \-mupdate  \-mno\-update
\&\-mavoid\-indexed\-addresses  \-mno\-avoid\-indexed\-addresses
\&\-mavoid\-indexed\-addresses  \-mno\-avoid\-indexed\-addresses
\&\-mfused\-madd  \-mno\-fused\-madd  \-mbit\-align  \-mno\-bit\-align
\&\-mfused\-madd  \-mno\-fused\-madd  \-mbit\-align  \-mno\-bit\-align
\&\-mstrict\-align  \-mno\-strict\-align  \-mrelocatable
\&\-mstrict\-align  \-mno\-strict\-align  \-mrelocatable
\&\-mno\-relocatable  \-mrelocatable\-lib  \-mno\-relocatable\-lib
\&\-mno\-relocatable  \-mrelocatable\-lib  \-mno\-relocatable\-lib
\&\-mtoc  \-mno\-toc  \-mlittle  \-mlittle\-endian  \-mbig  \-mbig\-endian
\&\-mtoc  \-mno\-toc  \-mlittle  \-mlittle\-endian  \-mbig  \-mbig\-endian
\&\-mdynamic\-no\-pic  \-maltivec \-mswdiv
\&\-mdynamic\-no\-pic  \-maltivec \-mswdiv
\&\-mprioritize\-restricted\-insns=\fR\fIpriority\fR
\&\-mprioritize\-restricted\-insns=\fR\fIpriority\fR
\&\fB\-msched\-costly\-dep=\fR\fIdependence_type\fR
\&\fB\-msched\-costly\-dep=\fR\fIdependence_type\fR
\&\fB\-minsert\-sched\-nops=\fR\fIscheme\fR
\&\fB\-minsert\-sched\-nops=\fR\fIscheme\fR
\&\fB\-mcall\-sysv  \-mcall\-netbsd
\&\fB\-mcall\-sysv  \-mcall\-netbsd
\&\-maix\-struct\-return  \-msvr4\-struct\-return
\&\-maix\-struct\-return  \-msvr4\-struct\-return
\&\-mabi=\fR\fIabi-type\fR \fB\-msecure\-plt \-mbss\-plt
\&\-mabi=\fR\fIabi-type\fR \fB\-msecure\-plt \-mbss\-plt
\&\-misel \-mno\-isel
\&\-misel \-mno\-isel
\&\-misel=yes  \-misel=no
\&\-misel=yes  \-misel=no
\&\-mspe \-mno\-spe
\&\-mspe \-mno\-spe
\&\-mspe=yes  \-mspe=no
\&\-mspe=yes  \-mspe=no
\&\-mpaired
\&\-mpaired
\&\-mgen\-cell\-microcode \-mwarn\-cell\-microcode
\&\-mgen\-cell\-microcode \-mwarn\-cell\-microcode
\&\-mvrsave \-mno\-vrsave
\&\-mvrsave \-mno\-vrsave
\&\-mmulhw \-mno\-mulhw
\&\-mmulhw \-mno\-mulhw
\&\-mdlmzb \-mno\-dlmzb
\&\-mdlmzb \-mno\-dlmzb
\&\-mfloat\-gprs=yes  \-mfloat\-gprs=no \-mfloat\-gprs=single \-mfloat\-gprs=double
\&\-mfloat\-gprs=yes  \-mfloat\-gprs=no \-mfloat\-gprs=single \-mfloat\-gprs=double
\&\-mprototype  \-mno\-prototype
\&\-mprototype  \-mno\-prototype
\&\-msim  \-mmvme  \-mads  \-myellowknife  \-memb  \-msdata
\&\-msim  \-mmvme  \-mads  \-myellowknife  \-memb  \-msdata
\&\-msdata=\fR\fIopt\fR  \fB\-mvxworks  \-G\fR \fInum\fR  \fB\-pthread\fR
\&\-msdata=\fR\fIopt\fR  \fB\-mvxworks  \-G\fR \fInum\fR  \fB\-pthread\fR
.Sp
.Sp
\&\fI\s-1RX\s0 Options\fR
\&\fI\s-1RX\s0 Options\fR
\&\fB\-m64bit\-doubles  \-m32bit\-doubles  \-fpu  \-nofpu
\&\fB\-m64bit\-doubles  \-m32bit\-doubles  \-fpu  \-nofpu
\&\-mcpu= \-patch=
\&\-mcpu= \-patch=
\&\-mbig\-endian\-data \-mlittle\-endian\-data
\&\-mbig\-endian\-data \-mlittle\-endian\-data
\&\-msmall\-data
\&\-msmall\-data
\&\-msim  \-mno\-sim
\&\-msim  \-mno\-sim
\&\-mas100\-syntax \-mno\-as100\-syntax
\&\-mas100\-syntax \-mno\-as100\-syntax
\&\-mrelax
\&\-mrelax
\&\-mmax\-constant\-size=
\&\-mmax\-constant\-size=
\&\-mint\-register=
\&\-mint\-register=
\&\-msave\-acc\-in\-interrupts\fR
\&\-msave\-acc\-in\-interrupts\fR
.Sp
.Sp
\&\fIS/390 and zSeries Options\fR
\&\fIS/390 and zSeries Options\fR
\&\fB\-mtune=\fR\fIcpu-type\fR  \fB\-march=\fR\fIcpu-type\fR
\&\fB\-mtune=\fR\fIcpu-type\fR  \fB\-march=\fR\fIcpu-type\fR
\&\fB\-mhard\-float  \-msoft\-float  \-mhard\-dfp \-mno\-hard\-dfp
\&\fB\-mhard\-float  \-msoft\-float  \-mhard\-dfp \-mno\-hard\-dfp
\&\-mlong\-double\-64 \-mlong\-double\-128
\&\-mlong\-double\-64 \-mlong\-double\-128
\&\-mbackchain  \-mno\-backchain \-mpacked\-stack  \-mno\-packed\-stack
\&\-mbackchain  \-mno\-backchain \-mpacked\-stack  \-mno\-packed\-stack
\&\-msmall\-exec  \-mno\-small\-exec  \-mmvcle \-mno\-mvcle
\&\-msmall\-exec  \-mno\-small\-exec  \-mmvcle \-mno\-mvcle
\&\-m64  \-m31  \-mdebug  \-mno\-debug  \-mesa  \-mzarch
\&\-m64  \-m31  \-mdebug  \-mno\-debug  \-mesa  \-mzarch
\&\-mtpf\-trace \-mno\-tpf\-trace  \-mfused\-madd  \-mno\-fused\-madd
\&\-mtpf\-trace \-mno\-tpf\-trace  \-mfused\-madd  \-mno\-fused\-madd
\&\-mwarn\-framesize  \-mwarn\-dynamicstack  \-mstack\-size \-mstack\-guard\fR
\&\-mwarn\-framesize  \-mwarn\-dynamicstack  \-mstack\-size \-mstack\-guard\fR
.Sp
.Sp
\&\fIScore Options\fR
\&\fIScore Options\fR
\&\fB\-meb \-mel
\&\fB\-meb \-mel
\&\-mnhwloop
\&\-mnhwloop
\&\-muls
\&\-muls
\&\-mmac
\&\-mmac
\&\-mscore5 \-mscore5u \-mscore7 \-mscore7d\fR
\&\-mscore5 \-mscore5u \-mscore7 \-mscore7d\fR
.Sp
.Sp
\&\fI\s-1SH\s0 Options\fR
\&\fI\s-1SH\s0 Options\fR
\&\fB\-m1  \-m2  \-m2e
\&\fB\-m1  \-m2  \-m2e
\&\-m2a\-nofpu \-m2a\-single\-only \-m2a\-single \-m2a
\&\-m2a\-nofpu \-m2a\-single\-only \-m2a\-single \-m2a
\&\-m3  \-m3e
\&\-m3  \-m3e
\&\-m4\-nofpu  \-m4\-single\-only  \-m4\-single  \-m4
\&\-m4\-nofpu  \-m4\-single\-only  \-m4\-single  \-m4
\&\-m4a\-nofpu \-m4a\-single\-only \-m4a\-single \-m4a \-m4al
\&\-m4a\-nofpu \-m4a\-single\-only \-m4a\-single \-m4a \-m4al
\&\-m5\-64media  \-m5\-64media\-nofpu
\&\-m5\-64media  \-m5\-64media\-nofpu
\&\-m5\-32media  \-m5\-32media\-nofpu
\&\-m5\-32media  \-m5\-32media\-nofpu
\&\-m5\-compact  \-m5\-compact\-nofpu
\&\-m5\-compact  \-m5\-compact\-nofpu
\&\-mb  \-ml  \-mdalign  \-mrelax
\&\-mb  \-ml  \-mdalign  \-mrelax
\&\-mbigtable \-mfmovd \-mhitachi \-mrenesas \-mno\-renesas \-mnomacsave
\&\-mbigtable \-mfmovd \-mhitachi \-mrenesas \-mno\-renesas \-mnomacsave
\&\-mieee  \-mbitops  \-misize  \-minline\-ic_invalidate \-mpadstruct  \-mspace
\&\-mieee  \-mbitops  \-misize  \-minline\-ic_invalidate \-mpadstruct  \-mspace
\&\-mprefergot  \-musermode \-multcost=\fR\fInumber\fR \fB\-mdiv=\fR\fIstrategy\fR
\&\-mprefergot  \-musermode \-multcost=\fR\fInumber\fR \fB\-mdiv=\fR\fIstrategy\fR
\&\fB\-mdivsi3_libfunc=\fR\fIname\fR \fB\-mfixed\-range=\fR\fIregister-range\fR
\&\fB\-mdivsi3_libfunc=\fR\fIname\fR \fB\-mfixed\-range=\fR\fIregister-range\fR
\&\fB\-madjust\-unroll \-mindexed\-addressing \-mgettrcost=\fR\fInumber\fR \fB\-mpt\-fixed
\&\fB\-madjust\-unroll \-mindexed\-addressing \-mgettrcost=\fR\fInumber\fR \fB\-mpt\-fixed
\&\-minvalid\-symbols\fR
\&\-minvalid\-symbols\fR
.Sp
.Sp
\&\fI\s-1SPARC\s0 Options\fR
\&\fI\s-1SPARC\s0 Options\fR
\&\fB\-mcpu=\fR\fIcpu-type\fR
\&\fB\-mcpu=\fR\fIcpu-type\fR
\&\fB\-mtune=\fR\fIcpu-type\fR
\&\fB\-mtune=\fR\fIcpu-type\fR
\&\fB\-mcmodel=\fR\fIcode-model\fR
\&\fB\-mcmodel=\fR\fIcode-model\fR
\&\fB\-m32  \-m64  \-mapp\-regs  \-mno\-app\-regs
\&\fB\-m32  \-m64  \-mapp\-regs  \-mno\-app\-regs
\&\-mfaster\-structs  \-mno\-faster\-structs
\&\-mfaster\-structs  \-mno\-faster\-structs
\&\-mfpu  \-mno\-fpu  \-mhard\-float  \-msoft\-float
\&\-mfpu  \-mno\-fpu  \-mhard\-float  \-msoft\-float
\&\-mhard\-quad\-float  \-msoft\-quad\-float
\&\-mhard\-quad\-float  \-msoft\-quad\-float
\&\-mimpure\-text  \-mno\-impure\-text  \-mlittle\-endian
\&\-mimpure\-text  \-mno\-impure\-text  \-mlittle\-endian
\&\-mstack\-bias  \-mno\-stack\-bias
\&\-mstack\-bias  \-mno\-stack\-bias
\&\-munaligned\-doubles  \-mno\-unaligned\-doubles
\&\-munaligned\-doubles  \-mno\-unaligned\-doubles
\&\-mv8plus  \-mno\-v8plus  \-mvis  \-mno\-vis
\&\-mv8plus  \-mno\-v8plus  \-mvis  \-mno\-vis
\&\-threads \-pthreads \-pthread\fR
\&\-threads \-pthreads \-pthread\fR
.Sp
.Sp
\&\fI\s-1SPU\s0 Options\fR
\&\fI\s-1SPU\s0 Options\fR
\&\fB\-mwarn\-reloc \-merror\-reloc
\&\fB\-mwarn\-reloc \-merror\-reloc
\&\-msafe\-dma \-munsafe\-dma
\&\-msafe\-dma \-munsafe\-dma
\&\-mbranch\-hints
\&\-mbranch\-hints
\&\-msmall\-mem \-mlarge\-mem \-mstdmain
\&\-msmall\-mem \-mlarge\-mem \-mstdmain
\&\-mfixed\-range=\fR\fIregister-range\fR
\&\-mfixed\-range=\fR\fIregister-range\fR
\&\fB\-mea32 \-mea64
\&\fB\-mea32 \-mea64
\&\-maddress\-space\-conversion \-mno\-address\-space\-conversion
\&\-maddress\-space\-conversion \-mno\-address\-space\-conversion
\&\-mcache\-size=\fR\fIcache-size\fR
\&\-mcache\-size=\fR\fIcache-size\fR
\&\fB\-matomic\-updates \-mno\-atomic\-updates\fR
\&\fB\-matomic\-updates \-mno\-atomic\-updates\fR
.Sp
.Sp
\&\fISystem V Options\fR
\&\fISystem V Options\fR
\&\fB\-Qy  \-Qn  \-YP,\fR\fIpaths\fR  \fB\-Ym,\fR\fIdir\fR
\&\fB\-Qy  \-Qn  \-YP,\fR\fIpaths\fR  \fB\-Ym,\fR\fIdir\fR
.Sp
.Sp
\&\fIV850 Options\fR
\&\fIV850 Options\fR
\&\fB\-mlong\-calls  \-mno\-long\-calls  \-mep  \-mno\-ep
\&\fB\-mlong\-calls  \-mno\-long\-calls  \-mep  \-mno\-ep
\&\-mprolog\-function  \-mno\-prolog\-function  \-mspace
\&\-mprolog\-function  \-mno\-prolog\-function  \-mspace
\&\-mtda=\fR\fIn\fR  \fB\-msda=\fR\fIn\fR  \fB\-mzda=\fR\fIn\fR
\&\-mtda=\fR\fIn\fR  \fB\-msda=\fR\fIn\fR  \fB\-mzda=\fR\fIn\fR
\&\fB\-mapp\-regs  \-mno\-app\-regs
\&\fB\-mapp\-regs  \-mno\-app\-regs
\&\-mdisable\-callt  \-mno\-disable\-callt
\&\-mdisable\-callt  \-mno\-disable\-callt
\&\-mv850e1
\&\-mv850e1
\&\-mv850e
\&\-mv850e
\&\-mv850  \-mbig\-switch\fR
\&\-mv850  \-mbig\-switch\fR
.Sp
.Sp
\&\fI\s-1VAX\s0 Options\fR
\&\fI\s-1VAX\s0 Options\fR
\&\fB\-mg  \-mgnu  \-munix\fR
\&\fB\-mg  \-mgnu  \-munix\fR
.Sp
.Sp
\&\fIVxWorks Options\fR
\&\fIVxWorks Options\fR
\&\fB\-mrtp  \-non\-static  \-Bstatic  \-Bdynamic
\&\fB\-mrtp  \-non\-static  \-Bstatic  \-Bdynamic
\&\-Xbind\-lazy  \-Xbind\-now\fR
\&\-Xbind\-lazy  \-Xbind\-now\fR
.Sp
.Sp
\&\fIx86\-64 Options\fR
\&\fIx86\-64 Options\fR
See i386 and x86\-64 Options.
See i386 and x86\-64 Options.
.Sp
.Sp
\&\fIi386 and x86\-64 Windows Options\fR
\&\fIi386 and x86\-64 Windows Options\fR
\&\fB\-mconsole \-mcygwin \-mno\-cygwin \-mdll
\&\fB\-mconsole \-mcygwin \-mno\-cygwin \-mdll
\&\-mnop\-fun\-dllimport \-mthread \-municode \-mwin32 \-mwindows
\&\-mnop\-fun\-dllimport \-mthread \-municode \-mwin32 \-mwindows
\&\-fno\-set\-stack\-executable\fR
\&\-fno\-set\-stack\-executable\fR
.Sp
.Sp
\&\fIXstormy16 Options\fR
\&\fIXstormy16 Options\fR
\&\fB\-msim\fR
\&\fB\-msim\fR
.Sp
.Sp
\&\fIXtensa Options\fR
\&\fIXtensa Options\fR
\&\fB\-mconst16 \-mno\-const16
\&\fB\-mconst16 \-mno\-const16
\&\-mfused\-madd  \-mno\-fused\-madd
\&\-mfused\-madd  \-mno\-fused\-madd
\&\-mserialize\-volatile  \-mno\-serialize\-volatile
\&\-mserialize\-volatile  \-mno\-serialize\-volatile
\&\-mtext\-section\-literals  \-mno\-text\-section\-literals
\&\-mtext\-section\-literals  \-mno\-text\-section\-literals
\&\-mtarget\-align  \-mno\-target\-align
\&\-mtarget\-align  \-mno\-target\-align
\&\-mlongcalls  \-mno\-longcalls\fR
\&\-mlongcalls  \-mno\-longcalls\fR
.Sp
.Sp
\&\fIzSeries Options\fR
\&\fIzSeries Options\fR
See S/390 and zSeries Options.
See S/390 and zSeries Options.
.IP "\fICode Generation Options\fR" 4
.IP "\fICode Generation Options\fR" 4
.IX Item "Code Generation Options"
.IX Item "Code Generation Options"
\&\fB\-fcall\-saved\-\fR\fIreg\fR  \fB\-fcall\-used\-\fR\fIreg\fR
\&\fB\-fcall\-saved\-\fR\fIreg\fR  \fB\-fcall\-used\-\fR\fIreg\fR
\&\fB\-ffixed\-\fR\fIreg\fR  \fB\-fexceptions
\&\fB\-ffixed\-\fR\fIreg\fR  \fB\-fexceptions
\&\-fnon\-call\-exceptions  \-funwind\-tables
\&\-fnon\-call\-exceptions  \-funwind\-tables
\&\-fasynchronous\-unwind\-tables
\&\-fasynchronous\-unwind\-tables
\&\-finhibit\-size\-directive  \-finstrument\-functions
\&\-finhibit\-size\-directive  \-finstrument\-functions
\&\-finstrument\-functions\-exclude\-function\-list=\fR\fIsym\fR\fB,\fR\fIsym\fR\fB,...
\&\-finstrument\-functions\-exclude\-function\-list=\fR\fIsym\fR\fB,\fR\fIsym\fR\fB,...
\&\-finstrument\-functions\-exclude\-file\-list=\fR\fIfile\fR\fB,\fR\fIfile\fR\fB,...
\&\-finstrument\-functions\-exclude\-file\-list=\fR\fIfile\fR\fB,\fR\fIfile\fR\fB,...
\&\-fno\-common  \-fno\-ident
\&\-fno\-common  \-fno\-ident
\&\-fpcc\-struct\-return  \-fpic  \-fPIC \-fpie \-fPIE
\&\-fpcc\-struct\-return  \-fpic  \-fPIC \-fpie \-fPIE
\&\-fno\-jump\-tables
\&\-fno\-jump\-tables
\&\-frecord\-gcc\-switches
\&\-frecord\-gcc\-switches
\&\-freg\-struct\-return  \-fshort\-enums
\&\-freg\-struct\-return  \-fshort\-enums
\&\-fshort\-double  \-fshort\-wchar
\&\-fshort\-double  \-fshort\-wchar
\&\-fverbose\-asm  \-fpack\-struct[=\fR\fIn\fR\fB]  \-fstack\-check
\&\-fverbose\-asm  \-fpack\-struct[=\fR\fIn\fR\fB]  \-fstack\-check
\&\-fstack\-limit\-register=\fR\fIreg\fR  \fB\-fstack\-limit\-symbol=\fR\fIsym\fR
\&\-fstack\-limit\-register=\fR\fIreg\fR  \fB\-fstack\-limit\-symbol=\fR\fIsym\fR
\&\fB\-fno\-stack\-limit  \-fargument\-alias  \-fargument\-noalias
\&\fB\-fno\-stack\-limit  \-fargument\-alias  \-fargument\-noalias
\&\-fargument\-noalias\-global  \-fargument\-noalias\-anything
\&\-fargument\-noalias\-global  \-fargument\-noalias\-anything
\&\-fleading\-underscore  \-ftls\-model=\fR\fImodel\fR
\&\-fleading\-underscore  \-ftls\-model=\fR\fImodel\fR
\&\fB\-ftrapv  \-fwrapv  \-fbounds\-check
\&\fB\-ftrapv  \-fwrapv  \-fbounds\-check
\&\-fvisibility\fR
\&\-fvisibility\fR
.Sh "Options Controlling the Kind of Output"
.Sh "Options Controlling the Kind of Output"
.IX Subsection "Options Controlling the Kind of Output"
.IX Subsection "Options Controlling the Kind of Output"
Compilation can involve up to four stages: preprocessing, compilation
Compilation can involve up to four stages: preprocessing, compilation
proper, assembly and linking, always in that order.  \s-1GCC\s0 is capable of
proper, assembly and linking, always in that order.  \s-1GCC\s0 is capable of
preprocessing and compiling several files either into several
preprocessing and compiling several files either into several
assembler input files, or into one assembler input file; then each
assembler input files, or into one assembler input file; then each
assembler input file produces an object file, and linking combines all
assembler input file produces an object file, and linking combines all
the object files (those newly compiled, and those specified as input)
the object files (those newly compiled, and those specified as input)
into an executable file.
into an executable file.
.PP
.PP
For any given input file, the file name suffix determines what kind of
For any given input file, the file name suffix determines what kind of
compilation is done:
compilation is done:
.IP "\fIfile\fR\fB.c\fR" 4
.IP "\fIfile\fR\fB.c\fR" 4
.IX Item "file.c"
.IX Item "file.c"
C source code which must be preprocessed.
C source code which must be preprocessed.
.IP "\fIfile\fR\fB.i\fR" 4
.IP "\fIfile\fR\fB.i\fR" 4
.IX Item "file.i"
.IX Item "file.i"
C source code which should not be preprocessed.
C source code which should not be preprocessed.
.IP "\fIfile\fR\fB.ii\fR" 4
.IP "\fIfile\fR\fB.ii\fR" 4
.IX Item "file.ii"
.IX Item "file.ii"
\&\*(C+ source code which should not be preprocessed.
\&\*(C+ source code which should not be preprocessed.
.IP "\fIfile\fR\fB.m\fR" 4
.IP "\fIfile\fR\fB.m\fR" 4
.IX Item "file.m"
.IX Item "file.m"
Objective-C source code.  Note that you must link with the \fIlibobjc\fR
Objective-C source code.  Note that you must link with the \fIlibobjc\fR
library to make an Objective-C program work.
library to make an Objective-C program work.
.IP "\fIfile\fR\fB.mi\fR" 4
.IP "\fIfile\fR\fB.mi\fR" 4
.IX Item "file.mi"
.IX Item "file.mi"
Objective-C source code which should not be preprocessed.
Objective-C source code which should not be preprocessed.
.IP "\fIfile\fR\fB.mm\fR" 4
.IP "\fIfile\fR\fB.mm\fR" 4
.IX Item "file.mm"
.IX Item "file.mm"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.M\fR" 4
.IP "\fIfile\fR\fB.M\fR" 4
.IX Item "file.M"
.IX Item "file.M"
.PD
.PD
Objective\-\*(C+ source code.  Note that you must link with the \fIlibobjc\fR
Objective\-\*(C+ source code.  Note that you must link with the \fIlibobjc\fR
library to make an Objective\-\*(C+ program work.  Note that \fB.M\fR refers
library to make an Objective\-\*(C+ program work.  Note that \fB.M\fR refers
to a literal capital M.
to a literal capital M.
.IP "\fIfile\fR\fB.mii\fR" 4
.IP "\fIfile\fR\fB.mii\fR" 4
.IX Item "file.mii"
.IX Item "file.mii"
Objective\-\*(C+ source code which should not be preprocessed.
Objective\-\*(C+ source code which should not be preprocessed.
.IP "\fIfile\fR\fB.h\fR" 4
.IP "\fIfile\fR\fB.h\fR" 4
.IX Item "file.h"
.IX Item "file.h"
C, \*(C+, Objective-C or Objective\-\*(C+ header file to be turned into a
C, \*(C+, Objective-C or Objective\-\*(C+ header file to be turned into a
precompiled header.
precompiled header.
.IP "\fIfile\fR\fB.cc\fR" 4
.IP "\fIfile\fR\fB.cc\fR" 4
.IX Item "file.cc"
.IX Item "file.cc"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.cp\fR" 4
.IP "\fIfile\fR\fB.cp\fR" 4
.IX Item "file.cp"
.IX Item "file.cp"
.IP "\fIfile\fR\fB.cxx\fR" 4
.IP "\fIfile\fR\fB.cxx\fR" 4
.IX Item "file.cxx"
.IX Item "file.cxx"
.IP "\fIfile\fR\fB.cpp\fR" 4
.IP "\fIfile\fR\fB.cpp\fR" 4
.IX Item "file.cpp"
.IX Item "file.cpp"
.IP "\fIfile\fR\fB.CPP\fR" 4
.IP "\fIfile\fR\fB.CPP\fR" 4
.IX Item "file.CPP"
.IX Item "file.CPP"
.IP "\fIfile\fR\fB.c++\fR" 4
.IP "\fIfile\fR\fB.c++\fR" 4
.IX Item "file.c++"
.IX Item "file.c++"
.IP "\fIfile\fR\fB.C\fR" 4
.IP "\fIfile\fR\fB.C\fR" 4
.IX Item "file.C"
.IX Item "file.C"
.PD
.PD
\&\*(C+ source code which must be preprocessed.  Note that in \fB.cxx\fR,
\&\*(C+ source code which must be preprocessed.  Note that in \fB.cxx\fR,
the last two letters must both be literally \fBx\fR.  Likewise,
the last two letters must both be literally \fBx\fR.  Likewise,
\&\fB.C\fR refers to a literal capital C.
\&\fB.C\fR refers to a literal capital C.
.IP "\fIfile\fR\fB.mm\fR" 4
.IP "\fIfile\fR\fB.mm\fR" 4
.IX Item "file.mm"
.IX Item "file.mm"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.M\fR" 4
.IP "\fIfile\fR\fB.M\fR" 4
.IX Item "file.M"
.IX Item "file.M"
.PD
.PD
Objective\-\*(C+ source code which must be preprocessed.
Objective\-\*(C+ source code which must be preprocessed.
.IP "\fIfile\fR\fB.mii\fR" 4
.IP "\fIfile\fR\fB.mii\fR" 4
.IX Item "file.mii"
.IX Item "file.mii"
Objective\-\*(C+ source code which should not be preprocessed.
Objective\-\*(C+ source code which should not be preprocessed.
.IP "\fIfile\fR\fB.hh\fR" 4
.IP "\fIfile\fR\fB.hh\fR" 4
.IX Item "file.hh"
.IX Item "file.hh"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.H\fR" 4
.IP "\fIfile\fR\fB.H\fR" 4
.IX Item "file.H"
.IX Item "file.H"
.IP "\fIfile\fR\fB.hp\fR" 4
.IP "\fIfile\fR\fB.hp\fR" 4
.IX Item "file.hp"
.IX Item "file.hp"
.IP "\fIfile\fR\fB.hxx\fR" 4
.IP "\fIfile\fR\fB.hxx\fR" 4
.IX Item "file.hxx"
.IX Item "file.hxx"
.IP "\fIfile\fR\fB.hpp\fR" 4
.IP "\fIfile\fR\fB.hpp\fR" 4
.IX Item "file.hpp"
.IX Item "file.hpp"
.IP "\fIfile\fR\fB.HPP\fR" 4
.IP "\fIfile\fR\fB.HPP\fR" 4
.IX Item "file.HPP"
.IX Item "file.HPP"
.IP "\fIfile\fR\fB.h++\fR" 4
.IP "\fIfile\fR\fB.h++\fR" 4
.IX Item "file.h++"
.IX Item "file.h++"
.IP "\fIfile\fR\fB.tcc\fR" 4
.IP "\fIfile\fR\fB.tcc\fR" 4
.IX Item "file.tcc"
.IX Item "file.tcc"
.PD
.PD
\&\*(C+ header file to be turned into a precompiled header.
\&\*(C+ header file to be turned into a precompiled header.
.IP "\fIfile\fR\fB.f\fR" 4
.IP "\fIfile\fR\fB.f\fR" 4
.IX Item "file.f"
.IX Item "file.f"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.for\fR" 4
.IP "\fIfile\fR\fB.for\fR" 4
.IX Item "file.for"
.IX Item "file.for"
.IP "\fIfile\fR\fB.ftn\fR" 4
.IP "\fIfile\fR\fB.ftn\fR" 4
.IX Item "file.ftn"
.IX Item "file.ftn"
.PD
.PD
Fixed form Fortran source code which should not be preprocessed.
Fixed form Fortran source code which should not be preprocessed.
.IP "\fIfile\fR\fB.F\fR" 4
.IP "\fIfile\fR\fB.F\fR" 4
.IX Item "file.F"
.IX Item "file.F"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.FOR\fR" 4
.IP "\fIfile\fR\fB.FOR\fR" 4
.IX Item "file.FOR"
.IX Item "file.FOR"
.IP "\fIfile\fR\fB.fpp\fR" 4
.IP "\fIfile\fR\fB.fpp\fR" 4
.IX Item "file.fpp"
.IX Item "file.fpp"
.IP "\fIfile\fR\fB.FPP\fR" 4
.IP "\fIfile\fR\fB.FPP\fR" 4
.IX Item "file.FPP"
.IX Item "file.FPP"
.IP "\fIfile\fR\fB.FTN\fR" 4
.IP "\fIfile\fR\fB.FTN\fR" 4
.IX Item "file.FTN"
.IX Item "file.FTN"
.PD
.PD
Fixed form Fortran source code which must be preprocessed (with the traditional
Fixed form Fortran source code which must be preprocessed (with the traditional
preprocessor).
preprocessor).
.IP "\fIfile\fR\fB.f90\fR" 4
.IP "\fIfile\fR\fB.f90\fR" 4
.IX Item "file.f90"
.IX Item "file.f90"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.f95\fR" 4
.IP "\fIfile\fR\fB.f95\fR" 4
.IX Item "file.f95"
.IX Item "file.f95"
.IP "\fIfile\fR\fB.f03\fR" 4
.IP "\fIfile\fR\fB.f03\fR" 4
.IX Item "file.f03"
.IX Item "file.f03"
.IP "\fIfile\fR\fB.f08\fR" 4
.IP "\fIfile\fR\fB.f08\fR" 4
.IX Item "file.f08"
.IX Item "file.f08"
.PD
.PD
Free form Fortran source code which should not be preprocessed.
Free form Fortran source code which should not be preprocessed.
.IP "\fIfile\fR\fB.F90\fR" 4
.IP "\fIfile\fR\fB.F90\fR" 4
.IX Item "file.F90"
.IX Item "file.F90"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.F95\fR" 4
.IP "\fIfile\fR\fB.F95\fR" 4
.IX Item "file.F95"
.IX Item "file.F95"
.IP "\fIfile\fR\fB.F03\fR" 4
.IP "\fIfile\fR\fB.F03\fR" 4
.IX Item "file.F03"
.IX Item "file.F03"
.IP "\fIfile\fR\fB.F08\fR" 4
.IP "\fIfile\fR\fB.F08\fR" 4
.IX Item "file.F08"
.IX Item "file.F08"
.PD
.PD
Free form Fortran source code which must be preprocessed (with the
Free form Fortran source code which must be preprocessed (with the
traditional preprocessor).
traditional preprocessor).
.IP "\fIfile\fR\fB.ads\fR" 4
.IP "\fIfile\fR\fB.ads\fR" 4
.IX Item "file.ads"
.IX Item "file.ads"
Ada source code file which contains a library unit declaration (a
Ada source code file which contains a library unit declaration (a
declaration of a package, subprogram, or generic, or a generic
declaration of a package, subprogram, or generic, or a generic
instantiation), or a library unit renaming declaration (a package,
instantiation), or a library unit renaming declaration (a package,
generic, or subprogram renaming declaration).  Such files are also
generic, or subprogram renaming declaration).  Such files are also
called \fIspecs\fR.
called \fIspecs\fR.
.IP "\fIfile\fR\fB.adb\fR" 4
.IP "\fIfile\fR\fB.adb\fR" 4
.IX Item "file.adb"
.IX Item "file.adb"
Ada source code file containing a library unit body (a subprogram or
Ada source code file containing a library unit body (a subprogram or
package body).  Such files are also called \fIbodies\fR.
package body).  Such files are also called \fIbodies\fR.
.IP "\fIfile\fR\fB.s\fR" 4
.IP "\fIfile\fR\fB.s\fR" 4
.IX Item "file.s"
.IX Item "file.s"
Assembler code.
Assembler code.
.IP "\fIfile\fR\fB.S\fR" 4
.IP "\fIfile\fR\fB.S\fR" 4
.IX Item "file.S"
.IX Item "file.S"
.PD 0
.PD 0
.IP "\fIfile\fR\fB.sx\fR" 4
.IP "\fIfile\fR\fB.sx\fR" 4
.IX Item "file.sx"
.IX Item "file.sx"
.PD
.PD
Assembler code which must be preprocessed.
Assembler code which must be preprocessed.
.IP "\fIother\fR" 4
.IP "\fIother\fR" 4
.IX Item "other"
.IX Item "other"
An object file to be fed straight into linking.
An object file to be fed straight into linking.
Any file name with no recognized suffix is treated this way.
Any file name with no recognized suffix is treated this way.
.PP
.PP
You can specify the input language explicitly with the \fB\-x\fR option:
You can specify the input language explicitly with the \fB\-x\fR option:
.IP "\fB\-x\fR \fIlanguage\fR" 4
.IP "\fB\-x\fR \fIlanguage\fR" 4
.IX Item "-x language"
.IX Item "-x language"
Specify explicitly the \fIlanguage\fR for the following input files
Specify explicitly the \fIlanguage\fR for the following input files
(rather than letting the compiler choose a default based on the file
(rather than letting the compiler choose a default based on the file
name suffix).  This option applies to all following input files until
name suffix).  This option applies to all following input files until
the next \fB\-x\fR option.  Possible values for \fIlanguage\fR are:
the next \fB\-x\fR option.  Possible values for \fIlanguage\fR are:
.Sp
.Sp
.Vb 8
.Vb 8
\&        c  c\-header  c\-cpp\-output
\&        c  c\-header  c\-cpp\-output
\&        c++  c++\-header  c++\-cpp\-output
\&        c++  c++\-header  c++\-cpp\-output
\&        objective\-c  objective\-c\-header  objective\-c\-cpp\-output
\&        objective\-c  objective\-c\-header  objective\-c\-cpp\-output
\&        objective\-c++ objective\-c++\-header objective\-c++\-cpp\-output
\&        objective\-c++ objective\-c++\-header objective\-c++\-cpp\-output
\&        assembler  assembler\-with\-cpp
\&        assembler  assembler\-with\-cpp
\&        ada
\&        ada
\&        f77  f77\-cpp\-input f95  f95\-cpp\-input
\&        f77  f77\-cpp\-input f95  f95\-cpp\-input
\&        java
\&        java
.Ve
.Ve
.IP "\fB\-x none\fR" 4
.IP "\fB\-x none\fR" 4
.IX Item "-x none"
.IX Item "-x none"
Turn off any specification of a language, so that subsequent files are
Turn off any specification of a language, so that subsequent files are
handled according to their file name suffixes (as they are if \fB\-x\fR
handled according to their file name suffixes (as they are if \fB\-x\fR
has not been used at all).
has not been used at all).
.IP "\fB\-pass\-exit\-codes\fR" 4
.IP "\fB\-pass\-exit\-codes\fR" 4
.IX Item "-pass-exit-codes"
.IX Item "-pass-exit-codes"
Normally the \fBgcc\fR program will exit with the code of 1 if any
Normally the \fBgcc\fR program will exit with the code of 1 if any
phase of the compiler returns a non-success return code.  If you specify
phase of the compiler returns a non-success return code.  If you specify
\&\fB\-pass\-exit\-codes\fR, the \fBgcc\fR program will instead return with
\&\fB\-pass\-exit\-codes\fR, the \fBgcc\fR program will instead return with
numerically highest error produced by any phase that returned an error
numerically highest error produced by any phase that returned an error
indication.  The C, \*(C+, and Fortran frontends return 4, if an internal
indication.  The C, \*(C+, and Fortran frontends return 4, if an internal
compiler error is encountered.
compiler error is encountered.
.PP
.PP
If you only want some of the stages of compilation, you can use
If you only want some of the stages of compilation, you can use
\&\fB\-x\fR (or filename suffixes) to tell \fBgcc\fR where to start, and
\&\fB\-x\fR (or filename suffixes) to tell \fBgcc\fR where to start, and
one of the options \fB\-c\fR, \fB\-S\fR, or \fB\-E\fR to say where
one of the options \fB\-c\fR, \fB\-S\fR, or \fB\-E\fR to say where
\&\fBgcc\fR is to stop.  Note that some combinations (for example,
\&\fBgcc\fR is to stop.  Note that some combinations (for example,
\&\fB\-x cpp-output \-E\fR) instruct \fBgcc\fR to do nothing at all.
\&\fB\-x cpp-output \-E\fR) instruct \fBgcc\fR to do nothing at all.
.IP "\fB\-c\fR" 4
.IP "\fB\-c\fR" 4
.IX Item "-c"
.IX Item "-c"
Compile or assemble the source files, but do not link.  The linking
Compile or assemble the source files, but do not link.  The linking
stage simply is not done.  The ultimate output is in the form of an
stage simply is not done.  The ultimate output is in the form of an
object file for each source file.
object file for each source file.
.Sp
.Sp
By default, the object file name for a source file is made by replacing
By default, the object file name for a source file is made by replacing
the suffix \fB.c\fR, \fB.i\fR, \fB.s\fR, etc., with \fB.o\fR.
the suffix \fB.c\fR, \fB.i\fR, \fB.s\fR, etc., with \fB.o\fR.
.Sp
.Sp
Unrecognized input files, not requiring compilation or assembly, are
Unrecognized input files, not requiring compilation or assembly, are
ignored.
ignored.
.IP "\fB\-S\fR" 4
.IP "\fB\-S\fR" 4
.IX Item "-S"
.IX Item "-S"
Stop after the stage of compilation proper; do not assemble.  The output
Stop after the stage of compilation proper; do not assemble.  The output
is in the form of an assembler code file for each non-assembler input
is in the form of an assembler code file for each non-assembler input
file specified.
file specified.
.Sp
.Sp
By default, the assembler file name for a source file is made by
By default, the assembler file name for a source file is made by
replacing the suffix \fB.c\fR, \fB.i\fR, etc., with \fB.s\fR.
replacing the suffix \fB.c\fR, \fB.i\fR, etc., with \fB.s\fR.
.Sp
.Sp
Input files that don't require compilation are ignored.
Input files that don't require compilation are ignored.
.IP "\fB\-E\fR" 4
.IP "\fB\-E\fR" 4
.IX Item "-E"
.IX Item "-E"
Stop after the preprocessing stage; do not run the compiler proper.  The
Stop after the preprocessing stage; do not run the compiler proper.  The
output is in the form of preprocessed source code, which is sent to the
output is in the form of preprocessed source code, which is sent to the
standard output.
standard output.
.Sp
.Sp
Input files which don't require preprocessing are ignored.
Input files which don't require preprocessing are ignored.
.IP "\fB\-o\fR \fIfile\fR" 4
.IP "\fB\-o\fR \fIfile\fR" 4
.IX Item "-o file"
.IX Item "-o file"
Place output in file \fIfile\fR.  This applies regardless to whatever
Place output in file \fIfile\fR.  This applies regardless to whatever
sort of output is being produced, whether it be an executable file,
sort of output is being produced, whether it be an executable file,
an object file, an assembler file or preprocessed C code.
an object file, an assembler file or preprocessed C code.
.Sp
.Sp
If \fB\-o\fR is not specified, the default is to put an executable
If \fB\-o\fR is not specified, the default is to put an executable
file in \fIa.out\fR, the object file for
file in \fIa.out\fR, the object file for
\&\fI\fIsource\fI.\fIsuffix\fI\fR in \fI\fIsource\fI.o\fR, its
\&\fI\fIsource\fI.\fIsuffix\fI\fR in \fI\fIsource\fI.o\fR, its
assembler file in \fI\fIsource\fI.s\fR, a precompiled header file in
assembler file in \fI\fIsource\fI.s\fR, a precompiled header file in
\&\fI\fIsource\fI.\fIsuffix\fI.gch\fR, and all preprocessed C source on
\&\fI\fIsource\fI.\fIsuffix\fI.gch\fR, and all preprocessed C source on
standard output.
standard output.
.IP "\fB\-v\fR" 4
.IP "\fB\-v\fR" 4
.IX Item "-v"
.IX Item "-v"
Print (on standard error output) the commands executed to run the stages
Print (on standard error output) the commands executed to run the stages
of compilation.  Also print the version number of the compiler driver
of compilation.  Also print the version number of the compiler driver
program and of the preprocessor and the compiler proper.
program and of the preprocessor and the compiler proper.
.IP "\fB\-###\fR" 4
.IP "\fB\-###\fR" 4
.IX Item "-###"
.IX Item "-###"
Like \fB\-v\fR except the commands are not executed and all command
Like \fB\-v\fR except the commands are not executed and all command
arguments are quoted.  This is useful for shell scripts to capture the
arguments are quoted.  This is useful for shell scripts to capture the
driver-generated command lines.
driver-generated command lines.
.IP "\fB\-pipe\fR" 4
.IP "\fB\-pipe\fR" 4
.IX Item "-pipe"
.IX Item "-pipe"
Use pipes rather than temporary files for communication between the
Use pipes rather than temporary files for communication between the
various stages of compilation.  This fails to work on some systems where
various stages of compilation.  This fails to work on some systems where
the assembler is unable to read from a pipe; but the \s-1GNU\s0 assembler has
the assembler is unable to read from a pipe; but the \s-1GNU\s0 assembler has
no trouble.
no trouble.
.IP "\fB\-combine\fR" 4
.IP "\fB\-combine\fR" 4
.IX Item "-combine"
.IX Item "-combine"
If you are compiling multiple source files, this option tells the driver
If you are compiling multiple source files, this option tells the driver
to pass all the source files to the compiler at once (for those
to pass all the source files to the compiler at once (for those
languages for which the compiler can handle this).  This will allow
languages for which the compiler can handle this).  This will allow
intermodule analysis (\s-1IMA\s0) to be performed by the compiler.  Currently the only
intermodule analysis (\s-1IMA\s0) to be performed by the compiler.  Currently the only
language for which this is supported is C.  If you pass source files for
language for which this is supported is C.  If you pass source files for
multiple languages to the driver, using this option, the driver will invoke
multiple languages to the driver, using this option, the driver will invoke
the compiler(s) that support \s-1IMA\s0 once each, passing each compiler all the
the compiler(s) that support \s-1IMA\s0 once each, passing each compiler all the
source files appropriate for it.  For those languages that do not support
source files appropriate for it.  For those languages that do not support
\&\s-1IMA\s0 this option will be ignored, and the compiler will be invoked once for
\&\s-1IMA\s0 this option will be ignored, and the compiler will be invoked once for
each source file in that language.  If you use this option in conjunction
each source file in that language.  If you use this option in conjunction
with \fB\-save\-temps\fR, the compiler will generate multiple
with \fB\-save\-temps\fR, the compiler will generate multiple
pre-processed files
pre-processed files
(one for each source file), but only one (combined) \fI.o\fR or
(one for each source file), but only one (combined) \fI.o\fR or
\&\fI.s\fR file.
\&\fI.s\fR file.
.IP "\fB\-\-help\fR" 4
.IP "\fB\-\-help\fR" 4
.IX Item "--help"
.IX Item "--help"
Print (on the standard output) a description of the command line options
Print (on the standard output) a description of the command line options
understood by \fBgcc\fR.  If the \fB\-v\fR option is also specified
understood by \fBgcc\fR.  If the \fB\-v\fR option is also specified
then \fB\-\-help\fR will also be passed on to the various processes
then \fB\-\-help\fR will also be passed on to the various processes
invoked by \fBgcc\fR, so that they can display the command line options
invoked by \fBgcc\fR, so that they can display the command line options
they accept.  If the \fB\-Wextra\fR option has also been specified
they accept.  If the \fB\-Wextra\fR option has also been specified
(prior to the \fB\-\-help\fR option), then command line options which
(prior to the \fB\-\-help\fR option), then command line options which
have no documentation associated with them will also be displayed.
have no documentation associated with them will also be displayed.
.IP "\fB\-\-target\-help\fR" 4
.IP "\fB\-\-target\-help\fR" 4
.IX Item "--target-help"
.IX Item "--target-help"
Print (on the standard output) a description of target-specific command
Print (on the standard output) a description of target-specific command
line options for each tool.  For some targets extra target-specific
line options for each tool.  For some targets extra target-specific
information may also be printed.
information may also be printed.
.IP "\fB\-\-help={\fR\fIclass\fR|[\fB^\fR]\fIqualifier\fR\fB}\fR[\fB,...\fR]" 4
.IP "\fB\-\-help={\fR\fIclass\fR|[\fB^\fR]\fIqualifier\fR\fB}\fR[\fB,...\fR]" 4
.IX Item "--help={class|[^]qualifier}[,...]"
.IX Item "--help={class|[^]qualifier}[,...]"
Print (on the standard output) a description of the command line
Print (on the standard output) a description of the command line
options understood by the compiler that fit into all specified classes
options understood by the compiler that fit into all specified classes
and qualifiers.  These are the supported classes:
and qualifiers.  These are the supported classes:
.RS 4
.RS 4
.IP "\fBoptimizers\fR" 4
.IP "\fBoptimizers\fR" 4
.IX Item "optimizers"
.IX Item "optimizers"
This will display all of the optimization options supported by the
This will display all of the optimization options supported by the
compiler.
compiler.
.IP "\fBwarnings\fR" 4
.IP "\fBwarnings\fR" 4
.IX Item "warnings"
.IX Item "warnings"
This will display all of the options controlling warning messages
This will display all of the options controlling warning messages
produced by the compiler.
produced by the compiler.
.IP "\fBtarget\fR" 4
.IP "\fBtarget\fR" 4
.IX Item "target"
.IX Item "target"
This will display target-specific options.  Unlike the
This will display target-specific options.  Unlike the
\&\fB\-\-target\-help\fR option however, target-specific options of the
\&\fB\-\-target\-help\fR option however, target-specific options of the
linker and assembler will not be displayed.  This is because those
linker and assembler will not be displayed.  This is because those
tools do not currently support the extended \fB\-\-help=\fR syntax.
tools do not currently support the extended \fB\-\-help=\fR syntax.
.IP "\fBparams\fR" 4
.IP "\fBparams\fR" 4
.IX Item "params"
.IX Item "params"
This will display the values recognized by the \fB\-\-param\fR
This will display the values recognized by the \fB\-\-param\fR
option.
option.
.IP "\fIlanguage\fR" 4
.IP "\fIlanguage\fR" 4
.IX Item "language"
.IX Item "language"
This will display the options supported for \fIlanguage\fR, where
This will display the options supported for \fIlanguage\fR, where
\&\fIlanguage\fR is the name of one of the languages supported in this
\&\fIlanguage\fR is the name of one of the languages supported in this
version of \s-1GCC\s0.
version of \s-1GCC\s0.
.IP "\fBcommon\fR" 4
.IP "\fBcommon\fR" 4
.IX Item "common"
.IX Item "common"
This will display the options that are common to all languages.
This will display the options that are common to all languages.
.RE
.RE
.RS 4
.RS 4
.Sp
.Sp
These are the supported qualifiers:
These are the supported qualifiers:
.IP "\fBundocumented\fR" 4
.IP "\fBundocumented\fR" 4
.IX Item "undocumented"
.IX Item "undocumented"
Display only those options which are undocumented.
Display only those options which are undocumented.
.IP "\fBjoined\fR" 4
.IP "\fBjoined\fR" 4
.IX Item "joined"
.IX Item "joined"
Display options which take an argument that appears after an equal
Display options which take an argument that appears after an equal
sign in the same continuous piece of text, such as:
sign in the same continuous piece of text, such as:
\&\fB\-\-help=target\fR.
\&\fB\-\-help=target\fR.
.IP "\fBseparate\fR" 4
.IP "\fBseparate\fR" 4
.IX Item "separate"
.IX Item "separate"
Display options which take an argument that appears as a separate word
Display options which take an argument that appears as a separate word
following the original option, such as: \fB\-o output-file\fR.
following the original option, such as: \fB\-o output-file\fR.
.RE
.RE
.RS 4
.RS 4
.Sp
.Sp
Thus for example to display all the undocumented target-specific
Thus for example to display all the undocumented target-specific
switches supported by the compiler the following can be used:
switches supported by the compiler the following can be used:
.Sp
.Sp
.Vb 1
.Vb 1
\&        \-\-help=target,undocumented
\&        \-\-help=target,undocumented
.Ve
.Ve
.Sp
.Sp
The sense of a qualifier can be inverted by prefixing it with the
The sense of a qualifier can be inverted by prefixing it with the
\&\fB^\fR character, so for example to display all binary warning
\&\fB^\fR character, so for example to display all binary warning
options (i.e., ones that are either on or off and that do not take an
options (i.e., ones that are either on or off and that do not take an
argument), which have a description the following can be used:
argument), which have a description the following can be used:
.Sp
.Sp
.Vb 1
.Vb 1
\&        \-\-help=warnings,^joined,^undocumented
\&        \-\-help=warnings,^joined,^undocumented
.Ve
.Ve
.Sp
.Sp
The argument to \fB\-\-help=\fR should not consist solely of inverted
The argument to \fB\-\-help=\fR should not consist solely of inverted
qualifiers.
qualifiers.
.Sp
.Sp
Combining several classes is possible, although this usually
Combining several classes is possible, although this usually
restricts the output by so much that there is nothing to display.  One
restricts the output by so much that there is nothing to display.  One
case where it does work however is when one of the classes is
case where it does work however is when one of the classes is
\&\fItarget\fR.  So for example to display all the target-specific
\&\fItarget\fR.  So for example to display all the target-specific
optimization options the following can be used:
optimization options the following can be used:
.Sp
.Sp
.Vb 1
.Vb 1
\&        \-\-help=target,optimizers
\&        \-\-help=target,optimizers
.Ve
.Ve
.Sp
.Sp
The \fB\-\-help=\fR option can be repeated on the command line.  Each
The \fB\-\-help=\fR option can be repeated on the command line.  Each
successive use will display its requested class of options, skipping
successive use will display its requested class of options, skipping
those that have already been displayed.
those that have already been displayed.
.Sp
.Sp
If the \fB\-Q\fR option appears on the command line before the
If the \fB\-Q\fR option appears on the command line before the
\&\fB\-\-help=\fR option, then the descriptive text displayed by
\&\fB\-\-help=\fR option, then the descriptive text displayed by
\&\fB\-\-help=\fR is changed.  Instead of describing the displayed
\&\fB\-\-help=\fR is changed.  Instead of describing the displayed
options, an indication is given as to whether the option is enabled,
options, an indication is given as to whether the option is enabled,
disabled or set to a specific value (assuming that the compiler
disabled or set to a specific value (assuming that the compiler
knows this at the point where the \fB\-\-help=\fR option is used).
knows this at the point where the \fB\-\-help=\fR option is used).
.Sp
.Sp
Here is a truncated example from the \s-1ARM\s0 port of \fBgcc\fR:
Here is a truncated example from the \s-1ARM\s0 port of \fBgcc\fR:
.Sp
.Sp
.Vb 5
.Vb 5
\&          % gcc \-Q \-mabi=2 \-\-help=target \-c
\&          % gcc \-Q \-mabi=2 \-\-help=target \-c
\&          The following options are target specific:
\&          The following options are target specific:
\&          \-mabi=                                2
\&          \-mabi=                                2
\&          \-mabort\-on\-noreturn                   [disabled]
\&          \-mabort\-on\-noreturn                   [disabled]
\&          \-mapcs                                [disabled]
\&          \-mapcs                                [disabled]
.Ve
.Ve
.Sp
.Sp
The output is sensitive to the effects of previous command line
The output is sensitive to the effects of previous command line
options, so for example it is possible to find out which optimizations
options, so for example it is possible to find out which optimizations
are enabled at \fB\-O2\fR by using:
are enabled at \fB\-O2\fR by using:
.Sp
.Sp
.Vb 1
.Vb 1
\&        \-Q \-O2 \-\-help=optimizers
\&        \-Q \-O2 \-\-help=optimizers
.Ve
.Ve
.Sp
.Sp
Alternatively you can discover which binary optimizations are enabled
Alternatively you can discover which binary optimizations are enabled
by \fB\-O3\fR by using:
by \fB\-O3\fR by using:
.Sp
.Sp
.Vb 3
.Vb 3
\&        gcc \-c \-Q \-O3 \-\-help=optimizers > /tmp/O3\-opts
\&        gcc \-c \-Q \-O3 \-\-help=optimizers > /tmp/O3\-opts
\&        gcc \-c \-Q \-O2 \-\-help=optimizers > /tmp/O2\-opts
\&        gcc \-c \-Q \-O2 \-\-help=optimizers > /tmp/O2\-opts
\&        diff /tmp/O2\-opts /tmp/O3\-opts | grep enabled
\&        diff /tmp/O2\-opts /tmp/O3\-opts | grep enabled
.Ve
.Ve
.RE
.RE
.IP "\fB\-no\-canonical\-prefixes\fR" 4
.IP "\fB\-no\-canonical\-prefixes\fR" 4
.IX Item "-no-canonical-prefixes"
.IX Item "-no-canonical-prefixes"
Do not expand any symbolic links, resolve references to \fB/../\fR
Do not expand any symbolic links, resolve references to \fB/../\fR
or \fB/./\fR, or make the path absolute when generating a relative
or \fB/./\fR, or make the path absolute when generating a relative
prefix.
prefix.
.IP "\fB\-\-version\fR" 4
.IP "\fB\-\-version\fR" 4
.IX Item "--version"
.IX Item "--version"
Display the version number and copyrights of the invoked \s-1GCC\s0.
Display the version number and copyrights of the invoked \s-1GCC\s0.
.IP "\fB\-wrapper\fR" 4
.IP "\fB\-wrapper\fR" 4
.IX Item "-wrapper"
.IX Item "-wrapper"
Invoke all subcommands under a wrapper program. It takes a single
Invoke all subcommands under a wrapper program. It takes a single
comma separated list as an argument, which will be used to invoke
comma separated list as an argument, which will be used to invoke
the wrapper:
the wrapper:
.Sp
.Sp
.Vb 1
.Vb 1
\&        gcc \-c t.c \-wrapper gdb,\-\-args
\&        gcc \-c t.c \-wrapper gdb,\-\-args
.Ve
.Ve
.Sp
.Sp
This will invoke all subprograms of gcc under \*(L"gdb \-\-args\*(R",
This will invoke all subprograms of gcc under \*(L"gdb \-\-args\*(R",
thus cc1 invocation will be \*(L"gdb \-\-args cc1 ...\*(R".
thus cc1 invocation will be \*(L"gdb \-\-args cc1 ...\*(R".
.IP "\fB\-fplugin=\fR\fIname\fR\fB.so\fR" 4
.IP "\fB\-fplugin=\fR\fIname\fR\fB.so\fR" 4
.IX Item "-fplugin=name.so"
.IX Item "-fplugin=name.so"
Load the plugin code in file \fIname\fR.so, assumed to be a
Load the plugin code in file \fIname\fR.so, assumed to be a
shared object to be dlopen'd by the compiler.  The base name of
shared object to be dlopen'd by the compiler.  The base name of
the shared object file is used to identify the plugin for the
the shared object file is used to identify the plugin for the
purposes of argument parsing (See
purposes of argument parsing (See
\&\fB\-fplugin\-arg\-\fR\fIname\fR\fB\-\fR\fIkey\fR\fB=\fR\fIvalue\fR below).
\&\fB\-fplugin\-arg\-\fR\fIname\fR\fB\-\fR\fIkey\fR\fB=\fR\fIvalue\fR below).
Each plugin should define the callback functions specified in the
Each plugin should define the callback functions specified in the
Plugins \s-1API\s0.
Plugins \s-1API\s0.
.IP "\fB\-fplugin\-arg\-\fR\fIname\fR\fB\-\fR\fIkey\fR\fB=\fR\fIvalue\fR" 4
.IP "\fB\-fplugin\-arg\-\fR\fIname\fR\fB\-\fR\fIkey\fR\fB=\fR\fIvalue\fR" 4
.IX Item "-fplugin-arg-name-key=value"
.IX Item "-fplugin-arg-name-key=value"
Define an argument called \fIkey\fR with a value of \fIvalue\fR
Define an argument called \fIkey\fR with a value of \fIvalue\fR
for the plugin called \fIname\fR.
for the plugin called \fIname\fR.
.IP "\fB@\fR\fIfile\fR" 4
.IP "\fB@\fR\fIfile\fR" 4
.IX Item "@file"
.IX Item "@file"
Read command-line options from \fIfile\fR.  The options read are
Read command-line options from \fIfile\fR.  The options read are
inserted in place of the original @\fIfile\fR option.  If \fIfile\fR
inserted in place of the original @\fIfile\fR option.  If \fIfile\fR
does not exist, or cannot be read, then the option will be treated
does not exist, or cannot be read, then the option will be treated
literally, and not removed.
literally, and not removed.
.Sp
.Sp
Options in \fIfile\fR are separated by whitespace.  A whitespace
Options in \fIfile\fR are separated by whitespace.  A whitespace
character may be included in an option by surrounding the entire
character may be included in an option by surrounding the entire
option in either single or double quotes.  Any character (including a
option in either single or double quotes.  Any character (including a
backslash) may be included by prefixing the character to be included
backslash) may be included by prefixing the character to be included
with a backslash.  The \fIfile\fR may itself contain additional
with a backslash.  The \fIfile\fR may itself contain additional
@\fIfile\fR options; any such options will be processed recursively.
@\fIfile\fR options; any such options will be processed recursively.
.Sh "Compiling \*(C+ Programs"
.Sh "Compiling \*(C+ Programs"
.IX Subsection "Compiling  Programs"
.IX Subsection "Compiling  Programs"
\&\*(C+ source files conventionally use one of the suffixes \fB.C\fR,
\&\*(C+ source files conventionally use one of the suffixes \fB.C\fR,
\&\fB.cc\fR, \fB.cpp\fR, \fB.CPP\fR, \fB.c++\fR, \fB.cp\fR, or
\&\fB.cc\fR, \fB.cpp\fR, \fB.CPP\fR, \fB.c++\fR, \fB.cp\fR, or
\&\fB.cxx\fR; \*(C+ header files often use \fB.hh\fR, \fB.hpp\fR,
\&\fB.cxx\fR; \*(C+ header files often use \fB.hh\fR, \fB.hpp\fR,
\&\fB.H\fR, or (for shared template code) \fB.tcc\fR; and
\&\fB.H\fR, or (for shared template code) \fB.tcc\fR; and
preprocessed \*(C+ files use the suffix \fB.ii\fR.  \s-1GCC\s0 recognizes
preprocessed \*(C+ files use the suffix \fB.ii\fR.  \s-1GCC\s0 recognizes
files with these names and compiles them as \*(C+ programs even if you
files with these names and compiles them as \*(C+ programs even if you
call the compiler the same way as for compiling C programs (usually
call the compiler the same way as for compiling C programs (usually
with the name \fBgcc\fR).
with the name \fBgcc\fR).
.PP
.PP
However, the use of \fBgcc\fR does not add the \*(C+ library.
However, the use of \fBgcc\fR does not add the \*(C+ library.
\&\fBg++\fR is a program that calls \s-1GCC\s0 and treats \fB.c\fR,
\&\fBg++\fR is a program that calls \s-1GCC\s0 and treats \fB.c\fR,
\&\fB.h\fR and \fB.i\fR files as \*(C+ source files instead of C source
\&\fB.h\fR and \fB.i\fR files as \*(C+ source files instead of C source
files unless \fB\-x\fR is used, and automatically specifies linking
files unless \fB\-x\fR is used, and automatically specifies linking
against the \*(C+ library.  This program is also useful when
against the \*(C+ library.  This program is also useful when
precompiling a C header file with a \fB.h\fR extension for use in \*(C+
precompiling a C header file with a \fB.h\fR extension for use in \*(C+
compilations.  On many systems, \fBg++\fR is also installed with
compilations.  On many systems, \fBg++\fR is also installed with
the name \fBc++\fR.
the name \fBc++\fR.
.PP
.PP
When you compile \*(C+ programs, you may specify many of the same
When you compile \*(C+ programs, you may specify many of the same
command-line options that you use for compiling programs in any
command-line options that you use for compiling programs in any
language; or command-line options meaningful for C and related
language; or command-line options meaningful for C and related
languages; or options that are meaningful only for \*(C+ programs.
languages; or options that are meaningful only for \*(C+ programs.
.Sh "Options Controlling C Dialect"
.Sh "Options Controlling C Dialect"
.IX Subsection "Options Controlling C Dialect"
.IX Subsection "Options Controlling C Dialect"
The following options control the dialect of C (or languages derived
The following options control the dialect of C (or languages derived
from C, such as \*(C+, Objective-C and Objective\-\*(C+) that the compiler
from C, such as \*(C+, Objective-C and Objective\-\*(C+) that the compiler
accepts:
accepts:
.IP "\fB\-ansi\fR" 4
.IP "\fB\-ansi\fR" 4
.IX Item "-ansi"
.IX Item "-ansi"
In C mode, this is equivalent to \fB\-std=c90\fR. In \*(C+ mode, it is
In C mode, this is equivalent to \fB\-std=c90\fR. In \*(C+ mode, it is
equivalent to \fB\-std=c++98\fR.
equivalent to \fB\-std=c++98\fR.
.Sp
.Sp
This turns off certain features of \s-1GCC\s0 that are incompatible with \s-1ISO\s0
This turns off certain features of \s-1GCC\s0 that are incompatible with \s-1ISO\s0
C90 (when compiling C code), or of standard \*(C+ (when compiling \*(C+ code),
C90 (when compiling C code), or of standard \*(C+ (when compiling \*(C+ code),
such as the \f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`typeof\*(C'\fR keywords, and
such as the \f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`typeof\*(C'\fR keywords, and
predefined macros such as \f(CW\*(C`unix\*(C'\fR and \f(CW\*(C`vax\*(C'\fR that identify the
predefined macros such as \f(CW\*(C`unix\*(C'\fR and \f(CW\*(C`vax\*(C'\fR that identify the
type of system you are using.  It also enables the undesirable and
type of system you are using.  It also enables the undesirable and
rarely used \s-1ISO\s0 trigraph feature.  For the C compiler,
rarely used \s-1ISO\s0 trigraph feature.  For the C compiler,
it disables recognition of \*(C+ style \fB//\fR comments as well as
it disables recognition of \*(C+ style \fB//\fR comments as well as
the \f(CW\*(C`inline\*(C'\fR keyword.
the \f(CW\*(C`inline\*(C'\fR keyword.
.Sp
.Sp
The alternate keywords \f(CW\*(C`_\|_asm_\|_\*(C'\fR, \f(CW\*(C`_\|_extension_\|_\*(C'\fR,
The alternate keywords \f(CW\*(C`_\|_asm_\|_\*(C'\fR, \f(CW\*(C`_\|_extension_\|_\*(C'\fR,
\&\f(CW\*(C`_\|_inline_\|_\*(C'\fR and \f(CW\*(C`_\|_typeof_\|_\*(C'\fR continue to work despite
\&\f(CW\*(C`_\|_inline_\|_\*(C'\fR and \f(CW\*(C`_\|_typeof_\|_\*(C'\fR continue to work despite
\&\fB\-ansi\fR.  You would not want to use them in an \s-1ISO\s0 C program, of
\&\fB\-ansi\fR.  You would not want to use them in an \s-1ISO\s0 C program, of
course, but it is useful to put them in header files that might be included
course, but it is useful to put them in header files that might be included
in compilations done with \fB\-ansi\fR.  Alternate predefined macros
in compilations done with \fB\-ansi\fR.  Alternate predefined macros
such as \f(CW\*(C`_\|_unix_\|_\*(C'\fR and \f(CW\*(C`_\|_vax_\|_\*(C'\fR are also available, with or
such as \f(CW\*(C`_\|_unix_\|_\*(C'\fR and \f(CW\*(C`_\|_vax_\|_\*(C'\fR are also available, with or
without \fB\-ansi\fR.
without \fB\-ansi\fR.
.Sp
.Sp
The \fB\-ansi\fR option does not cause non-ISO programs to be
The \fB\-ansi\fR option does not cause non-ISO programs to be
rejected gratuitously.  For that, \fB\-pedantic\fR is required in
rejected gratuitously.  For that, \fB\-pedantic\fR is required in
addition to \fB\-ansi\fR.
addition to \fB\-ansi\fR.
.Sp
.Sp
The macro \f(CW\*(C`_\|_STRICT_ANSI_\|_\*(C'\fR is predefined when the \fB\-ansi\fR
The macro \f(CW\*(C`_\|_STRICT_ANSI_\|_\*(C'\fR is predefined when the \fB\-ansi\fR
option is used.  Some header files may notice this macro and refrain
option is used.  Some header files may notice this macro and refrain
from declaring certain functions or defining certain macros that the
from declaring certain functions or defining certain macros that the
\&\s-1ISO\s0 standard doesn't call for; this is to avoid interfering with any
\&\s-1ISO\s0 standard doesn't call for; this is to avoid interfering with any
programs that might use these names for other things.
programs that might use these names for other things.
.Sp
.Sp
Functions that would normally be built in but do not have semantics
Functions that would normally be built in but do not have semantics
defined by \s-1ISO\s0 C (such as \f(CW\*(C`alloca\*(C'\fR and \f(CW\*(C`ffs\*(C'\fR) are not built-in
defined by \s-1ISO\s0 C (such as \f(CW\*(C`alloca\*(C'\fR and \f(CW\*(C`ffs\*(C'\fR) are not built-in
functions when \fB\-ansi\fR is used.
functions when \fB\-ansi\fR is used.
.IP "\fB\-std=\fR" 4
.IP "\fB\-std=\fR" 4
.IX Item "-std="
.IX Item "-std="
Determine the language standard.   This option
Determine the language standard.   This option
is currently only supported when compiling C or \*(C+.
is currently only supported when compiling C or \*(C+.
.Sp
.Sp
The compiler can accept several base standards, such as \fBc90\fR or
The compiler can accept several base standards, such as \fBc90\fR or
\&\fBc++98\fR, and \s-1GNU\s0 dialects of those standards, such as
\&\fBc++98\fR, and \s-1GNU\s0 dialects of those standards, such as
\&\fBgnu90\fR or \fBgnu++98\fR.  By specifying a base standard, the
\&\fBgnu90\fR or \fBgnu++98\fR.  By specifying a base standard, the
compiler will accept all programs following that standard and those
compiler will accept all programs following that standard and those
using \s-1GNU\s0 extensions that do not contradict it.  For example,
using \s-1GNU\s0 extensions that do not contradict it.  For example,
\&\fB\-std=c90\fR turns off certain features of \s-1GCC\s0 that are
\&\fB\-std=c90\fR turns off certain features of \s-1GCC\s0 that are
incompatible with \s-1ISO\s0 C90, such as the \f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`typeof\*(C'\fR
incompatible with \s-1ISO\s0 C90, such as the \f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`typeof\*(C'\fR
keywords, but not other \s-1GNU\s0 extensions that do not have a meaning in
keywords, but not other \s-1GNU\s0 extensions that do not have a meaning in
\&\s-1ISO\s0 C90, such as omitting the middle term of a \f(CW\*(C`?:\*(C'\fR
\&\s-1ISO\s0 C90, such as omitting the middle term of a \f(CW\*(C`?:\*(C'\fR
expression. On the other hand, by specifying a \s-1GNU\s0 dialect of a
expression. On the other hand, by specifying a \s-1GNU\s0 dialect of a
standard, all features the compiler support are enabled, even when
standard, all features the compiler support are enabled, even when
those features change the meaning of the base standard and some
those features change the meaning of the base standard and some
strict-conforming programs may be rejected.  The particular standard
strict-conforming programs may be rejected.  The particular standard
is used by \fB\-pedantic\fR to identify which features are \s-1GNU\s0
is used by \fB\-pedantic\fR to identify which features are \s-1GNU\s0
extensions given that version of the standard. For example
extensions given that version of the standard. For example
\&\fB\-std=gnu90 \-pedantic\fR would warn about \*(C+ style \fB//\fR
\&\fB\-std=gnu90 \-pedantic\fR would warn about \*(C+ style \fB//\fR
comments, while \fB\-std=gnu99 \-pedantic\fR would not.
comments, while \fB\-std=gnu99 \-pedantic\fR would not.
.Sp
.Sp
A value for this option must be provided; possible values are
A value for this option must be provided; possible values are
.RS 4
.RS 4
.IP "\fBc90\fR" 4
.IP "\fBc90\fR" 4
.IX Item "c90"
.IX Item "c90"
.PD 0
.PD 0
.IP "\fBc89\fR" 4
.IP "\fBc89\fR" 4
.IX Item "c89"
.IX Item "c89"
.IP "\fBiso9899:1990\fR" 4
.IP "\fBiso9899:1990\fR" 4
.IX Item "iso9899:1990"
.IX Item "iso9899:1990"
.PD
.PD
Support all \s-1ISO\s0 C90 programs (certain \s-1GNU\s0 extensions that conflict
Support all \s-1ISO\s0 C90 programs (certain \s-1GNU\s0 extensions that conflict
with \s-1ISO\s0 C90 are disabled). Same as \fB\-ansi\fR for C code.
with \s-1ISO\s0 C90 are disabled). Same as \fB\-ansi\fR for C code.
.IP "\fBiso9899:199409\fR" 4
.IP "\fBiso9899:199409\fR" 4
.IX Item "iso9899:199409"
.IX Item "iso9899:199409"
\&\s-1ISO\s0 C90 as modified in amendment 1.
\&\s-1ISO\s0 C90 as modified in amendment 1.
.IP "\fBc99\fR" 4
.IP "\fBc99\fR" 4
.IX Item "c99"
.IX Item "c99"
.PD 0
.PD 0
.IP "\fBc9x\fR" 4
.IP "\fBc9x\fR" 4
.IX Item "c9x"
.IX Item "c9x"
.IP "\fBiso9899:1999\fR" 4
.IP "\fBiso9899:1999\fR" 4
.IX Item "iso9899:1999"
.IX Item "iso9899:1999"
.IP "\fBiso9899:199x\fR" 4
.IP "\fBiso9899:199x\fR" 4
.IX Item "iso9899:199x"
.IX Item "iso9899:199x"
.PD
.PD
\&\s-1ISO\s0 C99.  Note that this standard is not yet fully supported; see
\&\s-1ISO\s0 C99.  Note that this standard is not yet fully supported; see
<\fBhttp://gcc.gnu.org/gcc\-4.5/c99status.html\fR> for more information.  The
<\fBhttp://gcc.gnu.org/gcc\-4.5/c99status.html\fR> for more information.  The
names \fBc9x\fR and \fBiso9899:199x\fR are deprecated.
names \fBc9x\fR and \fBiso9899:199x\fR are deprecated.
.IP "\fBgnu90\fR" 4
.IP "\fBgnu90\fR" 4
.IX Item "gnu90"
.IX Item "gnu90"
.PD 0
.PD 0
.IP "\fBgnu89\fR" 4
.IP "\fBgnu89\fR" 4
.IX Item "gnu89"
.IX Item "gnu89"
.PD
.PD
\&\s-1GNU\s0 dialect of \s-1ISO\s0 C90 (including some C99 features). This
\&\s-1GNU\s0 dialect of \s-1ISO\s0 C90 (including some C99 features). This
is the default for C code.
is the default for C code.
.IP "\fBgnu99\fR" 4
.IP "\fBgnu99\fR" 4
.IX Item "gnu99"
.IX Item "gnu99"
.PD 0
.PD 0
.IP "\fBgnu9x\fR" 4
.IP "\fBgnu9x\fR" 4
.IX Item "gnu9x"
.IX Item "gnu9x"
.PD
.PD
\&\s-1GNU\s0 dialect of \s-1ISO\s0 C99.  When \s-1ISO\s0 C99 is fully implemented in \s-1GCC\s0,
\&\s-1GNU\s0 dialect of \s-1ISO\s0 C99.  When \s-1ISO\s0 C99 is fully implemented in \s-1GCC\s0,
this will become the default.  The name \fBgnu9x\fR is deprecated.
this will become the default.  The name \fBgnu9x\fR is deprecated.
.IP "\fBc++98\fR" 4
.IP "\fBc++98\fR" 4
.IX Item "c++98"
.IX Item "c++98"
The 1998 \s-1ISO\s0 \*(C+ standard plus amendments. Same as \fB\-ansi\fR for
The 1998 \s-1ISO\s0 \*(C+ standard plus amendments. Same as \fB\-ansi\fR for
\&\*(C+ code.
\&\*(C+ code.
.IP "\fBgnu++98\fR" 4
.IP "\fBgnu++98\fR" 4
.IX Item "gnu++98"
.IX Item "gnu++98"
\&\s-1GNU\s0 dialect of \fB\-std=c++98\fR.  This is the default for
\&\s-1GNU\s0 dialect of \fB\-std=c++98\fR.  This is the default for
\&\*(C+ code.
\&\*(C+ code.
.IP "\fBc++0x\fR" 4
.IP "\fBc++0x\fR" 4
.IX Item "c++0x"
.IX Item "c++0x"
The working draft of the upcoming \s-1ISO\s0 \*(C+0x standard. This option
The working draft of the upcoming \s-1ISO\s0 \*(C+0x standard. This option
enables experimental features that are likely to be included in
enables experimental features that are likely to be included in
\&\*(C+0x. The working draft is constantly changing, and any feature that is
\&\*(C+0x. The working draft is constantly changing, and any feature that is
enabled by this flag may be removed from future versions of \s-1GCC\s0 if it is
enabled by this flag may be removed from future versions of \s-1GCC\s0 if it is
not part of the \*(C+0x standard.
not part of the \*(C+0x standard.
.IP "\fBgnu++0x\fR" 4
.IP "\fBgnu++0x\fR" 4
.IX Item "gnu++0x"
.IX Item "gnu++0x"
\&\s-1GNU\s0 dialect of \fB\-std=c++0x\fR. This option enables
\&\s-1GNU\s0 dialect of \fB\-std=c++0x\fR. This option enables
experimental features that may be removed in future versions of \s-1GCC\s0.
experimental features that may be removed in future versions of \s-1GCC\s0.
.RE
.RE
.RS 4
.RS 4
.RE
.RE
.IP "\fB\-fgnu89\-inline\fR" 4
.IP "\fB\-fgnu89\-inline\fR" 4
.IX Item "-fgnu89-inline"
.IX Item "-fgnu89-inline"
The option \fB\-fgnu89\-inline\fR tells \s-1GCC\s0 to use the traditional
The option \fB\-fgnu89\-inline\fR tells \s-1GCC\s0 to use the traditional
\&\s-1GNU\s0 semantics for \f(CW\*(C`inline\*(C'\fR functions when in C99 mode.
\&\s-1GNU\s0 semantics for \f(CW\*(C`inline\*(C'\fR functions when in C99 mode.
  This option
  This option
is accepted and ignored by \s-1GCC\s0 versions 4.1.3 up to but not including
is accepted and ignored by \s-1GCC\s0 versions 4.1.3 up to but not including
4.3.  In \s-1GCC\s0 versions 4.3 and later it changes the behavior of \s-1GCC\s0 in
4.3.  In \s-1GCC\s0 versions 4.3 and later it changes the behavior of \s-1GCC\s0 in
C99 mode.  Using this option is roughly equivalent to adding the
C99 mode.  Using this option is roughly equivalent to adding the
\&\f(CW\*(C`gnu_inline\*(C'\fR function attribute to all inline functions.
\&\f(CW\*(C`gnu_inline\*(C'\fR function attribute to all inline functions.
.Sp
.Sp
The option \fB\-fno\-gnu89\-inline\fR explicitly tells \s-1GCC\s0 to use the
The option \fB\-fno\-gnu89\-inline\fR explicitly tells \s-1GCC\s0 to use the
C99 semantics for \f(CW\*(C`inline\*(C'\fR when in C99 or gnu99 mode (i.e., it
C99 semantics for \f(CW\*(C`inline\*(C'\fR when in C99 or gnu99 mode (i.e., it
specifies the default behavior).  This option was first supported in
specifies the default behavior).  This option was first supported in
\&\s-1GCC\s0 4.3.  This option is not supported in \fB\-std=c90\fR or
\&\s-1GCC\s0 4.3.  This option is not supported in \fB\-std=c90\fR or
\&\fB\-std=gnu90\fR mode.
\&\fB\-std=gnu90\fR mode.
.Sp
.Sp
The preprocessor macros \f(CW\*(C`_\|_GNUC_GNU_INLINE_\|_\*(C'\fR and
The preprocessor macros \f(CW\*(C`_\|_GNUC_GNU_INLINE_\|_\*(C'\fR and
\&\f(CW\*(C`_\|_GNUC_STDC_INLINE_\|_\*(C'\fR may be used to check which semantics are
\&\f(CW\*(C`_\|_GNUC_STDC_INLINE_\|_\*(C'\fR may be used to check which semantics are
in effect for \f(CW\*(C`inline\*(C'\fR functions.
in effect for \f(CW\*(C`inline\*(C'\fR functions.
.IP "\fB\-aux\-info\fR \fIfilename\fR" 4
.IP "\fB\-aux\-info\fR \fIfilename\fR" 4
.IX Item "-aux-info filename"
.IX Item "-aux-info filename"
Output to the given filename prototyped declarations for all functions
Output to the given filename prototyped declarations for all functions
declared and/or defined in a translation unit, including those in header
declared and/or defined in a translation unit, including those in header
files.  This option is silently ignored in any language other than C.
files.  This option is silently ignored in any language other than C.
.Sp
.Sp
Besides declarations, the file indicates, in comments, the origin of
Besides declarations, the file indicates, in comments, the origin of
each declaration (source file and line), whether the declaration was
each declaration (source file and line), whether the declaration was
implicit, prototyped or unprototyped (\fBI\fR, \fBN\fR for new or
implicit, prototyped or unprototyped (\fBI\fR, \fBN\fR for new or
\&\fBO\fR for old, respectively, in the first character after the line
\&\fBO\fR for old, respectively, in the first character after the line
number and the colon), and whether it came from a declaration or a
number and the colon), and whether it came from a declaration or a
definition (\fBC\fR or \fBF\fR, respectively, in the following
definition (\fBC\fR or \fBF\fR, respectively, in the following
character).  In the case of function definitions, a K&R\-style list of
character).  In the case of function definitions, a K&R\-style list of
arguments followed by their declarations is also provided, inside
arguments followed by their declarations is also provided, inside
comments, after the declaration.
comments, after the declaration.
.IP "\fB\-fno\-asm\fR" 4
.IP "\fB\-fno\-asm\fR" 4
.IX Item "-fno-asm"
.IX Item "-fno-asm"
Do not recognize \f(CW\*(C`asm\*(C'\fR, \f(CW\*(C`inline\*(C'\fR or \f(CW\*(C`typeof\*(C'\fR as a
Do not recognize \f(CW\*(C`asm\*(C'\fR, \f(CW\*(C`inline\*(C'\fR or \f(CW\*(C`typeof\*(C'\fR as a
keyword, so that code can use these words as identifiers.  You can use
keyword, so that code can use these words as identifiers.  You can use
the keywords \f(CW\*(C`_\|_asm_\|_\*(C'\fR, \f(CW\*(C`_\|_inline_\|_\*(C'\fR and \f(CW\*(C`_\|_typeof_\|_\*(C'\fR
the keywords \f(CW\*(C`_\|_asm_\|_\*(C'\fR, \f(CW\*(C`_\|_inline_\|_\*(C'\fR and \f(CW\*(C`_\|_typeof_\|_\*(C'\fR
instead.  \fB\-ansi\fR implies \fB\-fno\-asm\fR.
instead.  \fB\-ansi\fR implies \fB\-fno\-asm\fR.
.Sp
.Sp
In \*(C+, this switch only affects the \f(CW\*(C`typeof\*(C'\fR keyword, since
In \*(C+, this switch only affects the \f(CW\*(C`typeof\*(C'\fR keyword, since
\&\f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`inline\*(C'\fR are standard keywords.  You may want to
\&\f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`inline\*(C'\fR are standard keywords.  You may want to
use the \fB\-fno\-gnu\-keywords\fR flag instead, which has the same
use the \fB\-fno\-gnu\-keywords\fR flag instead, which has the same
effect.  In C99 mode (\fB\-std=c99\fR or \fB\-std=gnu99\fR), this
effect.  In C99 mode (\fB\-std=c99\fR or \fB\-std=gnu99\fR), this
switch only affects the \f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`typeof\*(C'\fR keywords, since
switch only affects the \f(CW\*(C`asm\*(C'\fR and \f(CW\*(C`typeof\*(C'\fR keywords, since
\&\f(CW\*(C`inline\*(C'\fR is a standard keyword in \s-1ISO\s0 C99.
\&\f(CW\*(C`inline\*(C'\fR is a standard keyword in \s-1ISO\s0 C99.
.IP "\fB\-fno\-builtin\fR" 4
.IP "\fB\-fno\-builtin\fR" 4
.IX Item "-fno-builtin"
.IX Item "-fno-builtin"
.PD 0
.PD 0
.IP "\fB\-fno\-builtin\-\fR\fIfunction\fR" 4
.IP "\fB\-fno\-builtin\-\fR\fIfunction\fR" 4
.IX Item "-fno-builtin-function"
.IX Item "-fno-builtin-function"
.PD
.PD
Don't recognize built-in functions that do not begin with
Don't recognize built-in functions that do not begin with
\&\fB_\|_builtin_\fR as prefix.
\&\fB_\|_builtin_\fR as prefix.
.Sp
.Sp
\&\s-1GCC\s0 normally generates special code to handle certain built-in functions
\&\s-1GCC\s0 normally generates special code to handle certain built-in functions
more efficiently; for instance, calls to \f(CW\*(C`alloca\*(C'\fR may become single
more efficiently; for instance, calls to \f(CW\*(C`alloca\*(C'\fR may become single
instructions that adjust the stack directly, and calls to \f(CW\*(C`memcpy\*(C'\fR
instructions that adjust the stack directly, and calls to \f(CW\*(C`memcpy\*(C'\fR
may become inline copy loops.  The resulting code is often both smaller
may become inline copy loops.  The resulting code is often both smaller
and faster, but since the function calls no longer appear as such, you
and faster, but since the function calls no longer appear as such, you
cannot set a breakpoint on those calls, nor can you change the behavior
cannot set a breakpoint on those calls, nor can you change the behavior
of the functions by linking with a different library.  In addition,
of the functions by linking with a different library.  In addition,
when a function is recognized as a built-in function, \s-1GCC\s0 may use
when a function is recognized as a built-in function, \s-1GCC\s0 may use
information about that function to warn about problems with calls to
information about that function to warn about problems with calls to
that function, or to generate more efficient code, even if the
that function, or to generate more efficient code, even if the
resulting code still contains calls to that function.  For example,
resulting code still contains calls to that function.  For example,
warnings are given with \fB\-Wformat\fR for bad calls to
warnings are given with \fB\-Wformat\fR for bad calls to
\&\f(CW\*(C`printf\*(C'\fR, when \f(CW\*(C`printf\*(C'\fR is built in, and \f(CW\*(C`strlen\*(C'\fR is
\&\f(CW\*(C`printf\*(C'\fR, when \f(CW\*(C`printf\*(C'\fR is built in, and \f(CW\*(C`strlen\*(C'\fR is
known not to modify global memory.
known not to modify global memory.
.Sp
.Sp
With the \fB\-fno\-builtin\-\fR\fIfunction\fR option
With the \fB\-fno\-builtin\-\fR\fIfunction\fR option
only the built-in function \fIfunction\fR is
only the built-in function \fIfunction\fR is
disabled.  \fIfunction\fR must not begin with \fB_\|_builtin_\fR.  If a
disabled.  \fIfunction\fR must not begin with \fB_\|_builtin_\fR.  If a
function is named that is not built-in in this version of \s-1GCC\s0, this
function is named that is not built-in in this version of \s-1GCC\s0, this
option is ignored.  There is no corresponding
option is ignored.  There is no corresponding
\&\fB\-fbuiltin\-\fR\fIfunction\fR option; if you wish to enable
\&\fB\-fbuiltin\-\fR\fIfunction\fR option; if you wish to enable
built-in functions selectively when using \fB\-fno\-builtin\fR or
built-in functions selectively when using \fB\-fno\-builtin\fR or
\&\fB\-ffreestanding\fR, you may define macros such as:
\&\fB\-ffreestanding\fR, you may define macros such as:
.Sp
.Sp
.Vb 2
.Vb 2
\&        #define abs(n)          _\|_builtin_abs ((n))
\&        #define abs(n)          _\|_builtin_abs ((n))
\&        #define strcpy(d, s)    _\|_builtin_strcpy ((d), (s))
\&        #define strcpy(d, s)    _\|_builtin_strcpy ((d), (s))
.Ve
.Ve
.IP "\fB\-fhosted\fR" 4
.IP "\fB\-fhosted\fR" 4
.IX Item "-fhosted"
.IX Item "-fhosted"
Assert that compilation takes place in a hosted environment.  This implies
Assert that compilation takes place in a hosted environment.  This implies
\&\fB\-fbuiltin\fR.  A hosted environment is one in which the
\&\fB\-fbuiltin\fR.  A hosted environment is one in which the
entire standard library is available, and in which \f(CW\*(C`main\*(C'\fR has a return
entire standard library is available, and in which \f(CW\*(C`main\*(C'\fR has a return
type of \f(CW\*(C`int\*(C'\fR.  Examples are nearly everything except a kernel.
type of \f(CW\*(C`int\*(C'\fR.  Examples are nearly everything except a kernel.
This is equivalent to \fB\-fno\-freestanding\fR.
This is equivalent to \fB\-fno\-freestanding\fR.
.IP "\fB\-ffreestanding\fR" 4
.IP "\fB\-ffreestanding\fR" 4
.IX Item "-ffreestanding"
.IX Item "-ffreestanding"
Assert that compilation takes place in a freestanding environment.  This
Assert that compilation takes place in a freestanding environment.  This
implies \fB\-fno\-builtin\fR.  A freestanding environment
implies \fB\-fno\-builtin\fR.  A freestanding environment
is one in which the standard library may not exist, and program startup may
is one in which the standard library may not exist, and program startup may
not necessarily be at \f(CW\*(C`main\*(C'\fR.  The most obvious example is an \s-1OS\s0 kernel.
not necessarily be at \f(CW\*(C`main\*(C'\fR.  The most obvious example is an \s-1OS\s0 kernel.
This is equivalent to \fB\-fno\-hosted\fR.
This is equivalent to \fB\-fno\-hosted\fR.
.IP "\fB\-fopenmp\fR" 4
.IP "\fB\-fopenmp\fR" 4
.IX Item "-fopenmp"
.IX Item "-fopenmp"
Enable handling of OpenMP directives \f(CW\*(C`#pragma omp\*(C'\fR in C/\*(C+ and
Enable handling of OpenMP directives \f(CW\*(C`#pragma omp\*(C'\fR in C/\*(C+ and
\&\f(CW\*(C`!$omp\*(C'\fR in Fortran.  When \fB\-fopenmp\fR is specified, the
\&\f(CW\*(C`!$omp\*(C'\fR in Fortran.  When \fB\-fopenmp\fR is specified, the
compiler generates parallel code according to the OpenMP Application
compiler generates parallel code according to the OpenMP Application
Program Interface v3.0 <\fBhttp://www.openmp.org/\fR>.  This option
Program Interface v3.0 <\fBhttp://www.openmp.org/\fR>.  This option
implies \fB\-pthread\fR, and thus is only supported on targets that
implies \fB\-pthread\fR, and thus is only supported on targets that
have support for \fB\-pthread\fR.
have support for \fB\-pthread\fR.
.IP "\fB\-fms\-extensions\fR" 4
.IP "\fB\-fms\-extensions\fR" 4
.IX Item "-fms-extensions"
.IX Item "-fms-extensions"
Accept some non-standard constructs used in Microsoft header files.
Accept some non-standard constructs used in Microsoft header files.
.Sp
.Sp
Some cases of unnamed fields in structures and unions are only
Some cases of unnamed fields in structures and unions are only
accepted with this option.
accepted with this option.
.IP "\fB\-trigraphs\fR" 4
.IP "\fB\-trigraphs\fR" 4
.IX Item "-trigraphs"
.IX Item "-trigraphs"
Support \s-1ISO\s0 C trigraphs.  The \fB\-ansi\fR option (and \fB\-std\fR
Support \s-1ISO\s0 C trigraphs.  The \fB\-ansi\fR option (and \fB\-std\fR
options for strict \s-1ISO\s0 C conformance) implies \fB\-trigraphs\fR.
options for strict \s-1ISO\s0 C conformance) implies \fB\-trigraphs\fR.
.IP "\fB\-no\-integrated\-cpp\fR" 4
.IP "\fB\-no\-integrated\-cpp\fR" 4
.IX Item "-no-integrated-cpp"
.IX Item "-no-integrated-cpp"
Performs a compilation in two passes: preprocessing and compiling.  This
Performs a compilation in two passes: preprocessing and compiling.  This
option allows a user supplied \*(L"cc1\*(R", \*(L"cc1plus\*(R", or \*(L"cc1obj\*(R" via the
option allows a user supplied \*(L"cc1\*(R", \*(L"cc1plus\*(R", or \*(L"cc1obj\*(R" via the
\&\fB\-B\fR option.  The user supplied compilation step can then add in
\&\fB\-B\fR option.  The user supplied compilation step can then add in
an additional preprocessing step after normal preprocessing but before
an additional preprocessing step after normal preprocessing but before
compiling.  The default is to use the integrated cpp (internal cpp)
compiling.  The default is to use the integrated cpp (internal cpp)
.Sp
.Sp
The semantics of this option will change if \*(L"cc1\*(R", \*(L"cc1plus\*(R", and
The semantics of this option will change if \*(L"cc1\*(R", \*(L"cc1plus\*(R", and
\&\*(L"cc1obj\*(R" are merged.
\&\*(L"cc1obj\*(R" are merged.
.IP "\fB\-traditional\fR" 4
.IP "\fB\-traditional\fR" 4
.IX Item "-traditional"
.IX Item "-traditional"
.PD 0
.PD 0
.IP "\fB\-traditional\-cpp\fR" 4
.IP "\fB\-traditional\-cpp\fR" 4
.IX Item "-traditional-cpp"
.IX Item "-traditional-cpp"
.PD
.PD
Formerly, these options caused \s-1GCC\s0 to attempt to emulate a pre-standard
Formerly, these options caused \s-1GCC\s0 to attempt to emulate a pre-standard
C compiler.  They are now only supported with the \fB\-E\fR switch.
C compiler.  They are now only supported with the \fB\-E\fR switch.
The preprocessor continues to support a pre-standard mode.  See the \s-1GNU\s0
The preprocessor continues to support a pre-standard mode.  See the \s-1GNU\s0
\&\s-1CPP\s0 manual for details.
\&\s-1CPP\s0 manual for details.
.IP "\fB\-fcond\-mismatch\fR" 4
.IP "\fB\-fcond\-mismatch\fR" 4
.IX Item "-fcond-mismatch"
.IX Item "-fcond-mismatch"
Allow conditional expressions with mismatched types in the second and
Allow conditional expressions with mismatched types in the second and
third arguments.  The value of such an expression is void.  This option
third arguments.  The value of such an expression is void.  This option
is not supported for \*(C+.
is not supported for \*(C+.
.IP "\fB\-flax\-vector\-conversions\fR" 4
.IP "\fB\-flax\-vector\-conversions\fR" 4
.IX Item "-flax-vector-conversions"
.IX Item "-flax-vector-conversions"
Allow implicit conversions between vectors with differing numbers of
Allow implicit conversions between vectors with differing numbers of
elements and/or incompatible element types.  This option should not be
elements and/or incompatible element types.  This option should not be
used for new code.
used for new code.
.IP "\fB\-funsigned\-char\fR" 4
.IP "\fB\-funsigned\-char\fR" 4
.IX Item "-funsigned-char"
.IX Item "-funsigned-char"
Let the type \f(CW\*(C`char\*(C'\fR be unsigned, like \f(CW\*(C`unsigned char\*(C'\fR.
Let the type \f(CW\*(C`char\*(C'\fR be unsigned, like \f(CW\*(C`unsigned char\*(C'\fR.
.Sp
.Sp
Each kind of machine has a default for what \f(CW\*(C`char\*(C'\fR should
Each kind of machine has a default for what \f(CW\*(C`char\*(C'\fR should
be.  It is either like \f(CW\*(C`unsigned char\*(C'\fR by default or like
be.  It is either like \f(CW\*(C`unsigned char\*(C'\fR by default or like
\&\f(CW\*(C`signed char\*(C'\fR by default.
\&\f(CW\*(C`signed char\*(C'\fR by default.
.Sp
.Sp
Ideally, a portable program should always use \f(CW\*(C`signed char\*(C'\fR or
Ideally, a portable program should always use \f(CW\*(C`signed char\*(C'\fR or
\&\f(CW\*(C`unsigned char\*(C'\fR when it depends on the signedness of an object.
\&\f(CW\*(C`unsigned char\*(C'\fR when it depends on the signedness of an object.
But many programs have been written to use plain \f(CW\*(C`char\*(C'\fR and
But many programs have been written to use plain \f(CW\*(C`char\*(C'\fR and
expect it to be signed, or expect it to be unsigned, depending on the
expect it to be signed, or expect it to be unsigned, depending on the
machines they were written for.  This option, and its inverse, let you
machines they were written for.  This option, and its inverse, let you
make such a program work with the opposite default.
make such a program work with the opposite default.
.Sp
.Sp
The type \f(CW\*(C`char\*(C'\fR is always a distinct type from each of
The type \f(CW\*(C`char\*(C'\fR is always a distinct type from each of
\&\f(CW\*(C`signed char\*(C'\fR or \f(CW\*(C`unsigned char\*(C'\fR, even though its behavior
\&\f(CW\*(C`signed char\*(C'\fR or \f(CW\*(C`unsigned char\*(C'\fR, even though its behavior
is always just like one of those two.
is always just like one of those two.
.IP "\fB\-fsigned\-char\fR" 4
.IP "\fB\-fsigned\-char\fR" 4
.IX Item "-fsigned-char"
.IX Item "-fsigned-char"
Let the type \f(CW\*(C`char\*(C'\fR be signed, like \f(CW\*(C`signed char\*(C'\fR.
Let the type \f(CW\*(C`char\*(C'\fR be signed, like \f(CW\*(C`signed char\*(C'\fR.
.Sp
.Sp
Note that this is equivalent to \fB\-fno\-unsigned\-char\fR, which is
Note that this is equivalent to \fB\-fno\-unsigned\-char\fR, which is
the negative form of \fB\-funsigned\-char\fR.  Likewise, the option
the negative form of \fB\-funsigned\-char\fR.  Likewise, the option
\&\fB\-fno\-signed\-char\fR is equivalent to \fB\-funsigned\-char\fR.
\&\fB\-fno\-signed\-char\fR is equivalent to \fB\-funsigned\-char\fR.
.IP "\fB\-fsigned\-bitfields\fR" 4
.IP "\fB\-fsigned\-bitfields\fR" 4
.IX Item "-fsigned-bitfields"
.IX Item "-fsigned-bitfields"
.PD 0
.PD 0
.IP "\fB\-funsigned\-bitfields\fR" 4
.IP "\fB\-funsigned\-bitfields\fR" 4
.IX Item "-funsigned-bitfields"
.IX Item "-funsigned-bitfields"
.IP "\fB\-fno\-signed\-bitfields\fR" 4
.IP "\fB\-fno\-signed\-bitfields\fR" 4
.IX Item "-fno-signed-bitfields"
.IX Item "-fno-signed-bitfields"
.IP "\fB\-fno\-unsigned\-bitfields\fR" 4
.IP "\fB\-fno\-unsigned\-bitfields\fR" 4
.IX Item "-fno-unsigned-bitfields"
.IX Item "-fno-unsigned-bitfields"
.PD
.PD
These options control whether a bit-field is signed or unsigned, when the
These options control whether a bit-field is signed or unsigned, when the
declaration does not use either \f(CW\*(C`signed\*(C'\fR or \f(CW\*(C`unsigned\*(C'\fR.  By
declaration does not use either \f(CW\*(C`signed\*(C'\fR or \f(CW\*(C`unsigned\*(C'\fR.  By
default, such a bit-field is signed, because this is consistent: the
default, such a bit-field is signed, because this is consistent: the
basic integer types such as \f(CW\*(C`int\*(C'\fR are signed types.
basic integer types such as \f(CW\*(C`int\*(C'\fR are signed types.
.Sh "Options Controlling \*(C+ Dialect"
.Sh "Options Controlling \*(C+ Dialect"
.IX Subsection "Options Controlling  Dialect"
.IX Subsection "Options Controlling  Dialect"
This section describes the command-line options that are only meaningful
This section describes the command-line options that are only meaningful
for \*(C+ programs; but you can also use most of the \s-1GNU\s0 compiler options
for \*(C+ programs; but you can also use most of the \s-1GNU\s0 compiler options
regardless of what language your program is in.  For example, you
regardless of what language your program is in.  For example, you
might compile a file \f(CW\*(C`firstClass.C\*(C'\fR like this:
might compile a file \f(CW\*(C`firstClass.C\*(C'\fR like this:
.PP
.PP
.Vb 1
.Vb 1
\&        g++ \-g \-frepo \-O \-c firstClass.C
\&        g++ \-g \-frepo \-O \-c firstClass.C
.Ve
.Ve
.PP
.PP
In this example, only \fB\-frepo\fR is an option meant
In this example, only \fB\-frepo\fR is an option meant
only for \*(C+ programs; you can use the other options with any
only for \*(C+ programs; you can use the other options with any
language supported by \s-1GCC\s0.
language supported by \s-1GCC\s0.
.PP
.PP
Here is a list of options that are \fIonly\fR for compiling \*(C+ programs:
Here is a list of options that are \fIonly\fR for compiling \*(C+ programs:
.IP "\fB\-fabi\-version=\fR\fIn\fR" 4
.IP "\fB\-fabi\-version=\fR\fIn\fR" 4
.IX Item "-fabi-version=n"
.IX Item "-fabi-version=n"
Use version \fIn\fR of the \*(C+ \s-1ABI\s0.  Version 2 is the version of the
Use version \fIn\fR of the \*(C+ \s-1ABI\s0.  Version 2 is the version of the
\&\*(C+ \s-1ABI\s0 that first appeared in G++ 3.4.  Version 1 is the version of
\&\*(C+ \s-1ABI\s0 that first appeared in G++ 3.4.  Version 1 is the version of
the \*(C+ \s-1ABI\s0 that first appeared in G++ 3.2.  Version 0 will always be
the \*(C+ \s-1ABI\s0 that first appeared in G++ 3.2.  Version 0 will always be
the version that conforms most closely to the \*(C+ \s-1ABI\s0 specification.
the version that conforms most closely to the \*(C+ \s-1ABI\s0 specification.
Therefore, the \s-1ABI\s0 obtained using version 0 will change as \s-1ABI\s0 bugs
Therefore, the \s-1ABI\s0 obtained using version 0 will change as \s-1ABI\s0 bugs
are fixed.
are fixed.
.Sp
.Sp
The default is version 2.
The default is version 2.
.Sp
.Sp
Version 3 corrects an error in mangling a constant address as a
Version 3 corrects an error in mangling a constant address as a
template argument.
template argument.
.Sp
.Sp
Version 4 implements a standard mangling for vector types.
Version 4 implements a standard mangling for vector types.
.Sp
.Sp
See also \fB\-Wabi\fR.
See also \fB\-Wabi\fR.
.IP "\fB\-fno\-access\-control\fR" 4
.IP "\fB\-fno\-access\-control\fR" 4
.IX Item "-fno-access-control"
.IX Item "-fno-access-control"
Turn off all access checking.  This switch is mainly useful for working
Turn off all access checking.  This switch is mainly useful for working
around bugs in the access control code.
around bugs in the access control code.
.IP "\fB\-fcheck\-new\fR" 4
.IP "\fB\-fcheck\-new\fR" 4
.IX Item "-fcheck-new"
.IX Item "-fcheck-new"
Check that the pointer returned by \f(CW\*(C`operator new\*(C'\fR is non-null
Check that the pointer returned by \f(CW\*(C`operator new\*(C'\fR is non-null
before attempting to modify the storage allocated.  This check is
before attempting to modify the storage allocated.  This check is
normally unnecessary because the \*(C+ standard specifies that
normally unnecessary because the \*(C+ standard specifies that
\&\f(CW\*(C`operator new\*(C'\fR will only return \f(CW0\fR if it is declared
\&\f(CW\*(C`operator new\*(C'\fR will only return \f(CW0\fR if it is declared
\&\fB\f(BIthrow()\fB\fR, in which case the compiler will always check the
\&\fB\f(BIthrow()\fB\fR, in which case the compiler will always check the
return value even without this option.  In all other cases, when
return value even without this option.  In all other cases, when
\&\f(CW\*(C`operator new\*(C'\fR has a non-empty exception specification, memory
\&\f(CW\*(C`operator new\*(C'\fR has a non-empty exception specification, memory
exhaustion is signalled by throwing \f(CW\*(C`std::bad_alloc\*(C'\fR.  See also
exhaustion is signalled by throwing \f(CW\*(C`std::bad_alloc\*(C'\fR.  See also
\&\fBnew (nothrow)\fR.
\&\fBnew (nothrow)\fR.
.IP "\fB\-fconserve\-space\fR" 4
.IP "\fB\-fconserve\-space\fR" 4
.IX Item "-fconserve-space"
.IX Item "-fconserve-space"
Put uninitialized or runtime-initialized global variables into the
Put uninitialized or runtime-initialized global variables into the
common segment, as C does.  This saves space in the executable at the
common segment, as C does.  This saves space in the executable at the
cost of not diagnosing duplicate definitions.  If you compile with this
cost of not diagnosing duplicate definitions.  If you compile with this
flag and your program mysteriously crashes after \f(CW\*(C`main()\*(C'\fR has
flag and your program mysteriously crashes after \f(CW\*(C`main()\*(C'\fR has
completed, you may have an object that is being destroyed twice because
completed, you may have an object that is being destroyed twice because
two definitions were merged.
two definitions were merged.
.Sp
.Sp
This option is no longer useful on most targets, now that support has
This option is no longer useful on most targets, now that support has
been added for putting variables into \s-1BSS\s0 without making them common.
been added for putting variables into \s-1BSS\s0 without making them common.
.IP "\fB\-fno\-deduce\-init\-list\fR" 4
.IP "\fB\-fno\-deduce\-init\-list\fR" 4
.IX Item "-fno-deduce-init-list"
.IX Item "-fno-deduce-init-list"
Disable deduction of a template type parameter as
Disable deduction of a template type parameter as
std::initializer_list from a brace-enclosed initializer list, i.e.
std::initializer_list from a brace-enclosed initializer list, i.e.
.Sp
.Sp
.Vb 4
.Vb 4
\&        template  auto forward(T t) \-> decltype (realfn (t))
\&        template  auto forward(T t) \-> decltype (realfn (t))
\&        {
\&        {
\&          return realfn (t);
\&          return realfn (t);
\&        }
\&        }
\&
\&
\&        void f()
\&        void f()
\&        {
\&        {
\&          forward({1,2}); // call forward>
\&          forward({1,2}); // call forward>
\&        }
\&        }
.Ve
.Ve
.Sp
.Sp
This option is present because this deduction is an extension to the
This option is present because this deduction is an extension to the
current specification in the \*(C+0x working draft, and there was
current specification in the \*(C+0x working draft, and there was
some concern about potential overload resolution problems.
some concern about potential overload resolution problems.
.IP "\fB\-ffriend\-injection\fR" 4
.IP "\fB\-ffriend\-injection\fR" 4
.IX Item "-ffriend-injection"
.IX Item "-ffriend-injection"
Inject friend functions into the enclosing namespace, so that they are
Inject friend functions into the enclosing namespace, so that they are
visible outside the scope of the class in which they are declared.
visible outside the scope of the class in which they are declared.
Friend functions were documented to work this way in the old Annotated
Friend functions were documented to work this way in the old Annotated
\&\*(C+ Reference Manual, and versions of G++ before 4.1 always worked
\&\*(C+ Reference Manual, and versions of G++ before 4.1 always worked
that way.  However, in \s-1ISO\s0 \*(C+ a friend function which is not declared
that way.  However, in \s-1ISO\s0 \*(C+ a friend function which is not declared
in an enclosing scope can only be found using argument dependent
in an enclosing scope can only be found using argument dependent
lookup.  This option causes friends to be injected as they were in
lookup.  This option causes friends to be injected as they were in
earlier releases.
earlier releases.
.Sp
.Sp
This option is for compatibility, and may be removed in a future
This option is for compatibility, and may be removed in a future
release of G++.
release of G++.
.IP "\fB\-fno\-elide\-constructors\fR" 4
.IP "\fB\-fno\-elide\-constructors\fR" 4
.IX Item "-fno-elide-constructors"
.IX Item "-fno-elide-constructors"
The \*(C+ standard allows an implementation to omit creating a temporary
The \*(C+ standard allows an implementation to omit creating a temporary
which is only used to initialize another object of the same type.
which is only used to initialize another object of the same type.
Specifying this option disables that optimization, and forces G++ to
Specifying this option disables that optimization, and forces G++ to
call the copy constructor in all cases.
call the copy constructor in all cases.
.IP "\fB\-fno\-enforce\-eh\-specs\fR" 4
.IP "\fB\-fno\-enforce\-eh\-specs\fR" 4
.IX Item "-fno-enforce-eh-specs"
.IX Item "-fno-enforce-eh-specs"
Don't generate code to check for violation of exception specifications
Don't generate code to check for violation of exception specifications
at runtime.  This option violates the \*(C+ standard, but may be useful
at runtime.  This option violates the \*(C+ standard, but may be useful
for reducing code size in production builds, much like defining
for reducing code size in production builds, much like defining
\&\fB\s-1NDEBUG\s0\fR.  This does not give user code permission to throw
\&\fB\s-1NDEBUG\s0\fR.  This does not give user code permission to throw
exceptions in violation of the exception specifications; the compiler
exceptions in violation of the exception specifications; the compiler
will still optimize based on the specifications, so throwing an
will still optimize based on the specifications, so throwing an
unexpected exception will result in undefined behavior.
unexpected exception will result in undefined behavior.
.IP "\fB\-ffor\-scope\fR" 4
.IP "\fB\-ffor\-scope\fR" 4
.IX Item "-ffor-scope"
.IX Item "-ffor-scope"
.PD 0
.PD 0
.IP "\fB\-fno\-for\-scope\fR" 4
.IP "\fB\-fno\-for\-scope\fR" 4
.IX Item "-fno-for-scope"
.IX Item "-fno-for-scope"
.PD
.PD
If \fB\-ffor\-scope\fR is specified, the scope of variables declared in
If \fB\-ffor\-scope\fR is specified, the scope of variables declared in
a \fIfor-init-statement\fR is limited to the \fBfor\fR loop itself,
a \fIfor-init-statement\fR is limited to the \fBfor\fR loop itself,
as specified by the \*(C+ standard.
as specified by the \*(C+ standard.
If \fB\-fno\-for\-scope\fR is specified, the scope of variables declared in
If \fB\-fno\-for\-scope\fR is specified, the scope of variables declared in
a \fIfor-init-statement\fR extends to the end of the enclosing scope,
a \fIfor-init-statement\fR extends to the end of the enclosing scope,
as was the case in old versions of G++, and other (traditional)
as was the case in old versions of G++, and other (traditional)
implementations of \*(C+.
implementations of \*(C+.
.Sp
.Sp
The default if neither flag is given to follow the standard,
The default if neither flag is given to follow the standard,
but to allow and give a warning for old-style code that would
but to allow and give a warning for old-style code that would
otherwise be invalid, or have different behavior.
otherwise be invalid, or have different behavior.
.IP "\fB\-fno\-gnu\-keywords\fR" 4
.IP "\fB\-fno\-gnu\-keywords\fR" 4
.IX Item "-fno-gnu-keywords"
.IX Item "-fno-gnu-keywords"
Do not recognize \f(CW\*(C`typeof\*(C'\fR as a keyword, so that code can use this
Do not recognize \f(CW\*(C`typeof\*(C'\fR as a keyword, so that code can use this
word as an identifier.  You can use the keyword \f(CW\*(C`_\|_typeof_\|_\*(C'\fR instead.
word as an identifier.  You can use the keyword \f(CW\*(C`_\|_typeof_\|_\*(C'\fR instead.
\&\fB\-ansi\fR implies \fB\-fno\-gnu\-keywords\fR.
\&\fB\-ansi\fR implies \fB\-fno\-gnu\-keywords\fR.
.IP "\fB\-fno\-implicit\-templates\fR" 4
.IP "\fB\-fno\-implicit\-templates\fR" 4
.IX Item "-fno-implicit-templates"
.IX Item "-fno-implicit-templates"
Never emit code for non-inline templates which are instantiated
Never emit code for non-inline templates which are instantiated
implicitly (i.e. by use); only emit code for explicit instantiations.
implicitly (i.e. by use); only emit code for explicit instantiations.
.IP "\fB\-fno\-implicit\-inline\-templates\fR" 4
.IP "\fB\-fno\-implicit\-inline\-templates\fR" 4
.IX Item "-fno-implicit-inline-templates"
.IX Item "-fno-implicit-inline-templates"
Don't emit code for implicit instantiations of inline templates, either.
Don't emit code for implicit instantiations of inline templates, either.
The default is to handle inlines differently so that compiles with and
The default is to handle inlines differently so that compiles with and
without optimization will need the same set of explicit instantiations.
without optimization will need the same set of explicit instantiations.
.IP "\fB\-fno\-implement\-inlines\fR" 4
.IP "\fB\-fno\-implement\-inlines\fR" 4
.IX Item "-fno-implement-inlines"
.IX Item "-fno-implement-inlines"
To save space, do not emit out-of-line copies of inline functions
To save space, do not emit out-of-line copies of inline functions
controlled by \fB#pragma implementation\fR.  This will cause linker
controlled by \fB#pragma implementation\fR.  This will cause linker
errors if these functions are not inlined everywhere they are called.
errors if these functions are not inlined everywhere they are called.
.IP "\fB\-fms\-extensions\fR" 4
.IP "\fB\-fms\-extensions\fR" 4
.IX Item "-fms-extensions"
.IX Item "-fms-extensions"
Disable pedantic warnings about constructs used in \s-1MFC\s0, such as implicit
Disable pedantic warnings about constructs used in \s-1MFC\s0, such as implicit
int and getting a pointer to member function via non-standard syntax.
int and getting a pointer to member function via non-standard syntax.
.IP "\fB\-fno\-nonansi\-builtins\fR" 4
.IP "\fB\-fno\-nonansi\-builtins\fR" 4
.IX Item "-fno-nonansi-builtins"
.IX Item "-fno-nonansi-builtins"
Disable built-in declarations of functions that are not mandated by
Disable built-in declarations of functions that are not mandated by
\&\s-1ANSI/ISO\s0 C.  These include \f(CW\*(C`ffs\*(C'\fR, \f(CW\*(C`alloca\*(C'\fR, \f(CW\*(C`_exit\*(C'\fR,
\&\s-1ANSI/ISO\s0 C.  These include \f(CW\*(C`ffs\*(C'\fR, \f(CW\*(C`alloca\*(C'\fR, \f(CW\*(C`_exit\*(C'\fR,
\&\f(CW\*(C`index\*(C'\fR, \f(CW\*(C`bzero\*(C'\fR, \f(CW\*(C`conjf\*(C'\fR, and other related functions.
\&\f(CW\*(C`index\*(C'\fR, \f(CW\*(C`bzero\*(C'\fR, \f(CW\*(C`conjf\*(C'\fR, and other related functions.
.IP "\fB\-fno\-operator\-names\fR" 4
.IP "\fB\-fno\-operator\-names\fR" 4
.IX Item "-fno-operator-names"
.IX Item "-fno-operator-names"
Do not treat the operator name keywords \f(CW\*(C`and\*(C'\fR, \f(CW\*(C`bitand\*(C'\fR,
Do not treat the operator name keywords \f(CW\*(C`and\*(C'\fR, \f(CW\*(C`bitand\*(C'\fR,
\&\f(CW\*(C`bitor\*(C'\fR, \f(CW\*(C`compl\*(C'\fR, \f(CW\*(C`not\*(C'\fR, \f(CW\*(C`or\*(C'\fR and \f(CW\*(C`xor\*(C'\fR as
\&\f(CW\*(C`bitor\*(C'\fR, \f(CW\*(C`compl\*(C'\fR, \f(CW\*(C`not\*(C'\fR, \f(CW\*(C`or\*(C'\fR and \f(CW\*(C`xor\*(C'\fR as
synonyms as keywords.
synonyms as keywords.
.IP "\fB\-fno\-optional\-diags\fR" 4
.IP "\fB\-fno\-optional\-diags\fR" 4
.IX Item "-fno-optional-diags"
.IX Item "-fno-optional-diags"
Disable diagnostics that the standard says a compiler does not need to
Disable diagnostics that the standard says a compiler does not need to
issue.  Currently, the only such diagnostic issued by G++ is the one for
issue.  Currently, the only such diagnostic issued by G++ is the one for
a name having multiple meanings within a class.
a name having multiple meanings within a class.
.IP "\fB\-fpermissive\fR" 4
.IP "\fB\-fpermissive\fR" 4
.IX Item "-fpermissive"
.IX Item "-fpermissive"
Downgrade some diagnostics about nonconformant code from errors to
Downgrade some diagnostics about nonconformant code from errors to
warnings.  Thus, using \fB\-fpermissive\fR will allow some
warnings.  Thus, using \fB\-fpermissive\fR will allow some
nonconforming code to compile.
nonconforming code to compile.
.IP "\fB\-fno\-pretty\-templates\fR" 4
.IP "\fB\-fno\-pretty\-templates\fR" 4
.IX Item "-fno-pretty-templates"
.IX Item "-fno-pretty-templates"
When an error message refers to a specialization of a function
When an error message refers to a specialization of a function
template, the compiler will normally print the signature of the
template, the compiler will normally print the signature of the
template followed by the template arguments and any typedefs or
template followed by the template arguments and any typedefs or
typenames in the signature (e.g. \f(CW\*(C`void f(T) [with T = int]\*(C'\fR
typenames in the signature (e.g. \f(CW\*(C`void f(T) [with T = int]\*(C'\fR
rather than \f(CW\*(C`void f(int)\*(C'\fR) so that it's clear which template is
rather than \f(CW\*(C`void f(int)\*(C'\fR) so that it's clear which template is
involved.  When an error message refers to a specialization of a class
involved.  When an error message refers to a specialization of a class
template, the compiler will omit any template arguments which match
template, the compiler will omit any template arguments which match
the default template arguments for that template.  If either of these
the default template arguments for that template.  If either of these
behaviors make it harder to understand the error message rather than
behaviors make it harder to understand the error message rather than
easier, using \fB\-fno\-pretty\-templates\fR will disable them.
easier, using \fB\-fno\-pretty\-templates\fR will disable them.
.IP "\fB\-frepo\fR" 4
.IP "\fB\-frepo\fR" 4
.IX Item "-frepo"
.IX Item "-frepo"
Enable automatic template instantiation at link time.  This option also
Enable automatic template instantiation at link time.  This option also
implies \fB\-fno\-implicit\-templates\fR.
implies \fB\-fno\-implicit\-templates\fR.
.IP "\fB\-fno\-rtti\fR" 4
.IP "\fB\-fno\-rtti\fR" 4
.IX Item "-fno-rtti"
.IX Item "-fno-rtti"
Disable generation of information about every class with virtual
Disable generation of information about every class with virtual
functions for use by the \*(C+ runtime type identification features
functions for use by the \*(C+ runtime type identification features
(\fBdynamic_cast\fR and \fBtypeid\fR).  If you don't use those parts
(\fBdynamic_cast\fR and \fBtypeid\fR).  If you don't use those parts
of the language, you can save some space by using this flag.  Note that
of the language, you can save some space by using this flag.  Note that
exception handling uses the same information, but it will generate it as
exception handling uses the same information, but it will generate it as
needed. The \fBdynamic_cast\fR operator can still be used for casts that
needed. The \fBdynamic_cast\fR operator can still be used for casts that
do not require runtime type information, i.e. casts to \f(CW\*(C`void *\*(C'\fR or to
do not require runtime type information, i.e. casts to \f(CW\*(C`void *\*(C'\fR or to
unambiguous base classes.
unambiguous base classes.
.IP "\fB\-fstats\fR" 4
.IP "\fB\-fstats\fR" 4
.IX Item "-fstats"
.IX Item "-fstats"
Emit statistics about front-end processing at the end of the compilation.
Emit statistics about front-end processing at the end of the compilation.
This information is generally only useful to the G++ development team.
This information is generally only useful to the G++ development team.
.IP "\fB\-ftemplate\-depth=\fR\fIn\fR" 4
.IP "\fB\-ftemplate\-depth=\fR\fIn\fR" 4
.IX Item "-ftemplate-depth=n"
.IX Item "-ftemplate-depth=n"
Set the maximum instantiation depth for template classes to \fIn\fR.
Set the maximum instantiation depth for template classes to \fIn\fR.
A limit on the template instantiation depth is needed to detect
A limit on the template instantiation depth is needed to detect
endless recursions during template class instantiation.  \s-1ANSI/ISO\s0 \*(C+
endless recursions during template class instantiation.  \s-1ANSI/ISO\s0 \*(C+
conforming programs must not rely on a maximum depth greater than 17
conforming programs must not rely on a maximum depth greater than 17
(changed to 1024 in \*(C+0x).
(changed to 1024 in \*(C+0x).
.IP "\fB\-fno\-threadsafe\-statics\fR" 4
.IP "\fB\-fno\-threadsafe\-statics\fR" 4
.IX Item "-fno-threadsafe-statics"
.IX Item "-fno-threadsafe-statics"
Do not emit the extra code to use the routines specified in the \*(C+
Do not emit the extra code to use the routines specified in the \*(C+
\&\s-1ABI\s0 for thread-safe initialization of local statics.  You can use this
\&\s-1ABI\s0 for thread-safe initialization of local statics.  You can use this
option to reduce code size slightly in code that doesn't need to be
option to reduce code size slightly in code that doesn't need to be
thread-safe.
thread-safe.
.IP "\fB\-fuse\-cxa\-atexit\fR" 4
.IP "\fB\-fuse\-cxa\-atexit\fR" 4
.IX Item "-fuse-cxa-atexit"
.IX Item "-fuse-cxa-atexit"
Register destructors for objects with static storage duration with the
Register destructors for objects with static storage duration with the
\&\f(CW\*(C`_\|_cxa_atexit\*(C'\fR function rather than the \f(CW\*(C`atexit\*(C'\fR function.
\&\f(CW\*(C`_\|_cxa_atexit\*(C'\fR function rather than the \f(CW\*(C`atexit\*(C'\fR function.
This option is required for fully standards-compliant handling of static
This option is required for fully standards-compliant handling of static
destructors, but will only work if your C library supports
destructors, but will only work if your C library supports
\&\f(CW\*(C`_\|_cxa_atexit\*(C'\fR.
\&\f(CW\*(C`_\|_cxa_atexit\*(C'\fR.
.IP "\fB\-fno\-use\-cxa\-get\-exception\-ptr\fR" 4
.IP "\fB\-fno\-use\-cxa\-get\-exception\-ptr\fR" 4
.IX Item "-fno-use-cxa-get-exception-ptr"
.IX Item "-fno-use-cxa-get-exception-ptr"
Don't use the \f(CW\*(C`_\|_cxa_get_exception_ptr\*(C'\fR runtime routine.  This
Don't use the \f(CW\*(C`_\|_cxa_get_exception_ptr\*(C'\fR runtime routine.  This
will cause \f(CW\*(C`std::uncaught_exception\*(C'\fR to be incorrect, but is necessary
will cause \f(CW\*(C`std::uncaught_exception\*(C'\fR to be incorrect, but is necessary
if the runtime routine is not available.
if the runtime routine is not available.
.IP "\fB\-fvisibility\-inlines\-hidden\fR" 4
.IP "\fB\-fvisibility\-inlines\-hidden\fR" 4
.IX Item "-fvisibility-inlines-hidden"
.IX Item "-fvisibility-inlines-hidden"
This switch declares that the user does not attempt to compare
This switch declares that the user does not attempt to compare
pointers to inline methods where the addresses of the two functions
pointers to inline methods where the addresses of the two functions
were taken in different shared objects.
were taken in different shared objects.
.Sp
.Sp
The effect of this is that \s-1GCC\s0 may, effectively, mark inline methods with
The effect of this is that \s-1GCC\s0 may, effectively, mark inline methods with
\&\f(CW\*(C`_\|_attribute_\|_ ((visibility ("hidden")))\*(C'\fR so that they do not
\&\f(CW\*(C`_\|_attribute_\|_ ((visibility ("hidden")))\*(C'\fR so that they do not
appear in the export table of a \s-1DSO\s0 and do not require a \s-1PLT\s0 indirection
appear in the export table of a \s-1DSO\s0 and do not require a \s-1PLT\s0 indirection
when used within the \s-1DSO\s0.  Enabling this option can have a dramatic effect
when used within the \s-1DSO\s0.  Enabling this option can have a dramatic effect
on load and link times of a \s-1DSO\s0 as it massively reduces the size of the
on load and link times of a \s-1DSO\s0 as it massively reduces the size of the
dynamic export table when the library makes heavy use of templates.
dynamic export table when the library makes heavy use of templates.
.Sp
.Sp
The behavior of this switch is not quite the same as marking the
The behavior of this switch is not quite the same as marking the
methods as hidden directly, because it does not affect static variables
methods as hidden directly, because it does not affect static variables
local to the function or cause the compiler to deduce that
local to the function or cause the compiler to deduce that
the function is defined in only one shared object.
the function is defined in only one shared object.
.Sp
.Sp
You may mark a method as having a visibility explicitly to negate the
You may mark a method as having a visibility explicitly to negate the
effect of the switch for that method.  For example, if you do want to
effect of the switch for that method.  For example, if you do want to
compare pointers to a particular inline method, you might mark it as
compare pointers to a particular inline method, you might mark it as
having default visibility.  Marking the enclosing class with explicit
having default visibility.  Marking the enclosing class with explicit
visibility will have no effect.
visibility will have no effect.
.Sp
.Sp
Explicitly instantiated inline methods are unaffected by this option
Explicitly instantiated inline methods are unaffected by this option
as their linkage might otherwise cross a shared library boundary.
as their linkage might otherwise cross a shared library boundary.
.IP "\fB\-fvisibility\-ms\-compat\fR" 4
.IP "\fB\-fvisibility\-ms\-compat\fR" 4
.IX Item "-fvisibility-ms-compat"
.IX Item "-fvisibility-ms-compat"
This flag attempts to use visibility settings to make \s-1GCC\s0's \*(C+
This flag attempts to use visibility settings to make \s-1GCC\s0's \*(C+
linkage model compatible with that of Microsoft Visual Studio.
linkage model compatible with that of Microsoft Visual Studio.
.Sp
.Sp
The flag makes these changes to \s-1GCC\s0's linkage model:
The flag makes these changes to \s-1GCC\s0's linkage model:
.RS 4
.RS 4
.IP "1." 4
.IP "1." 4
It sets the default visibility to \f(CW\*(C`hidden\*(C'\fR, like
It sets the default visibility to \f(CW\*(C`hidden\*(C'\fR, like
\&\fB\-fvisibility=hidden\fR.
\&\fB\-fvisibility=hidden\fR.
.IP "2." 4
.IP "2." 4
Types, but not their members, are not hidden by default.
Types, but not their members, are not hidden by default.
.IP "3." 4
.IP "3." 4
The One Definition Rule is relaxed for types without explicit
The One Definition Rule is relaxed for types without explicit
visibility specifications which are defined in more than one different
visibility specifications which are defined in more than one different
shared object: those declarations are permitted if they would have
shared object: those declarations are permitted if they would have
been permitted when this option was not used.
been permitted when this option was not used.
.RE
.RE
.RS 4
.RS 4
.Sp
.Sp
In new code it is better to use \fB\-fvisibility=hidden\fR and
In new code it is better to use \fB\-fvisibility=hidden\fR and
export those classes which are intended to be externally visible.
export those classes which are intended to be externally visible.
Unfortunately it is possible for code to rely, perhaps accidentally,
Unfortunately it is possible for code to rely, perhaps accidentally,
on the Visual Studio behavior.
on the Visual Studio behavior.
.Sp
.Sp
Among the consequences of these changes are that static data members
Among the consequences of these changes are that static data members
of the same type with the same name but defined in different shared
of the same type with the same name but defined in different shared
objects will be different, so changing one will not change the other;
objects will be different, so changing one will not change the other;
and that pointers to function members defined in different shared
and that pointers to function members defined in different shared
objects may not compare equal.  When this flag is given, it is a
objects may not compare equal.  When this flag is given, it is a
violation of the \s-1ODR\s0 to define types with the same name differently.
violation of the \s-1ODR\s0 to define types with the same name differently.
.RE
.RE
.IP "\fB\-fno\-weak\fR" 4
.IP "\fB\-fno\-weak\fR" 4
.IX Item "-fno-weak"
.IX Item "-fno-weak"
Do not use weak symbol support, even if it is provided by the linker.
Do not use weak symbol support, even if it is provided by the linker.
By default, G++ will use weak symbols if they are available.  This
By default, G++ will use weak symbols if they are available.  This
option exists only for testing, and should not be used by end-users;
option exists only for testing, and should not be used by end-users;
it will result in inferior code and has no benefits.  This option may
it will result in inferior code and has no benefits.  This option may
be removed in a future release of G++.
be removed in a future release of G++.
.IP "\fB\-nostdinc++\fR" 4
.IP "\fB\-nostdinc++\fR" 4
.IX Item "-nostdinc++"
.IX Item "-nostdinc++"
Do not search for header files in the standard directories specific to
Do not search for header files in the standard directories specific to
\&\*(C+, but do still search the other standard directories.  (This option
\&\*(C+, but do still search the other standard directories.  (This option
is used when building the \*(C+ library.)
is used when building the \*(C+ library.)
.PP
.PP
In addition, these optimization, warning, and code generation options
In addition, these optimization, warning, and code generation options
have meanings only for \*(C+ programs:
have meanings only for \*(C+ programs:
.IP "\fB\-fno\-default\-inline\fR" 4
.IP "\fB\-fno\-default\-inline\fR" 4
.IX Item "-fno-default-inline"
.IX Item "-fno-default-inline"
Do not assume \fBinline\fR for functions defined inside a class scope.
Do not assume \fBinline\fR for functions defined inside a class scope.
  Note that these
  Note that these
functions will have linkage like inline functions; they just won't be
functions will have linkage like inline functions; they just won't be
inlined by default.
inlined by default.
.IP "\fB\-Wabi\fR (C, Objective-C, \*(C+ and Objective\-\*(C+ only)" 4
.IP "\fB\-Wabi\fR (C, Objective-C, \*(C+ and Objective\-\*(C+ only)" 4
.IX Item "-Wabi (C, Objective-C,  and Objective- only)"
.IX Item "-Wabi (C, Objective-C,  and Objective- only)"
Warn when G++ generates code that is probably not compatible with the
Warn when G++ generates code that is probably not compatible with the
vendor-neutral \*(C+ \s-1ABI\s0.  Although an effort has been made to warn about
vendor-neutral \*(C+ \s-1ABI\s0.  Although an effort has been made to warn about
all such cases, there are probably some cases that are not warned about,
all such cases, there are probably some cases that are not warned about,
even though G++ is generating incompatible code.  There may also be
even though G++ is generating incompatible code.  There may also be
cases where warnings are emitted even though the code that is generated
cases where warnings are emitted even though the code that is generated
will be compatible.
will be compatible.
.Sp
.Sp
You should rewrite your code to avoid these warnings if you are
You should rewrite your code to avoid these warnings if you are
concerned about the fact that code generated by G++ may not be binary
concerned about the fact that code generated by G++ may not be binary
compatible with code generated by other compilers.
compatible with code generated by other compilers.
.Sp
.Sp
The known incompatibilities in \fB\-fabi\-version=2\fR (the default) include:
The known incompatibilities in \fB\-fabi\-version=2\fR (the default) include:
.RS 4
.RS 4
.IP "\(bu" 4
.IP "\(bu" 4
A template with a non-type template parameter of reference type is
A template with a non-type template parameter of reference type is
mangled incorrectly:
mangled incorrectly:
.Sp
.Sp
.Vb 3
.Vb 3
\&        extern int N;
\&        extern int N;
\&        template  struct S {};
\&        template  struct S {};
\&        void n (S) {2}
\&        void n (S) {2}
.Ve
.Ve
.Sp
.Sp
This is fixed in \fB\-fabi\-version=3\fR.
This is fixed in \fB\-fabi\-version=3\fR.
.IP "\(bu" 4
.IP "\(bu" 4
\&\s-1SIMD\s0 vector types declared using \f(CW\*(C`_\|_attribute ((vector_size))\*(C'\fR are
\&\s-1SIMD\s0 vector types declared using \f(CW\*(C`_\|_attribute ((vector_size))\*(C'\fR are
mangled in a non-standard way that does not allow for overloading of
mangled in a non-standard way that does not allow for overloading of
functions taking vectors of different sizes.
functions taking vectors of different sizes.
.Sp
.Sp
The mangling is changed in \fB\-fabi\-version=4\fR.
The mangling is changed in \fB\-fabi\-version=4\fR.
.RE
.RE
.RS 4
.RS 4
.Sp
.Sp
The known incompatibilities in \fB\-fabi\-version=1\fR include:
The known incompatibilities in \fB\-fabi\-version=1\fR include:
.IP "\(bu" 4
.IP "\(bu" 4
Incorrect handling of tail-padding for bit-fields.  G++ may attempt to
Incorrect handling of tail-padding for bit-fields.  G++ may attempt to
pack data into the same byte as a base class.  For example:
pack data into the same byte as a base class.  For example:
.Sp
.Sp
.Vb 2
.Vb 2
\&        struct A { virtual void f(); int f1 : 1; };
\&        struct A { virtual void f(); int f1 : 1; };
\&        struct B : public A { int f2 : 1; };
\&        struct B : public A { int f2 : 1; };
.Ve
.Ve
.Sp
.Sp
In this case, G++ will place \f(CW\*(C`B::f2\*(C'\fR into the same byte
In this case, G++ will place \f(CW\*(C`B::f2\*(C'\fR into the same byte
as\f(CW\*(C`A::f1\*(C'\fR; other compilers will not.  You can avoid this problem
as\f(CW\*(C`A::f1\*(C'\fR; other compilers will not.  You can avoid this problem
by explicitly padding \f(CW\*(C`A\*(C'\fR so that its size is a multiple of the
by explicitly padding \f(CW\*(C`A\*(C'\fR so that its size is a multiple of the
byte size on your platform; that will cause G++ and other compilers to
byte size on your platform; that will cause G++ and other compilers to
layout \f(CW\*(C`B\*(C'\fR identically.
layout \f(CW\*(C`B\*(C'\fR identically.
.IP "\(bu" 4
.IP "\(bu" 4
Incorrect handling of tail-padding for virtual bases.  G++ does not use
Incorrect handling of tail-padding for virtual bases.  G++ does not use
tail padding when laying out virtual bases.  For example:
tail padding when laying out virtual bases.  For example:
.Sp
.Sp
.Vb 3
.Vb 3
\&        struct A { virtual void f(); char c1; };
\&        struct A { virtual void f(); char c1; };
\&        struct B { B(); char c2; };
\&        struct B { B(); char c2; };
\&        struct C : public A, public virtual B {};
\&        struct C : public A, public virtual B {};
.Ve
.Ve
.Sp
.Sp
In this case, G++ will not place \f(CW\*(C`B\*(C'\fR into the tail-padding for
In this case, G++ will not place \f(CW\*(C`B\*(C'\fR into the tail-padding for
\&\f(CW\*(C`A\*(C'\fR; other compilers will.  You can avoid this problem by
\&\f(CW\*(C`A\*(C'\fR; other compilers will.  You can avoid this problem by
explicitly padding \f(CW\*(C`A\*(C'\fR so that its size is a multiple of its
explicitly padding \f(CW\*(C`A\*(C'\fR so that its size is a multiple of its
alignment (ignoring virtual base classes); that will cause G++ and other
alignment (ignoring virtual base classes); that will cause G++ and other
compilers to layout \f(CW\*(C`C\*(C'\fR identically.
compilers to layout \f(CW\*(C`C\*(C'\fR identically.
.IP "\(bu" 4
.IP "\(bu" 4
Incorrect handling of bit-fields with declared widths greater than that
Incorrect handling of bit-fields with declared widths greater than that
of their underlying types, when the bit-fields appear in a union.  For
of their underlying types, when the bit-fields appear in a union.  For
example:
example:
.Sp
.Sp
.Vb 1
.Vb 1
\&        union U { int i : 4096; };
\&        union U { int i : 4096; };
.Ve
.Ve
.Sp
.Sp
Assuming that an \f(CW\*(C`int\*(C'\fR does not have 4096 bits, G++ will make the
Assuming that an \f(CW\*(C`int\*(C'\fR does not have 4096 bits, G++ will make the
union too small by the number of bits in an \f(CW\*(C`int\*(C'\fR.
union too small by the number of bits in an \f(CW\*(C`int\*(C'\fR.
.IP "\(bu" 4
.IP "\(bu" 4
Empty classes can be placed at incorrect offsets.  For example:
Empty classes can be placed at incorrect offsets.  For example:
.Sp
.Sp
.Vb 1
.Vb 1
\&        struct A {};
\&        struct A {};
\&
\&
\&        struct B {
\&        struct B {
\&          A a;
\&          A a;
\&          virtual void f ();
\&          virtual void f ();
\&        };
\&        };
\&
\&
\&        struct C : public B, public A {};
\&        struct C : public B, public A {};
.Ve
.Ve
.Sp
.Sp
G++ will place the \f(CW\*(C`A\*(C'\fR base class of \f(CW\*(C`C\*(C'\fR at a nonzero offset;
G++ will place the \f(CW\*(C`A\*(C'\fR base class of \f(CW\*(C`C\*(C'\fR at a nonzero offset;
it should be placed at offset zero.  G++ mistakenly believes that the
it should be placed at offset zero.  G++ mistakenly believes that the
\&\f(CW\*(C`A\*(C'\fR data member of \f(CW\*(C`B\*(C'\fR is already at offset zero.
\&\f(CW\*(C`A\*(C'\fR data member of \f(CW\*(C`B\*(C'\fR is already at offset zero.
.IP "\(bu" 4
.IP "\(bu" 4
Names of template functions whose types involve \f(CW\*(C`typename\*(C'\fR or
Names of template functions whose types involve \f(CW\*(C`typename\*(C'\fR or
template template parameters can be mangled incorrectly.
template template parameters can be mangled incorrectly.
.Sp
.Sp
.Vb 2
.Vb 2
\&        template 
\&        template 
\&        void f(typename Q::X) {}
\&        void f(typename Q::X) {}
\&
\&
\&        template