X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=gcc%2Fdoc%2Fgcc.1;fp=gcc%2Fdoc%2Fgcc.1;h=d7ca1b27cc8318090f02ccb57dc82cb521d47020;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=fc6fdd9aa46700508696b2d8daafc6ce62b947fe;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/gcc/doc/gcc.1 b/gcc/doc/gcc.1 index fc6fdd9a..d7ca1b27 100644 --- a/gcc/doc/gcc.1 +++ b/gcc/doc/gcc.1 @@ -1,8 +1,7 @@ -.\" Automatically generated by Pod::Man version 1.15 -.\" Tue Apr 22 07:07:29 2003 +.\" Automatically generated by Pod::Man 2.16 (Pod::Simple 3.07) .\" .\" Standard preamble: -.\" ====================================================================== +.\" ======================================================================== .de Sh \" Subsection heading .br .if t .Sp @@ -15,12 +14,6 @@ .if t .sp .5v .if n .sp .. -.de Ip \" List item -.br -.ie \\n(.$>=3 .ne \\$3 -.el .ne 3 -.IP "\\$1" \\$2 -.. .de Vb \" Begin verbatim text .ft CW .nf @@ -28,16 +21,15 @@ .. .de Ve \" End verbatim text .ft R - .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left -.\" double quote, and \*(R" will give a right double quote. | will give a -.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used -.\" to do unbreakable dashes and therefore won't be available. \*(C` and -.\" \*(C' expand to `' in nroff, nothing in troff, for use with C<> -.tr \(*W-|\(bv\*(Tr +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. Capital omega is used to do unbreakable dashes and +.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, +.\" nothing in troff, for use with C<>. +.tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- @@ -56,26 +48,28 @@ . ds R" '' 'br\} .\" -.\" If the F register is turned on, we'll generate index entries on stderr -.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and -.\" index entries marked with X<> in POD. Of course, you'll have to process -.\" the output yourself in some meaningful fashion. -.if \nF \{\ +.\" Escape single quotes in literal strings from groff's Unicode transform. +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" +.\" If the F register is turned on, we'll generate index entries on stderr for +.\" titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and index +.\" entries marked with X<> in POD. Of course, you'll have to process the +.\" output yourself in some meaningful fashion. +.ie \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . nr % 0 . rr F .\} -.\" -.\" For nroff, turn off justification. Always turn off hyphenation; it -.\" makes way too many mistakes in technical documents. -.hy 0 -.if n .na +.el \{\ +. de IX +.. +.\} .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. -.bd B 3 . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 @@ -135,13 +129,16 @@ . ds Ae AE .\} .rm #[ #] #H #V #F C -.\" ====================================================================== +.\" ======================================================================== .\" .IX Title "GCC 1" -.TH GCC 1 "gcc-3.2.3" "2003-04-22" "GNU" -.UC +.TH GCC 1 "2010-01-21" "gcc-4.4.3" "GNU" +.\" For nroff, turn off justification. Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh .SH "NAME" -gcc \- \s-1GNU\s0 project C and \*(C+ compiler +gcc \- GNU project C and C++ compiler .SH "SYNOPSIS" .IX Header "SYNOPSIS" gcc [\fB\-c\fR|\fB\-S\fR|\fB\-E\fR] [\fB\-std=\fR\fIstandard\fR] @@ -150,14 +147,14 @@ gcc [\fB\-c\fR|\fB\-S\fR|\fB\-E\fR] [\fB\-std=\fR\fIstandard\fR] [\fB\-I\fR\fIdir\fR...] [\fB\-L\fR\fIdir\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\-o\fR \fIoutfile\fR] \fIinfile\fR... + [\fB\-o\fR \fIoutfile\fR] [@\fIfile\fR] \fIinfile\fR... .PP Only the most useful options are listed here; see below for the remainder. \fBg++\fR accepts mostly the same options as \fBgcc\fR. .SH "DESCRIPTION" .IX Header "DESCRIPTION" When you invoke \s-1GCC\s0, it normally does preprocessing, compilation, -assembly and linking. The ``overall options'' 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 says not to run the linker. Then the output consists of object files output by the assembler. @@ -175,18 +172,19 @@ that option with all supported languages. .PP The \fBgcc\fR program accepts options and file names as operands. Many options have multi-letter names; therefore multiple single-letter options -may \fInot\fR be grouped: \fB\-dr\fR is very different from \fB\-d\ \-r\fR. +may \fInot\fR be grouped: \fB\-dv\fR is very different from \fB\-d\ \-v\fR. .PP 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 options -of the same kind; for example, if you specify \fB\-L\fR more than once, -the directories are searched in the order specified. +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 +than once, the directories are searched in the order specified. Also, +the placement of the \fB\-l\fR option is significant. .PP Many options have long names starting with \fB\-f\fR or with -\&\fB\-W\fR\-\-\-for example, \fB\-fforce-mem\fR, -\&\fB\-fstrength-reduce\fR, \fB\-Wformat\fR and so on. Most of +\&\fB\-W\fR\-\-\-for example, +\&\fB\-fmove\-loop\-invariants\fR, \fB\-Wformat\fR and so on. Most 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. .SH "OPTIONS" .IX Header "OPTIONS" @@ -194,632 +192,892 @@ only one of these two forms, whichever one is not the default. .IX Subsection "Option Summary" Here is a summary of all the options, grouped by type. Explanations are in the following sections. -.Ip "\fIOverall Options\fR" 4 +.IP "\fIOverall Options\fR" 4 .IX Item "Overall Options" -\&\fB\-c \-S \-E \-o\fR \fIfile\fR \fB\-pipe \-pass-exit-codes \-x\fR \fIlanguage\fR -\&\fB\-v \-### \-\-help \-\-target-help \-\-version\fR -.Ip "\fIC Language Options\fR" 4 +\&\fB\-c \-S \-E \-o\fR \fIfile\fR \fB\-combine \-pipe \-pass\-exit\-codes +\&\-x\fR \fIlanguage\fR \fB\-v \-### \-\-help\fR[\fB=\fR\fIclass\fR[\fB,...\fR]] \fB\-\-target\-help +\&\-\-version \-wrapper@\fR\fIfile\fR +.IP "\fIC Language Options\fR" 4 .IX Item "C Language Options" -\&\fB\-ansi \-std=\fR\fIstandard\fR \fB\-aux-info\fR \fIfilename\fR -\&\fB\-fno-asm \-fno-builtin \-fno-builtin-\fR\fIfunction\fR -\&\fB\-fhosted \-ffreestanding -\&\-trigraphs \-no-integrated-cpp \-traditional \-traditional-cpp -\&\-fallow-single-precision \-fcond-mismatch -\&\-fsigned-bitfields \-fsigned-char -\&\-funsigned-bitfields \-funsigned-char -\&\-fwritable-strings\fR -.Ip "\fI\*(C+ Language Options\fR" 4 +\&\fB\-ansi \-std=\fR\fIstandard\fR \fB\-fgnu89\-inline +\&\-aux\-info\fR \fIfilename\fR +\&\fB\-fno\-asm \-fno\-builtin \-fno\-builtin\-\fR\fIfunction\fR +\&\fB\-fhosted \-ffreestanding \-fopenmp \-fms\-extensions +\&\-trigraphs \-no\-integrated\-cpp \-traditional \-traditional\-cpp +\&\-fallow\-single\-precision \-fcond\-mismatch \-flax\-vector\-conversions +\&\-fsigned\-bitfields \-fsigned\-char +\&\-funsigned\-bitfields \-funsigned\-char\fR +.IP "\fI\*(C+ Language Options\fR" 4 .IX Item " Language Options" -\&\fB\-fno-access-control \-fcheck-new \-fconserve-space -\&\-fno-const-strings \-fdollars-in-identifiers -\&\-fno-elide-constructors -\&\-fno-enforce-eh-specs \-fexternal-templates -\&\-falt-external-templates -\&\-ffor-scope \-fno-for-scope \-fno-gnu-keywords -\&\-fno-implicit-templates -\&\-fno-implicit-inline-templates -\&\-fno-implement-inlines \-fms-extensions -\&\-fno-nonansi-builtins \-fno-operator-names -\&\-fno-optional-diags \-fpermissive -\&\-frepo \-fno-rtti \-fstats \-ftemplate-depth-\fR\fIn\fR -\&\fB\-fuse-cxa-atexit \-fvtable-gc \-fno-weak \-nostdinc++ -\&\-fno-default-inline \-Wabi \-Wctor-dtor-privacy -\&\-Wnon-virtual-dtor \-Wreorder -\&\-Weffc++ \-Wno-deprecated -\&\-Wno-non-template-friend \-Wold-style-cast -\&\-Woverloaded-virtual \-Wno-pmf-conversions -\&\-Wsign-promo \-Wsynth\fR -.Ip "\fIObjective-C Language Options\fR" 4 -.IX Item "Objective-C Language Options" -\&\fB\-fconstant-string-class=\fR\fIclass-name\fR -\&\fB\-fgnu-runtime \-fnext-runtime \-gen-decls -\&\-Wno-protocol \-Wselector\fR -.Ip "\fILanguage Independent Options\fR" 4 +\&\fB\-fabi\-version=\fR\fIn\fR \fB\-fno\-access\-control \-fcheck\-new +\&\-fconserve\-space \-ffriend\-injection +\&\-fno\-elide\-constructors +\&\-fno\-enforce\-eh\-specs +\&\-ffor\-scope \-fno\-for\-scope \-fno\-gnu\-keywords +\&\-fno\-implicit\-templates +\&\-fno\-implicit\-inline\-templates +\&\-fno\-implement\-inlines \-fms\-extensions +\&\-fno\-nonansi\-builtins \-fno\-operator\-names +\&\-fno\-optional\-diags \-fpermissive +\&\-frepo \-fno\-rtti \-fstats \-ftemplate\-depth\-\fR\fIn\fR +\&\fB\-fno\-threadsafe\-statics \-fuse\-cxa\-atexit \-fno\-weak \-nostdinc++ +\&\-fno\-default\-inline \-fvisibility\-inlines\-hidden +\&\-fvisibility\-ms\-compat +\&\-Wabi \-Wctor\-dtor\-privacy +\&\-Wnon\-virtual\-dtor \-Wreorder +\&\-Weffc++ \-Wstrict\-null\-sentinel +\&\-Wno\-non\-template\-friend \-Wold\-style\-cast +\&\-Woverloaded\-virtual \-Wno\-pmf\-conversions +\&\-Wsign\-promo\fR +.IP "\fIObjective-C and Objective\-\*(C+ Language Options\fR" 4 +.IX Item "Objective-C and Objective- Language Options" +\&\fB\-fconstant\-string\-class=\fR\fIclass-name\fR +\&\fB\-fgnu\-runtime \-fnext\-runtime +\&\-fno\-nil\-receivers +\&\-fobjc\-call\-cxx\-cdtors +\&\-fobjc\-direct\-dispatch +\&\-fobjc\-exceptions +\&\-fobjc\-gc +\&\-freplace\-objc\-classes +\&\-fzero\-link +\&\-gen\-decls +\&\-Wassign\-intercept +\&\-Wno\-protocol \-Wselector +\&\-Wstrict\-selector\-match +\&\-Wundeclared\-selector\fR +.IP "\fILanguage Independent Options\fR" 4 .IX Item "Language Independent Options" -\&\fB\-fmessage-length=\fR\fIn\fR -\&\fB\-fdiagnostics-show-location=\fR[\fBonce\fR|\fBevery-line\fR] -.Ip "\fIWarning Options\fR" 4 +\&\fB\-fmessage\-length=\fR\fIn\fR +\&\fB\-fdiagnostics\-show\-location=\fR[\fBonce\fR|\fBevery-line\fR] +\&\fB\-fdiagnostics\-show\-option\fR +.IP "\fIWarning Options\fR" 4 .IX Item "Warning Options" -\&\fB\-fsyntax-only \-pedantic \-pedantic-errors -\&\-w \-W \-Wall \-Waggregate-return -\&\-Wcast-align \-Wcast-qual \-Wchar-subscripts \-Wcomment -\&\-Wconversion \-Wno-deprecated-declarations -\&\-Wdisabled-optimization \-Wdiv-by-zero \-Werror -\&\-Wfloat-equal \-Wformat \-Wformat=2 -\&\-Wformat-nonliteral \-Wformat-security -\&\-Wimplicit \-Wimplicit-int -\&\-Wimplicit-function-declaration -\&\-Werror-implicit-function-declaration -\&\-Wimport \-Winline -\&\-Wlarger-than-\fR\fIlen\fR \fB\-Wlong-long -\&\-Wmain \-Wmissing-braces -\&\-Wmissing-format-attribute \-Wmissing-noreturn -\&\-Wmultichar \-Wno-format-extra-args \-Wno-format-y2k -\&\-Wno-import \-Wpacked \-Wpadded -\&\-Wparentheses \-Wpointer-arith \-Wredundant-decls -\&\-Wreturn-type \-Wsequence-point \-Wshadow -\&\-Wsign-compare \-Wswitch \-Wsystem-headers -\&\-Wtrigraphs \-Wundef \-Wuninitialized -\&\-Wunknown-pragmas \-Wunreachable-code -\&\-Wunused \-Wunused-function \-Wunused-label \-Wunused-parameter -\&\-Wunused-value \-Wunused-variable \-Wwrite-strings\fR -.Ip "\fIC-only Warning Options\fR" 4 -.IX Item "C-only Warning Options" -\&\fB\-Wbad-function-cast \-Wmissing-declarations -\&\-Wmissing-prototypes \-Wnested-externs -\&\-Wstrict-prototypes \-Wtraditional\fR -.Ip "\fIDebugging Options\fR" 4 +\&\fB\-fsyntax\-only \-pedantic \-pedantic\-errors +\&\-w \-Wextra \-Wall \-Waddress \-Waggregate\-return \-Warray\-bounds +\&\-Wno\-attributes \-Wno\-builtin\-macro\-redefined +\&\-Wc++\-compat \-Wc++0x\-compat \-Wcast\-align \-Wcast\-qual +\&\-Wchar\-subscripts \-Wclobbered \-Wcomment +\&\-Wconversion \-Wcoverage\-mismatch \-Wno\-deprecated +\&\-Wno\-deprecated\-declarations \-Wdisabled\-optimization +\&\-Wno\-div\-by\-zero \-Wempty\-body \-Wenum\-compare \-Wno\-endif\-labels +\&\-Werror \-Werror=* +\&\-Wfatal\-errors \-Wfloat\-equal \-Wformat \-Wformat=2 +\&\-Wno\-format\-contains\-nul \-Wno\-format\-extra\-args \-Wformat\-nonliteral +\&\-Wformat\-security \-Wformat\-y2k +\&\-Wframe\-larger\-than=\fR\fIlen\fR \fB\-Wignored\-qualifiers +\&\-Wimplicit \-Wimplicit\-function\-declaration \-Wimplicit\-int +\&\-Winit\-self \-Winline +\&\-Wno\-int\-to\-pointer\-cast \-Wno\-invalid\-offsetof +\&\-Winvalid\-pch \-Wlarger\-than=\fR\fIlen\fR \fB\-Wunsafe\-loop\-optimizations +\&\-Wlogical\-op \-Wlong\-long +\&\-Wmain \-Wmissing\-braces \-Wmissing\-field\-initializers +\&\-Wmissing\-format\-attribute \-Wmissing\-include\-dirs +\&\-Wmissing\-noreturn \-Wno\-mudflap +\&\-Wno\-multichar \-Wnonnull \-Wno\-overflow +\&\-Woverlength\-strings \-Wpacked \-Wpacked\-bitfield\-compat \-Wpadded +\&\-Wparentheses \-Wpedantic\-ms\-format \-Wno\-pedantic\-ms\-format +\&\-Wpointer\-arith \-Wno\-pointer\-to\-int\-cast +\&\-Wredundant\-decls +\&\-Wreturn\-type \-Wsequence\-point \-Wshadow +\&\-Wsign\-compare \-Wsign\-conversion \-Wstack\-protector +\&\-Wstrict\-aliasing \-Wstrict\-aliasing=n +\&\-Wstrict\-overflow \-Wstrict\-overflow=\fR\fIn\fR +\&\fB\-Wswitch \-Wswitch\-default \-Wswitch\-enum \-Wsync\-nand +\&\-Wsystem\-headers \-Wtrigraphs \-Wtype\-limits \-Wundef \-Wuninitialized +\&\-Wunknown\-pragmas \-Wno\-pragmas \-Wunreachable\-code +\&\-Wunused \-Wunused\-function \-Wunused\-label \-Wunused\-parameter +\&\-Wunused\-value \-Wunused\-variable +\&\-Wvariadic\-macros \-Wvla +\&\-Wvolatile\-register\-var \-Wwrite\-strings\fR +.IP "\fIC and Objective-C-only Warning Options\fR" 4 +.IX Item "C and Objective-C-only Warning Options" +\&\fB\-Wbad\-function\-cast \-Wmissing\-declarations +\&\-Wmissing\-parameter\-type \-Wmissing\-prototypes \-Wnested\-externs +\&\-Wold\-style\-declaration \-Wold\-style\-definition +\&\-Wstrict\-prototypes \-Wtraditional \-Wtraditional\-conversion +\&\-Wdeclaration\-after\-statement \-Wpointer\-sign\fR +.IP "\fIDebugging Options\fR" 4 .IX Item "Debugging Options" \&\fB\-d\fR\fIletters\fR \fB\-dumpspecs \-dumpmachine \-dumpversion -\&\-fdump-unnumbered \-fdump-translation-unit\fR[\fB-\fR\fIn\fR] -\&\fB\-fdump-class-hierarchy\fR[\fB-\fR\fIn\fR] -\&\fB\-fdump-tree-original\fR[\fB-\fR\fIn\fR] \fB\-fdump-tree-optimized\fR[\fB-\fR\fIn\fR] -\&\fB\-fdump-tree-inlined\fR[\fB-\fR\fIn\fR] -\&\fB\-fmem-report \-fpretend-float -\&\-fprofile-arcs \-fsched-verbose=\fR\fIn\fR -\&\fB\-ftest-coverage \-ftime-report -\&\-g \-g\fR\fIlevel\fR \fB\-gcoff \-gdwarf \-gdwarf-1 \-gdwarf-1+ \-gdwarf-2 +\&\-fdbg\-cnt\-list \-fdbg\-cnt=\fR\fIcounter-value-list\fR +\&\fB\-fdump\-noaddr \-fdump\-unnumbered +\&\-fdump\-translation\-unit\fR[\fB\-\fR\fIn\fR] +\&\fB\-fdump\-class\-hierarchy\fR[\fB\-\fR\fIn\fR] +\&\fB\-fdump\-ipa\-all \-fdump\-ipa\-cgraph \-fdump\-ipa\-inline +\&\-fdump\-statistics +\&\-fdump\-tree\-all +\&\-fdump\-tree\-original\fR[\fB\-\fR\fIn\fR] +\&\fB\-fdump\-tree\-optimized\fR[\fB\-\fR\fIn\fR] +\&\fB\-fdump\-tree\-cfg \-fdump\-tree\-vcg \-fdump\-tree\-alias +\&\-fdump\-tree\-ch +\&\-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\-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\-dse\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\-copyrename\fR[\fB\-\fR\fIn\fR] +\&\fB\-fdump\-tree\-nrv \-fdump\-tree\-vect +\&\-fdump\-tree\-sink +\&\-fdump\-tree\-sra\fR[\fB\-\fR\fIn\fR] +\&\fB\-fdump\-tree\-fre\fR[\fB\-\fR\fIn\fR] +\&\fB\-fdump\-tree\-vrp\fR[\fB\-\fR\fIn\fR] +\&\fB\-ftree\-vectorizer\-verbose=\fR\fIn\fR +\&\fB\-fdump\-tree\-storeccp\fR[\fB\-\fR\fIn\fR] +\&\fB\-feliminate\-dwarf2\-dups \-feliminate\-unused\-debug\-types +\&\-feliminate\-unused\-debug\-symbols \-femit\-class\-debug\-always +\&\-fmem\-report \-fpre\-ipa\-mem\-report \-fpost\-ipa\-mem\-report \-fprofile\-arcs +\&\-frandom\-seed=\fR\fIstring\fR \fB\-fsched\-verbose=\fR\fIn\fR +\&\fB\-fsel\-sched\-verbose \-fsel\-sched\-dump\-cfg \-fsel\-sched\-pipelining\-verbose +\&\-ftest\-coverage \-ftime\-report \-fvar\-tracking +\&\-g \-g\fR\fIlevel\fR \fB\-gcoff \-gdwarf\-2 \&\-ggdb \-gstabs \-gstabs+ \-gvms \-gxcoff \-gxcoff+ -\&\-p \-pg \-print-file-name=\fR\fIlibrary\fR \fB\-print-libgcc-file-name -\&\-print-multi-directory \-print-multi-lib -\&\-print-prog-name=\fR\fIprogram\fR \fB\-print-search-dirs \-Q -\&\-save-temps \-time\fR -.Ip "\fIOptimization Options\fR" 4 +\&\-fno\-merge\-debug\-strings \-fno\-dwarf2\-cfi\-asm +\&\-fdebug\-prefix\-map=\fR\fIold\fR\fB=\fR\fInew\fR +\&\fB\-femit\-struct\-debug\-baseonly \-femit\-struct\-debug\-reduced +\&\-femit\-struct\-debug\-detailed\fR[\fB=\fR\fIspec-list\fR] +\&\fB\-p \-pg \-print\-file\-name=\fR\fIlibrary\fR \fB\-print\-libgcc\-file\-name +\&\-print\-multi\-directory \-print\-multi\-lib +\&\-print\-prog\-name=\fR\fIprogram\fR \fB\-print\-search\-dirs \-Q +\&\-print\-sysroot \-print\-sysroot\-headers\-suffix +\&\-save\-temps \-time\fR +.IP "\fIOptimization Options\fR" 4 .IX Item "Optimization Options" -\&\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\-fbounds-check -\&\-fbranch-probabilities \-fcaller-saves \-fcprop-registers -\&\-fcse-follow-jumps \-fcse-skip-blocks \-fdata-sections -\&\-fdelayed-branch \-fdelete-null-pointer-checks -\&\-fexpensive-optimizations \-ffast-math \-ffloat-store -\&\-fforce-addr \-fforce-mem \-ffunction-sections -\&\-fgcse \-fgcse-lm \-fgcse-sm -\&\-finline-functions \-finline-limit=\fR\fIn\fR \fB\-fkeep-inline-functions -\&\-fkeep-static-consts \-fmerge-constants \-fmerge-all-constants -\&\-fmove-all-movables \-fno-branch-count-reg -\&\-fno-default-inline \-fno-defer-pop -\&\-fno-function-cse \-fno-guess-branch-probability -\&\-fno-inline \-fno-math-errno \-fno-peephole \-fno-peephole2 -\&\-funsafe-math-optimizations \-fno-trapping-math -\&\-fomit-frame-pointer \-foptimize-register-move -\&\-foptimize-sibling-calls \-fprefetch-loop-arrays -\&\-freduce-all-givs \-fregmove \-frename-registers -\&\-frerun-cse-after-loop \-frerun-loop-opt -\&\-fschedule-insns \-fschedule-insns2 -\&\-fno-sched-interblock \-fno-sched-spec -\&\-fsched-spec-load \-fsched-spec-load-dangerous -\&\-fsingle-precision-constant \-fssa \-fssa-ccp \-fssa-dce -\&\-fstrength-reduce \-fstrict-aliasing \-fthread-jumps -\&\-ftrapv \-funroll-all-loops \-funroll-loops +\&\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 +\&\-fauto\-inc\-dec \-fbranch\-probabilities \-fbranch\-target\-load\-optimize +\&\-fbranch\-target\-load\-optimize2 \-fbtr\-bb\-exclusive \-fcaller\-saves +\&\-fcheck\-data\-deps \-fconserve\-stack \-fcprop\-registers \-fcrossjumping +\&\-fcse\-follow\-jumps \-fcse\-skip\-blocks \-fcx\-fortran\-rules \-fcx\-limited\-range +\&\-fdata\-sections \-fdce \-fdce +\&\-fdelayed\-branch \-fdelete\-null\-pointer\-checks \-fdse \-fdse +\&\-fearly\-inlining \-fexpensive\-optimizations \-ffast\-math +\&\-ffinite\-math\-only \-ffloat\-store \-fforward\-propagate +\&\-ffunction\-sections \-fgcse \-fgcse\-after\-reload \-fgcse\-las \-fgcse\-lm +\&\-fgcse\-sm \-fif\-conversion \-fif\-conversion2 \-findirect\-inlining +\&\-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 +\&\-fipa\-pure\-const \-fipa\-reference \-fipa\-struct\-reorg +\&\-fipa\-type\-escape \-fira\-algorithm=\fR\fIalgorithm\fR +\&\fB\-fira\-region=\fR\fIregion\fR \fB\-fira\-coalesce \-fno\-ira\-share\-save\-slots +\&\-fno\-ira\-share\-spill\-slots \-fira\-verbose=\fR\fIn\fR +\&\fB\-fivopts \-fkeep\-inline\-functions \-fkeep\-static\-consts +\&\-floop\-block \-floop\-interchange \-floop\-strip\-mine +\&\-fmerge\-all\-constants \-fmerge\-constants \-fmodulo\-sched +\&\-fmodulo\-sched\-allow\-regmoves \-fmove\-loop\-invariants \-fmudflap +\&\-fmudflapir \-fmudflapth \-fno\-branch\-count\-reg \-fno\-default\-inline +\&\-fno\-defer\-pop \-fno\-function\-cse \-fno\-guess\-branch\-probability +\&\-fno\-inline \-fno\-math\-errno \-fno\-peephole \-fno\-peephole2 +\&\-fno\-sched\-interblock \-fno\-sched\-spec \-fno\-signed\-zeros +\&\-fno\-toplevel\-reorder \-fno\-trapping\-math \-fno\-zero\-initialized\-in\-bss +\&\-fomit\-frame\-pointer \-foptimize\-register\-move \-foptimize\-sibling\-calls +\&\-fpeel\-loops \-fpredictive\-commoning \-fprefetch\-loop\-arrays +\&\-fprofile\-correction \-fprofile\-dir=\fR\fIpath\fR \fB\-fprofile\-generate +\&\-fprofile\-generate=\fR\fIpath\fR +\&\fB\-fprofile\-use \-fprofile\-use=\fR\fIpath\fR \fB\-fprofile\-values +\&\-freciprocal\-math \-fregmove \-frename\-registers \-freorder\-blocks +\&\-freorder\-blocks\-and\-partition \-freorder\-functions +\&\-frerun\-cse\-after\-loop \-freschedule\-modulo\-scheduled\-loops +\&\-frounding\-math \-frtl\-abstract\-sequences \-fsched2\-use\-superblocks +\&\-fsched2\-use\-traces \-fsched\-spec\-load \-fsched\-spec\-load\-dangerous +\&\-fsched\-stalled\-insns\-dep[=\fR\fIn\fR\fB] \-fsched\-stalled\-insns[=\fR\fIn\fR\fB] +\&\-fschedule\-insns \-fschedule\-insns2 \-fsection\-anchors \-fsee +\&\-fselective\-scheduling \-fselective\-scheduling2 +\&\-fsel\-sched\-pipelining \-fsel\-sched\-pipelining\-outer\-loops +\&\-fsignaling\-nans \-fsingle\-precision\-constant \-fsplit\-ivs\-in\-unroller +\&\-fsplit\-wide\-types \-fstack\-protector \-fstack\-protector\-all +\&\-fstrict\-aliasing \-fstrict\-overflow \-fthread\-jumps \-ftracer +\&\-ftree\-builtin\-call\-dce \-ftree\-ccp \-ftree\-ch \-ftree\-copy\-prop +\&\-ftree\-copyrename \-ftree\-dce +\&\-ftree\-dominator\-opts \-ftree\-dse \-ftree\-fre \-ftree\-loop\-im +\&\-ftree\-loop\-distribution +\&\-ftree\-loop\-ivcanon \-ftree\-loop\-linear \-ftree\-loop\-optimize +\&\-ftree\-parallelize\-loops=\fR\fIn\fR \fB\-ftree\-pre \-ftree\-reassoc +\&\-ftree\-sink \-ftree\-sra \-ftree\-switch\-conversion +\&\-ftree\-ter \-ftree\-vect\-loop\-version \-ftree\-vectorize \-ftree\-vrp +\&\-funit\-at\-a\-time \-funroll\-all\-loops \-funroll\-loops +\&\-funsafe\-loop\-optimizations \-funsafe\-math\-optimizations \-funswitch\-loops +\&\-fvariable\-expansion\-in\-unroller \-fvect\-cost\-model \-fvpt \-fweb +\&\-fwhole\-program \&\-\-param\fR \fIname\fR\fB=\fR\fIvalue\fR \&\fB\-O \-O0 \-O1 \-O2 \-O3 \-Os\fR -.Ip "\fIPreprocessor Options\fR" 4 +.IP "\fIPreprocessor Options\fR" 4 .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 \&\-D\fR\fImacro\fR[\fB=\fR\fIdefn\fR] \fB\-E \-H \&\-idirafter\fR \fIdir\fR \&\fB\-include\fR \fIfile\fR \fB\-imacros\fR \fIfile\fR \&\fB\-iprefix\fR \fIfile\fR \fB\-iwithprefix\fR \fIdir\fR \&\fB\-iwithprefixbefore\fR \fIdir\fR \fB\-isystem\fR \fIdir\fR -\&\fB\-M \-MM \-MF \-MG \-MP \-MQ \-MT \-nostdinc \-P \-remap -\&\-trigraphs \-undef \-U\fR\fImacro\fR \fB\-Wp,\fR\fIoption\fR -.Ip "\fIAssembler Option\fR" 4 +\&\fB\-imultilib\fR \fIdir\fR \fB\-isysroot\fR \fIdir\fR +\&\fB\-M \-MM \-MF \-MG \-MP \-MQ \-MT \-nostdinc +\&\-P \-fworking\-directory \-remap +\&\-trigraphs \-undef \-U\fR\fImacro\fR \fB\-Wp,\fR\fIoption\fR +\&\fB\-Xpreprocessor\fR \fIoption\fR +.IP "\fIAssembler Option\fR" 4 .IX Item "Assembler Option" -\&\fB\-Wa,\fR\fIoption\fR -.Ip "\fILinker Options\fR" 4 +\&\fB\-Wa,\fR\fIoption\fR \fB\-Xassembler\fR \fIoption\fR +.IP "\fILinker Options\fR" 4 .IX Item "Linker Options" -\&\fB -\&\fR\fIobject-file-name\fR \fB\-l\fR\fIlibrary\fR -\&\fB\-nostartfiles \-nodefaultlibs \-nostdlib -\&\-s \-static \-static-libgcc \-shared \-shared-libgcc \-symbolic -\&\-Wl,\fR\fIoption\fR \fB\-Xlinker\fR \fIoption\fR +\&\fIobject-file-name\fR \fB\-l\fR\fIlibrary\fR +\&\fB\-nostartfiles \-nodefaultlibs \-nostdlib \-pie \-rdynamic +\&\-s \-static \-static\-libgcc \-shared \-shared\-libgcc \-symbolic +\&\-T\fR \fIscript\fR \fB\-Wl,\fR\fIoption\fR \fB\-Xlinker\fR \fIoption\fR \&\fB\-u\fR \fIsymbol\fR -.Ip "\fIDirectory Options\fR" 4 +.IP "\fIDirectory Options\fR" 4 .IX Item "Directory Options" -\&\fB\-B\fR\fIprefix\fR \fB\-I\fR\fIdir\fR \fB\-I- \-L\fR\fIdir\fR \fB\-specs=\fR\fIfile\fR -.Ip "\fITarget Options\fR" 4 +\&\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 +.IP "\fITarget Options\fR" 4 .IX Item "Target Options" -\&\fB\-b\fR \fImachine\fR \fB\-V\fR \fIversion\fR -.Ip "\fIMachine Dependent Options\fR" 4 +\&\fB\-V\fR \fIversion\fR \fB\-b\fR \fImachine\fR +.IP "\fIMachine Dependent Options\fR" 4 .IX Item "Machine Dependent Options" -\&\fIM680x0 Options\fR -.Sp -\&\fB\-m68000 \-m68020 \-m68020\-40 \-m68020\-60 \-m68030 \-m68040 -\&\-m68060 \-mcpu32 \-m5200 \-m68881 \-mbitfield \-mc68000 \-mc68020 -\&\-mfpa \-mnobitfield \-mrtd \-mshort \-msoft-float \-mpcrel -\&\-malign-int \-mstrict-align\fR -.Sp -\&\fIM68hc1x Options\fR -.Sp -\&\fB\-m6811 \-m6812 \-m68hc11 \-m68hc12 -\&\-mauto-incdec \-mshort \-msoft-reg-count=\fR\fIcount\fR -.Sp -\&\fI\s-1VAX\s0 Options\fR -.Sp -\&\fB\-mg \-mgnu \-munix\fR -.Sp -\&\fI\s-1SPARC\s0 Options\fR -.Sp -\&\fB\-mcpu=\fR\fIcpu-type\fR -\&\fB\-mtune=\fR\fIcpu-type\fR -\&\fB\-mcmodel=\fR\fIcode-model\fR -\&\fB\-m32 \-m64 -\&\-mapp-regs \-mbroken-saverestore \-mcypress -\&\-mfaster-structs \-mflat -\&\-mfpu \-mhard-float \-mhard-quad-float -\&\-mimpure-text \-mlive-g0 \-mno-app-regs -\&\-mno-faster-structs \-mno-flat \-mno-fpu -\&\-mno-impure-text \-mno-stack-bias \-mno-unaligned-doubles -\&\-msoft-float \-msoft-quad-float \-msparclite \-mstack-bias -\&\-msupersparc \-munaligned-doubles \-mv8\fR -.Sp -\&\fIConvex Options\fR -.Sp -\&\fB\-mc1 \-mc2 \-mc32 \-mc34 \-mc38 -\&\-margcount \-mnoargcount -\&\-mlong32 \-mlong64 -\&\-mvolatile-cache \-mvolatile-nocache\fR -.Sp -\&\fI\s-1AMD29K\s0 Options\fR -.Sp -\&\fB\-m29000 \-m29050 \-mbw \-mnbw \-mdw \-mndw -\&\-mlarge \-mnormal \-msmall -\&\-mkernel-registers \-mno-reuse-arg-regs -\&\-mno-stack-check \-mno-storem-bug -\&\-mreuse-arg-regs \-msoft-float \-mstack-check -\&\-mstorem-bug \-muser-registers\fR +\&\fI\s-1ARC\s0 Options\fR +\&\fB\-EB \-EL +\&\-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 .Sp \&\fI\s-1ARM\s0 Options\fR -.Sp -\&\fB\-mapcs-frame \-mno-apcs-frame -\&\-mapcs-26 \-mapcs-32 -\&\-mapcs-stack-check \-mno-apcs-stack-check -\&\-mapcs-float \-mno-apcs-float -\&\-mapcs-reentrant \-mno-apcs-reentrant -\&\-msched-prolog \-mno-sched-prolog -\&\-mlittle-endian \-mbig-endian \-mwords-little-endian -\&\-malignment-traps \-mno-alignment-traps -\&\-msoft-float \-mhard-float \-mfpe -\&\-mthumb-interwork \-mno-thumb-interwork -\&\-mcpu=\fR\fIname\fR \fB\-march=\fR\fIname\fR \fB\-mfpe=\fR\fIname\fR -\&\fB\-mstructure-size-boundary=\fR\fIn\fR -\&\fB\-mbsd \-mxopen \-mno-symrename -\&\-mabort-on-noreturn -\&\-mlong-calls \-mno-long-calls -\&\-msingle-pic-base \-mno-single-pic-base -\&\-mpic-register=\fR\fIreg\fR -\&\fB\-mnop-fun-dllimport -\&\-mpoke-function-name +\&\fB\-mapcs\-frame \-mno\-apcs\-frame +\&\-mabi=\fR\fIname\fR +\&\fB\-mapcs\-stack\-check \-mno\-apcs\-stack\-check +\&\-mapcs\-float \-mno\-apcs\-float +\&\-mapcs\-reentrant \-mno\-apcs\-reentrant +\&\-msched\-prolog \-mno\-sched\-prolog +\&\-mlittle\-endian \-mbig\-endian \-mwords\-little\-endian +\&\-mfloat\-abi=\fR\fIname\fR \fB\-msoft\-float \-mhard\-float \-mfpe +\&\-mthumb\-interwork \-mno\-thumb\-interwork +\&\-mcpu=\fR\fIname\fR \fB\-march=\fR\fIname\fR \fB\-mfpu=\fR\fIname\fR +\&\fB\-mstructure\-size\-boundary=\fR\fIn\fR +\&\fB\-mabort\-on\-noreturn +\&\-mlong\-calls \-mno\-long\-calls +\&\-msingle\-pic\-base \-mno\-single\-pic\-base +\&\-mpic\-register=\fR\fIreg\fR +\&\fB\-mnop\-fun\-dllimport +\&\-mcirrus\-fix\-invalid\-insns \-mno\-cirrus\-fix\-invalid\-insns +\&\-mpoke\-function\-name \&\-mthumb \-marm -\&\-mtpcs-frame \-mtpcs-leaf-frame -\&\-mcaller-super-interworking \-mcallee-super-interworking\fR -.Sp -\&\fI\s-1MN10200\s0 Options\fR -.Sp -\&\fB\-mrelax\fR -.Sp -\&\fI\s-1MN10300\s0 Options\fR -.Sp -\&\fB\-mmult-bug \-mno-mult-bug -\&\-mam33 \-mno-am33 -\&\-mno-crt0 \-mrelax\fR +\&\-mtpcs\-frame \-mtpcs\-leaf\-frame +\&\-mcaller\-super\-interworking \-mcallee\-super\-interworking +\&\-mtp=\fR\fIname\fR +\&\fB\-mword\-relocations +\&\-mfix\-cortex\-m3\-ldrd\fR .Sp -\&\fIM32R/D Options\fR -.Sp -\&\fB\-m32rx \-m32r \-mcode-model=\fR\fImodel-type\fR \fB\-msdata=\fR\fIsdata-type\fR -\&\fB\-G\fR \fInum\fR -.Sp -\&\fIM88K Options\fR -.Sp -\&\fB\-m88000 \-m88100 \-m88110 \-mbig-pic -\&\-mcheck-zero-division \-mhandle-large-shift -\&\-midentify-revision \-mno-check-zero-division -\&\-mno-ocs-debug-info \-mno-ocs-frame-position -\&\-mno-optimize-arg-area \-mno-serialize-volatile -\&\-mno-underscores \-mocs-debug-info -\&\-mocs-frame-position \-moptimize-arg-area -\&\-mserialize-volatile \-mshort-data-\fR\fInum\fR \fB\-msvr3 -\&\-msvr4 \-mtrap-large-shift \-muse-div-instruction -\&\-mversion-03.00 \-mwarn-passed-structs\fR -.Sp -\&\fI\s-1RS/6000\s0 and PowerPC Options\fR -.Sp -\&\fB\-mcpu=\fR\fIcpu-type\fR -\&\fB\-mtune=\fR\fIcpu-type\fR -\&\fB\-mpower \-mno-power \-mpower2 \-mno-power2 -\&\-mpowerpc \-mpowerpc64 \-mno-powerpc -\&\-maltivec \-mno-altivec -\&\-mpowerpc-gpopt \-mno-powerpc-gpopt -\&\-mpowerpc-gfxopt \-mno-powerpc-gfxopt -\&\-mnew-mnemonics \-mold-mnemonics -\&\-mfull-toc \-mminimal-toc \-mno-fp-in-toc \-mno-sum-in-toc -\&\-m64 \-m32 \-mxl-call \-mno-xl-call \-mpe -\&\-msoft-float \-mhard-float \-mmultiple \-mno-multiple -\&\-mstring \-mno-string \-mupdate \-mno-update -\&\-mfused-madd \-mno-fused-madd \-mbit-align \-mno-bit-align -\&\-mstrict-align \-mno-strict-align \-mrelocatable -\&\-mno-relocatable \-mrelocatable-lib \-mno-relocatable-lib -\&\-mtoc \-mno-toc \-mlittle \-mlittle-endian \-mbig \-mbig-endian -\&\-mcall-aix \-mcall-sysv \-mcall-netbsd -\&\-maix-struct-return \-msvr4\-struct-return -\&\-mabi=altivec \-mabi=no-altivec -\&\-mprototype \-mno-prototype -\&\-msim \-mmvme \-mads \-myellowknife \-memb \-msdata -\&\-msdata=\fR\fIopt\fR \fB\-mvxworks \-G\fR \fInum\fR \fB\-pthread\fR -.Sp -\&\fI\s-1RT\s0 Options\fR -.Sp -\&\fB\-mcall-lib-mul \-mfp-arg-in-fpregs \-mfp-arg-in-gregs -\&\-mfull-fp-blocks \-mhc-struct-return \-min-line-mul -\&\-mminimum-fp-blocks \-mnohc-struct-return\fR -.Sp -\&\fI\s-1MIPS\s0 Options\fR -.Sp -\&\fB\-mabicalls \-march=\fR\fIcpu-type\fR \fB\-mtune=\fR\fIcpu=type\fR -\&\fB\-mcpu=\fR\fIcpu-type\fR \fB\-membedded-data \-muninit-const-in-rodata -\&\-membedded-pic \-mfp32 \-mfp64 \-mfused-madd \-mno-fused-madd -\&\-mgas \-mgp32 \-mgp64 -\&\-mgpopt \-mhalf-pic \-mhard-float \-mint64 \-mips1 -\&\-mips2 \-mips3 \-mips4 \-mlong64 \-mlong32 \-mlong-calls \-mmemcpy -\&\-mmips-as \-mmips-tfile \-mno-abicalls -\&\-mno-embedded-data \-mno-uninit-const-in-rodata -\&\-mno-embedded-pic \-mno-gpopt \-mno-long-calls -\&\-mno-memcpy \-mno-mips-tfile \-mno-rnames \-mno-stats -\&\-mrnames \-msoft-float -\&\-m4650 \-msingle-float \-mmad -\&\-mstats \-EL \-EB \-G\fR \fInum\fR \fB\-nocpp -\&\-mabi=32 \-mabi=n32 \-mabi=64 \-mabi=eabi -\&\-mfix7000 \-mno-crt0 \-mflush-func=\fR\fIfunc\fR \fB\-mno-flush-func\fR -.Sp -\&\fIi386 and x86\-64 Options\fR -.Sp -\&\fB\-mcpu=\fR\fIcpu-type\fR \fB\-march=\fR\fIcpu-type\fR \fB\-mfpmath=\fR\fIunit\fR -\&\fB\-masm=\fR\fIdialect\fR \fB\-mno-fancy-math-387 -\&\-mno-fp-ret-in-387 \-msoft-float \-msvr3\-shlib -\&\-mno-wide-multiply \-mrtd \-malign-double -\&\-mpreferred-stack-boundary=\fR\fInum\fR -\&\fB\-mmmx \-msse \-msse2 \-m3dnow -\&\-mthreads \-mno-align-stringops \-minline-all-stringops -\&\-mpush-args \-maccumulate-outgoing-args \-m128bit-long-double -\&\-m96bit-long-double \-mregparm=\fR\fInum\fR \fB\-momit-leaf-frame-pointer -\&\-mno-red-zone -\&\-mcmodel=\fR\fIcode-model\fR -\&\fB\-m32 \-m64\fR -.Sp -\&\fI\s-1HPPA\s0 Options\fR +\&\fI\s-1AVR\s0 Options\fR +\&\fB\-mmcu=\fR\fImcu\fR \fB\-msize \-mno\-interrupts +\&\-mcall\-prologues \-mno\-tablejump \-mtiny\-stack \-mint8\fR +.Sp +\&\fIBlackfin Options\fR +\&\fB\-mcpu=\fR\fIcpu\fR[\fB\-\fR\fIsirevision\fR] +\&\fB\-msim \-momit\-leaf\-frame\-pointer \-mno\-omit\-leaf\-frame\-pointer +\&\-mspecld\-anomaly \-mno\-specld\-anomaly \-mcsync\-anomaly \-mno\-csync\-anomaly +\&\-mlow\-64k \-mno\-low64k \-mstack\-check\-l1 \-mid\-shared\-library +\&\-mno\-id\-shared\-library \-mshared\-library\-id=\fR\fIn\fR +\&\fB\-mleaf\-id\-shared\-library \-mno\-leaf\-id\-shared\-library +\&\-msep\-data \-mno\-sep\-data \-mlong\-calls \-mno\-long\-calls +\&\-mfast\-fp \-minline\-plt \-mmulticore \-mcorea \-mcoreb \-msdram +\&\-micplb\fR .Sp -\&\fB\-march=\fR\fIarchitecture-type\fR -\&\fB\-mbig-switch \-mdisable-fpregs \-mdisable-indexing -\&\-mfast-indirect-calls \-mgas \-mjump-in-delay -\&\-mlong-load-store \-mno-big-switch \-mno-disable-fpregs -\&\-mno-disable-indexing \-mno-fast-indirect-calls \-mno-gas -\&\-mno-jump-in-delay \-mno-long-load-store -\&\-mno-portable-runtime \-mno-soft-float -\&\-mno-space-regs \-msoft-float \-mpa-risc-1\-0 -\&\-mpa-risc-1\-1 \-mpa-risc-2\-0 \-mportable-runtime -\&\-mschedule=\fR\fIcpu-type\fR \fB\-mspace-regs\fR -.Sp -\&\fIIntel 960 Options\fR -.Sp -\&\fB\-m\fR\fIcpu-type\fR \fB\-masm-compat \-mclean-linkage -\&\-mcode-align \-mcomplex-addr \-mleaf-procedures -\&\-mic-compat \-mic2.0\-compat \-mic3.0\-compat -\&\-mintel-asm \-mno-clean-linkage \-mno-code-align -\&\-mno-complex-addr \-mno-leaf-procedures -\&\-mno-old-align \-mno-strict-align \-mno-tail-call -\&\-mnumerics \-mold-align \-msoft-float \-mstrict-align -\&\-mtail-call\fR +\&\fI\s-1CRIS\s0 Options\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\-metrax4 \-metrax100 \-mpdebug \-mcc\-init \-mno\-side\-effects +\&\-mstack\-align \-mdata\-align \-mconst\-align +\&\-m32\-bit \-m16\-bit \-m8\-bit \-mno\-prologue\-epilogue \-mno\-gotplt +\&\-melf \-maout \-melinux \-mlinux \-sim \-sim2 +\&\-mmul\-bug\-workaround \-mno\-mul\-bug\-workaround\fR +.Sp +\&\fI\s-1CRX\s0 Options\fR +\&\fB\-mmac \-mpush\-args\fR +.Sp +\&\fIDarwin Options\fR +\&\fB\-all_load \-allowable_client \-arch \-arch_errors_fatal +\&\-arch_only \-bind_at_load \-bundle \-bundle_loader +\&\-client_name \-compatibility_version \-current_version +\&\-dead_strip +\&\-dependency\-file \-dylib_file \-dylinker_install_name +\&\-dynamic \-dynamiclib \-exported_symbols_list +\&\-filelist \-flat_namespace \-force_cpusubtype_ALL +\&\-force_flat_namespace \-headerpad_max_install_names +\&\-iframework +\&\-image_base \-init \-install_name \-keep_private_externs +\&\-multi_module \-multiply_defined \-multiply_defined_unused +\&\-noall_load \-no_dead_strip_inits_and_terms +\&\-nofixprebinding \-nomultidefs \-noprebind \-noseglinkedit +\&\-pagezero_size \-prebind \-prebind_all_twolevel_modules +\&\-private_bundle \-read_only_relocs \-sectalign +\&\-sectobjectsymbols \-whyload \-seg1addr +\&\-sectcreate \-sectobjectsymbols \-sectorder +\&\-segaddr \-segs_read_only_addr \-segs_read_write_addr +\&\-seg_addr_table \-seg_addr_table_filename \-seglinkedit +\&\-segprot \-segs_read_only_addr \-segs_read_write_addr +\&\-single_module \-static \-sub_library \-sub_umbrella +\&\-twolevel_namespace \-umbrella \-undefined +\&\-unexported_symbols_list \-weak_reference_mismatches +\&\-whatsloaded \-F \-gused \-gfull \-mmacosx\-version\-min=\fR\fIversion\fR +\&\fB\-mkernel \-mone\-byte\-bool\fR .Sp \&\fI\s-1DEC\s0 Alpha Options\fR -.Sp -\&\fB\-mno-fp-regs \-msoft-float \-malpha-as \-mgas -\&\-mieee \-mieee-with-inexact \-mieee-conformant -\&\-mfp-trap-mode=\fR\fImode\fR \fB\-mfp-rounding-mode=\fR\fImode\fR -\&\fB\-mtrap-precision=\fR\fImode\fR \fB\-mbuild-constants +\&\fB\-mno\-fp\-regs \-msoft\-float \-malpha\-as \-mgas +\&\-mieee \-mieee\-with\-inexact \-mieee\-conformant +\&\-mfp\-trap\-mode=\fR\fImode\fR \fB\-mfp\-rounding\-mode=\fR\fImode\fR +\&\fB\-mtrap\-precision=\fR\fImode\fR \fB\-mbuild\-constants \&\-mcpu=\fR\fIcpu-type\fR \fB\-mtune=\fR\fIcpu-type\fR \&\fB\-mbwx \-mmax \-mfix \-mcix -\&\-mfloat-vax \-mfloat-ieee -\&\-mexplicit-relocs \-msmall-data \-mlarge-data -\&\-mmemory-latency=\fR\fItime\fR +\&\-mfloat\-vax \-mfloat\-ieee +\&\-mexplicit\-relocs \-msmall\-data \-mlarge\-data +\&\-msmall\-text \-mlarge\-text +\&\-mmemory\-latency=\fR\fItime\fR .Sp \&\fI\s-1DEC\s0 Alpha/VMS Options\fR -.Sp -\&\fB\-mvms-return-codes\fR -.Sp -\&\fIClipper Options\fR -.Sp -\&\fB\-mc300 \-mc400\fR +\&\fB\-mvms\-return\-codes\fR +.Sp +\&\fI\s-1FR30\s0 Options\fR +\&\fB\-msmall\-model \-mno\-lsim\fR +.Sp +\&\fI\s-1FRV\s0 Options\fR +\&\fB\-mgpr\-32 \-mgpr\-64 \-mfpr\-32 \-mfpr\-64 +\&\-mhard\-float \-msoft\-float +\&\-malloc\-cc \-mfixed\-cc \-mdword \-mno\-dword +\&\-mdouble \-mno\-double +\&\-mmedia \-mno\-media \-mmuladd \-mno\-muladd +\&\-mfdpic \-minline\-plt \-mgprel\-ro \-multilib\-library\-pic +\&\-mlinked\-fp \-mlong\-calls \-malign\-labels +\&\-mlibrary\-pic \-macc\-4 \-macc\-8 +\&\-mpack \-mno\-pack \-mno\-eflags \-mcond\-move \-mno\-cond\-move +\&\-moptimize\-membar \-mno\-optimize\-membar +\&\-mscc \-mno\-scc \-mcond\-exec \-mno\-cond\-exec +\&\-mvliw\-branch \-mno\-vliw\-branch +\&\-mmulti\-cond\-exec \-mno\-multi\-cond\-exec \-mnested\-cond\-exec +\&\-mno\-nested\-cond\-exec \-mtomcat\-stats +\&\-mTLS \-mtls +\&\-mcpu=\fR\fIcpu\fR +.Sp +\&\fIGNU/Linux Options\fR +\&\fB\-muclibc\fR .Sp \&\fIH8/300 Options\fR +\&\fB\-mrelax \-mh \-ms \-mn \-mint32 \-malign\-300\fR .Sp -\&\fB\-mrelax \-mh \-ms \-mint32 \-malign-300\fR -.Sp -\&\fI\s-1SH\s0 Options\fR -.Sp -\&\fB\-m1 \-m2 \-m3 \-m3e -\&\-m4\-nofpu \-m4\-single-only \-m4\-single \-m4 -\&\-m5\-64media \-m5\-64media-nofpu -\&\-m5\-32media \-m5\-32media-nofpu -\&\-m5\-compact \-m5\-compact-nofpu -\&\-mb \-ml \-mdalign \-mrelax -\&\-mbigtable \-mfmovd \-mhitachi \-mnomacsave -\&\-mieee \-misize \-mpadstruct \-mspace -\&\-mprefergot \-musermode\fR -.Sp -\&\fISystem V Options\fR -.Sp -\&\fB\-Qy \-Qn \-YP,\fR\fIpaths\fR \fB\-Ym,\fR\fIdir\fR -.Sp -\&\fI\s-1ARC\s0 Options\fR -.Sp -\&\fB\-EB \-EL -\&\-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 -.Sp -\&\fITMS320C3x/C4x Options\fR -.Sp -\&\fB\-mcpu=\fR\fIcpu\fR \fB\-mbig \-msmall \-mregparm \-mmemparm -\&\-mfast-fix \-mmpyi \-mbk \-mti \-mdp-isr-reload -\&\-mrpts=\fR\fIcount\fR \fB\-mrptb \-mdb \-mloop-unsigned -\&\-mparallel-insns \-mparallel-mpy \-mpreserve-float\fR -.Sp -\&\fIV850 Options\fR +\&\fI\s-1HPPA\s0 Options\fR +\&\fB\-march=\fR\fIarchitecture-type\fR +\&\fB\-mbig\-switch \-mdisable\-fpregs \-mdisable\-indexing +\&\-mfast\-indirect\-calls \-mgas \-mgnu\-ld \-mhp\-ld +\&\-mfixed\-range=\fR\fIregister-range\fR +\&\fB\-mjump\-in\-delay \-mlinker\-opt \-mlong\-calls +\&\-mlong\-load\-store \-mno\-big\-switch \-mno\-disable\-fpregs +\&\-mno\-disable\-indexing \-mno\-fast\-indirect\-calls \-mno\-gas +\&\-mno\-jump\-in\-delay \-mno\-long\-load\-store +\&\-mno\-portable\-runtime \-mno\-soft\-float +\&\-mno\-space\-regs \-msoft\-float \-mpa\-risc\-1\-0 +\&\-mpa\-risc\-1\-1 \-mpa\-risc\-2\-0 \-mportable\-runtime +\&\-mschedule=\fR\fIcpu-type\fR \fB\-mspace\-regs \-msio \-mwsio +\&\-munix=\fR\fIunix-std\fR \fB\-nolibdld \-static \-threads\fR .Sp -\&\fB\-mlong-calls \-mno-long-calls \-mep \-mno-ep -\&\-mprolog-function \-mno-prolog-function \-mspace -\&\-mtda=\fR\fIn\fR \fB\-msda=\fR\fIn\fR \fB\-mzda=\fR\fIn\fR -\&\fB\-mv850 \-mbig-switch\fR +\&\fIi386 and x86\-64 Options\fR +\&\fB\-mtune=\fR\fIcpu-type\fR \fB\-march=\fR\fIcpu-type\fR +\&\fB\-mfpmath=\fR\fIunit\fR +\&\fB\-masm=\fR\fIdialect\fR \fB\-mno\-fancy\-math\-387 +\&\-mno\-fp\-ret\-in\-387 \-msoft\-float +\&\-mno\-wide\-multiply \-mrtd \-malign\-double +\&\-mpreferred\-stack\-boundary=\fR\fInum\fR +\&\fB\-mincoming\-stack\-boundary=\fR\fInum\fR +\&\fB\-mcld \-mcx16 \-msahf \-mrecip +\&\-mmmx \-msse \-msse2 \-msse3 \-mssse3 \-msse4.1 \-msse4.2 \-msse4 \-mavx +\&\-maes \-mpclmul +\&\-msse4a \-m3dnow \-mpopcnt \-mabm \-msse5 +\&\-mthreads \-mno\-align\-stringops \-minline\-all\-stringops +\&\-minline\-stringops\-dynamically \-mstringop\-strategy=\fR\fIalg\fR +\&\fB\-mpush\-args \-maccumulate\-outgoing\-args \-m128bit\-long\-double +\&\-m96bit\-long\-double \-mregparm=\fR\fInum\fR \fB\-msseregparm +\&\-mveclibabi=\fR\fItype\fR \fB\-mpc32 \-mpc64 \-mpc80 \-mstackrealign +\&\-momit\-leaf\-frame\-pointer \-mno\-red\-zone \-mno\-tls\-direct\-seg\-refs +\&\-mcmodel=\fR\fIcode-model\fR +\&\fB\-m32 \-m64 \-mlarge\-data\-threshold=\fR\fInum\fR +\&\fB\-mfused\-madd \-mno\-fused\-madd \-msse2avx\fR +.Sp +\&\fI\s-1IA\-64\s0 Options\fR +\&\fB\-mbig\-endian \-mlittle\-endian \-mgnu\-as \-mgnu\-ld \-mno\-pic +\&\-mvolatile\-asm\-stop \-mregister\-names \-mno\-sdata +\&\-mconstant\-gp \-mauto\-pic \-minline\-float\-divide\-min\-latency +\&\-minline\-float\-divide\-max\-throughput +\&\-minline\-int\-divide\-min\-latency +\&\-minline\-int\-divide\-max\-throughput +\&\-minline\-sqrt\-min\-latency \-minline\-sqrt\-max\-throughput +\&\-mno\-dwarf2\-asm \-mearly\-stop\-bits +\&\-mfixed\-range=\fR\fIregister-range\fR \fB\-mtls\-size=\fR\fItls-size\fR +\&\fB\-mtune=\fR\fIcpu-type\fR \fB\-mt \-pthread \-milp32 \-mlp64 +\&\-mno\-sched\-br\-data\-spec \-msched\-ar\-data\-spec \-mno\-sched\-control\-spec +\&\-msched\-br\-in\-data\-spec \-msched\-ar\-in\-data\-spec \-msched\-in\-control\-spec +\&\-msched\-ldc \-mno\-sched\-control\-ldc \-mno\-sched\-spec\-verbose +\&\-mno\-sched\-prefer\-non\-data\-spec\-insns +\&\-mno\-sched\-prefer\-non\-control\-spec\-insns +\&\-mno\-sched\-count\-spec\-in\-critical\-path\fR .Sp -\&\fI\s-1NS32K\s0 Options\fR +\&\fIM32R/D Options\fR +\&\fB\-m32r2 \-m32rx \-m32r +\&\-mdebug +\&\-malign\-loops \-mno\-align\-loops +\&\-missue\-rate=\fR\fInumber\fR +\&\fB\-mbranch\-cost=\fR\fInumber\fR +\&\fB\-mmodel=\fR\fIcode-size-model-type\fR +\&\fB\-msdata=\fR\fIsdata-type\fR +\&\fB\-mno\-flush\-func \-mflush\-func=\fR\fIname\fR +\&\fB\-mno\-flush\-trap \-mflush\-trap=\fR\fInumber\fR +\&\fB\-G\fR \fInum\fR .Sp -\&\fB\-m32032 \-m32332 \-m32532 \-m32081 \-m32381 -\&\-mmult-add \-mnomult-add \-msoft-float \-mrtd \-mnortd -\&\-mregparam \-mnoregparam \-msb \-mnosb -\&\-mbitfield \-mnobitfield \-mhimem \-mnohimem\fR +\&\fIM32C Options\fR +\&\fB\-mcpu=\fR\fIcpu\fR \fB\-msim \-memregs=\fR\fInumber\fR .Sp -\&\fI\s-1AVR\s0 Options\fR +\&\fIM680x0 Options\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 +\&\-m68060 \-mcpu32 \-m5200 \-m5206e \-m528x \-m5307 \-m5407 +\&\-mcfv4e \-mbitfield \-mno\-bitfield \-mc68000 \-mc68020 +\&\-mnobitfield \-mrtd \-mno\-rtd \-mdiv \-mno\-div \-mshort +\&\-mno\-short \-mhard\-float \-m68881 \-msoft\-float \-mpcrel +\&\-malign\-int \-mstrict\-align \-msep\-data \-mno\-sep\-data +\&\-mshared\-library\-id=n \-mid\-shared\-library \-mno\-id\-shared\-library +\&\-mxgot \-mno\-xgot\fR .Sp -\&\fB\-mmcu=\fR\fImcu\fR \fB\-msize \-minit-stack=\fR\fIn\fR \fB\-mno-interrupts -\&\-mcall-prologues \-mno-tablejump \-mtiny-stack\fR +\&\fIM68hc1x Options\fR +\&\fB\-m6811 \-m6812 \-m68hc11 \-m68hc12 \-m68hcs12 +\&\-mauto\-incdec \-minmax \-mlong\-calls \-mshort +\&\-msoft\-reg\-count=\fR\fIcount\fR .Sp \&\fIMCore Options\fR +\&\fB\-mhardlit \-mno\-hardlit \-mdiv \-mno\-div \-mrelax\-immediates +\&\-mno\-relax\-immediates \-mwide\-bitfields \-mno\-wide\-bitfields +\&\-m4byte\-functions \-mno\-4byte\-functions \-mcallgraph\-data +\&\-mno\-callgraph\-data \-mslow\-bytes \-mno\-slow\-bytes \-mno\-lsim +\&\-mlittle\-endian \-mbig\-endian \-m210 \-m340 \-mstack\-increment\fR .Sp -\&\fB\-mhardlit \-mno-hardlit \-mdiv \-mno-div \-mrelax-immediates -\&\-mno-relax-immediates \-mwide-bitfields \-mno-wide-bitfields -\&\-m4byte-functions \-mno-4byte-functions \-mcallgraph-data -\&\-mno-callgraph-data \-mslow-bytes \-mno-slow-bytes \-mno-lsim -\&\-mlittle-endian \-mbig-endian \-m210 \-m340 \-mstack-increment\fR +\&\fI\s-1MIPS\s0 Options\fR +\&\fB\-EL \-EB \-march=\fR\fIarch\fR \fB\-mtune=\fR\fIarch\fR +\&\fB\-mips1 \-mips2 \-mips3 \-mips4 \-mips32 \-mips32r2 +\&\-mips64 \-mips64r2 +\&\-mips16 \-mno\-mips16 \-mflip\-mips16 +\&\-minterlink\-mips16 \-mno\-interlink\-mips16 +\&\-mabi=\fR\fIabi\fR \fB\-mabicalls \-mno\-abicalls +\&\-mshared \-mno\-shared \-mplt \-mno\-plt \-mxgot \-mno\-xgot +\&\-mgp32 \-mgp64 \-mfp32 \-mfp64 \-mhard\-float \-msoft\-float +\&\-msingle\-float \-mdouble\-float \-mdsp \-mno\-dsp \-mdspr2 \-mno\-dspr2 +\&\-mfpu=\fR\fIfpu-type\fR +\&\fB\-msmartmips \-mno\-smartmips +\&\-mpaired\-single \-mno\-paired\-single \-mdmx \-mno\-mdmx +\&\-mips3d \-mno\-mips3d \-mmt \-mno\-mt \-mllsc \-mno\-llsc +\&\-mlong64 \-mlong32 \-msym32 \-mno\-sym32 +\&\-G\fR\fInum\fR \fB\-mlocal\-sdata \-mno\-local\-sdata +\&\-mextern\-sdata \-mno\-extern\-sdata \-mgpopt \-mno\-gopt +\&\-membedded\-data \-mno\-embedded\-data +\&\-muninit\-const\-in\-rodata \-mno\-uninit\-const\-in\-rodata +\&\-mcode\-readable=\fR\fIsetting\fR +\&\fB\-msplit\-addresses \-mno\-split\-addresses +\&\-mexplicit\-relocs \-mno\-explicit\-relocs +\&\-mcheck\-zero\-division \-mno\-check\-zero\-division +\&\-mdivide\-traps \-mdivide\-breaks +\&\-mmemcpy \-mno\-memcpy \-mlong\-calls \-mno\-long\-calls +\&\-mmad \-mno\-mad \-mfused\-madd \-mno\-fused\-madd \-nocpp +\&\-mfix\-r4000 \-mno\-fix\-r4000 \-mfix\-r4400 \-mno\-fix\-r4400 +\&\-mfix\-r10000 \-mno\-fix\-r10000 \-mfix\-vr4120 \-mno\-fix\-vr4120 +\&\-mfix\-vr4130 \-mno\-fix\-vr4130 \-mfix\-sb1 \-mno\-fix\-sb1 +\&\-mflush\-func=\fR\fIfunc\fR \fB\-mno\-flush\-func +\&\-mbranch\-cost=\fR\fInum\fR \fB\-mbranch\-likely \-mno\-branch\-likely +\&\-mfp\-exceptions \-mno\-fp\-exceptions +\&\-mvr4130\-align \-mno\-vr4130\-align\fR .Sp \&\fI\s-1MMIX\s0 Options\fR +\&\fB\-mlibfuncs \-mno\-libfuncs \-mepsilon \-mno\-epsilon \-mabi=gnu +\&\-mabi=mmixware \-mzero\-extend \-mknuthdiv \-mtoplevel\-symbols +\&\-melf \-mbranch\-predict \-mno\-branch\-predict \-mbase\-addresses +\&\-mno\-base\-addresses \-msingle\-exit \-mno\-single\-exit\fR .Sp -\&\fB\-mlibfuncs \-mno-libfuncs \-mepsilon \-mno-epsilon \-mabi=gnu -\&\-mabi=mmixware \-mzero-extend \-mknuthdiv \-mtoplevel-symbols -\&\-melf \-mbranch-predict \-mno-branch-predict \-mbase-addresses -\&\-mno-base-addresses\fR +\&\fI\s-1MN10300\s0 Options\fR +\&\fB\-mmult\-bug \-mno\-mult\-bug +\&\-mam33 \-mno\-am33 +\&\-mam33\-2 \-mno\-am33\-2 +\&\-mreturn\-pointer\-on\-d0 +\&\-mno\-crt0 \-mrelax\fR +.Sp +\&\fI\s-1PDP\-11\s0 Options\fR +\&\fB\-mfpu \-msoft\-float \-mac0 \-mno\-ac0 \-m40 \-m45 \-m10 +\&\-mbcopy \-mbcopy\-builtin \-mint32 \-mno\-int16 +\&\-mint16 \-mno\-int32 \-mfloat32 \-mno\-float64 +\&\-mfloat64 \-mno\-float32 \-mabshi \-mno\-abshi +\&\-mbranch\-expensive \-mbranch\-cheap +\&\-msplit \-mno\-split \-munix\-asm \-mdec\-asm\fR +.Sp +\&\fIpicoChip Options\fR +\&\fB\-mae=\fR\fIae_type\fR \fB\-mvliw\-lookahead=\fR\fIN\fR +\&\fB\-msymbol\-as\-address \-mno\-inefficient\-warnings\fR +.Sp +\&\fIPowerPC Options\fR +See \s-1RS/6000\s0 and PowerPC Options. .Sp -\&\fI\s-1IA-64\s0 Options\fR +\&\fI\s-1RS/6000\s0 and PowerPC Options\fR +\&\fB\-mcpu=\fR\fIcpu-type\fR +\&\fB\-mtune=\fR\fIcpu-type\fR +\&\fB\-mpower \-mno\-power \-mpower2 \-mno\-power2 +\&\-mpowerpc \-mpowerpc64 \-mno\-powerpc +\&\-maltivec \-mno\-altivec +\&\-mpowerpc\-gpopt \-mno\-powerpc\-gpopt +\&\-mpowerpc\-gfxopt \-mno\-powerpc\-gfxopt +\&\-mmfcrf \-mno\-mfcrf \-mpopcntb \-mno\-popcntb \-mfprnd \-mno\-fprnd +\&\-mcmpb \-mno\-cmpb \-mmfpgpr \-mno\-mfpgpr \-mhard\-dfp \-mno\-hard\-dfp +\&\-mnew\-mnemonics \-mold\-mnemonics +\&\-mfull\-toc \-mminimal\-toc \-mno\-fp\-in\-toc \-mno\-sum\-in\-toc +\&\-m64 \-m32 \-mxl\-compat \-mno\-xl\-compat \-mpe +\&\-malign\-power \-malign\-natural +\&\-msoft\-float \-mhard\-float \-mmultiple \-mno\-multiple +\&\-msingle\-float \-mdouble\-float \-msimple\-fpu +\&\-mstring \-mno\-string \-mupdate \-mno\-update +\&\-mavoid\-indexed\-addresses \-mno\-avoid\-indexed\-addresses +\&\-mfused\-madd \-mno\-fused\-madd \-mbit\-align \-mno\-bit\-align +\&\-mstrict\-align \-mno\-strict\-align \-mrelocatable +\&\-mno\-relocatable \-mrelocatable\-lib \-mno\-relocatable\-lib +\&\-mtoc \-mno\-toc \-mlittle \-mlittle\-endian \-mbig \-mbig\-endian +\&\-mdynamic\-no\-pic \-maltivec \-mswdiv +\&\-mprioritize\-restricted\-insns=\fR\fIpriority\fR +\&\fB\-msched\-costly\-dep=\fR\fIdependence_type\fR +\&\fB\-minsert\-sched\-nops=\fR\fIscheme\fR +\&\fB\-mcall\-sysv \-mcall\-netbsd +\&\-maix\-struct\-return \-msvr4\-struct\-return +\&\-mabi=\fR\fIabi-type\fR \fB\-msecure\-plt \-mbss\-plt +\&\-misel \-mno\-isel +\&\-misel=yes \-misel=no +\&\-mspe \-mno\-spe +\&\-mspe=yes \-mspe=no +\&\-mpaired +\&\-mgen\-cell\-microcode \-mwarn\-cell\-microcode +\&\-mvrsave \-mno\-vrsave +\&\-mmulhw \-mno\-mulhw +\&\-mdlmzb \-mno\-dlmzb +\&\-mfloat\-gprs=yes \-mfloat\-gprs=no \-mfloat\-gprs=single \-mfloat\-gprs=double +\&\-mprototype \-mno\-prototype +\&\-msim \-mmvme \-mads \-myellowknife \-memb \-msdata +\&\-msdata=\fR\fIopt\fR \fB\-mvxworks \-G\fR \fInum\fR \fB\-pthread\fR .Sp -\&\fB\-mbig-endian \-mlittle-endian \-mgnu-as \-mgnu-ld \-mno-pic -\&\-mvolatile-asm-stop \-mb-step \-mregister-names \-mno-sdata -\&\-mconstant-gp \-mauto-pic \-minline-divide-min-latency -\&\-minline-divide-max-throughput \-mno-dwarf2\-asm -\&\-mfixed-range=\fR\fIregister-range\fR +\&\fIS/390 and zSeries Options\fR +\&\fB\-mtune=\fR\fIcpu-type\fR \fB\-march=\fR\fIcpu-type\fR +\&\fB\-mhard\-float \-msoft\-float \-mhard\-dfp \-mno\-hard\-dfp +\&\-mlong\-double\-64 \-mlong\-double\-128 +\&\-mbackchain \-mno\-backchain \-mpacked\-stack \-mno\-packed\-stack +\&\-msmall\-exec \-mno\-small\-exec \-mmvcle \-mno\-mvcle +\&\-m64 \-m31 \-mdebug \-mno\-debug \-mesa \-mzarch +\&\-mtpf\-trace \-mno\-tpf\-trace \-mfused\-madd \-mno\-fused\-madd +\&\-mwarn\-framesize \-mwarn\-dynamicstack \-mstack\-size \-mstack\-guard\fR +.Sp +\&\fIScore Options\fR +\&\fB\-meb \-mel +\&\-mnhwloop +\&\-muls +\&\-mmac +\&\-mscore5 \-mscore5u \-mscore7 \-mscore7d\fR .Sp -\&\fID30V Options\fR +\&\fI\s-1SH\s0 Options\fR +\&\fB\-m1 \-m2 \-m2e \-m3 \-m3e +\&\-m4\-nofpu \-m4\-single\-only \-m4\-single \-m4 +\&\-m4a\-nofpu \-m4a\-single\-only \-m4a\-single \-m4a \-m4al +\&\-m5\-64media \-m5\-64media\-nofpu +\&\-m5\-32media \-m5\-32media\-nofpu +\&\-m5\-compact \-m5\-compact\-nofpu +\&\-mb \-ml \-mdalign \-mrelax +\&\-mbigtable \-mfmovd \-mhitachi \-mrenesas \-mno\-renesas \-mnomacsave +\&\-mieee \-mbitops \-misize \-minline\-ic_invalidate \-mpadstruct \-mspace +\&\-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\-madjust\-unroll \-mindexed\-addressing \-mgettrcost=\fR\fInumber\fR \fB\-mpt\-fixed +\&\-minvalid\-symbols\fR .Sp -\&\fB\-mextmem \-mextmemory \-monchip \-mno-asm-optimize -\&\-masm-optimize \-mbranch-cost=\fR\fIn\fR \fB\-mcond-exec=\fR\fIn\fR +\&\fI\s-1SPARC\s0 Options\fR +\&\fB\-mcpu=\fR\fIcpu-type\fR +\&\fB\-mtune=\fR\fIcpu-type\fR +\&\fB\-mcmodel=\fR\fIcode-model\fR +\&\fB\-m32 \-m64 \-mapp\-regs \-mno\-app\-regs +\&\-mfaster\-structs \-mno\-faster\-structs +\&\-mfpu \-mno\-fpu \-mhard\-float \-msoft\-float +\&\-mhard\-quad\-float \-msoft\-quad\-float +\&\-mimpure\-text \-mno\-impure\-text \-mlittle\-endian +\&\-mstack\-bias \-mno\-stack\-bias +\&\-munaligned\-doubles \-mno\-unaligned\-doubles +\&\-mv8plus \-mno\-v8plus \-mvis \-mno\-vis +\&\-threads \-pthreads \-pthread\fR +.Sp +\&\fI\s-1SPU\s0 Options\fR +\&\fB\-mwarn\-reloc \-merror\-reloc +\&\-msafe\-dma \-munsafe\-dma +\&\-mbranch\-hints +\&\-msmall\-mem \-mlarge\-mem \-mstdmain +\&\-mfixed\-range=\fR\fIregister-range\fR .Sp -\&\fIS/390 and zSeries Options\fR +\&\fISystem V Options\fR +\&\fB\-Qy \-Qn \-YP,\fR\fIpaths\fR \fB\-Ym,\fR\fIdir\fR .Sp -\&\fB\-mhard-float \-msoft-float \-mbackchain \-mno-backchain -\&\-msmall-exec \-mno-small-exec \-mmvcle \-mno-mvcle -\&\-m64 \-m31 \-mdebug \-mno-debug\fR +\&\fIV850 Options\fR +\&\fB\-mlong\-calls \-mno\-long\-calls \-mep \-mno\-ep +\&\-mprolog\-function \-mno\-prolog\-function \-mspace +\&\-mtda=\fR\fIn\fR \fB\-msda=\fR\fIn\fR \fB\-mzda=\fR\fIn\fR +\&\fB\-mapp\-regs \-mno\-app\-regs +\&\-mdisable\-callt \-mno\-disable\-callt +\&\-mv850e1 +\&\-mv850e +\&\-mv850 \-mbig\-switch\fR .Sp -\&\fI\s-1CRIS\s0 Options\fR +\&\fI\s-1VAX\s0 Options\fR +\&\fB\-mg \-mgnu \-munix\fR .Sp -\&\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\-metrax4 \-metrax100 \-mpdebug \-mcc-init \-mno-side-effects -\&\-mstack-align \-mdata-align \-mconst-align -\&\-m32\-bit \-m16\-bit \-m8\-bit \-mno-prologue-epilogue \-mno-gotplt -\&\-melf \-maout \-melinux \-mlinux \-sim \-sim2\fR +\&\fIVxWorks Options\fR +\&\fB\-mrtp \-non\-static \-Bstatic \-Bdynamic +\&\-Xbind\-lazy \-Xbind\-now\fR .Sp -\&\fI\s-1PDP-11\s0 Options\fR +\&\fIx86\-64 Options\fR +See i386 and x86\-64 Options. .Sp -\&\fB\-mfpu \-msoft-float \-mac0 \-mno-ac0 \-m40 \-m45 \-m10 -\&\-mbcopy \-mbcopy-builtin \-mint32 \-mno-int16 -\&\-mint16 \-mno-int32 \-mfloat32 \-mno-float64 -\&\-mfloat64 \-mno-float32 \-mabshi \-mno-abshi -\&\-mbranch-expensive \-mbranch-cheap -\&\-msplit \-mno-split \-munix-asm \-mdec-asm\fR +\&\fIi386 and x86\-64 Windows Options\fR +\&\fB\-mconsole \-mcygwin \-mno\-cygwin \-mdll +\&\-mnop\-fun\-dllimport \-mthread \-mwin32 \-mwindows\fR .Sp \&\fIXstormy16 Options\fR -.Sp \&\fB\-msim\fR .Sp \&\fIXtensa Options\fR -.Sp -\&\fB\-mbig-endian \-mlittle-endian -\&\-mdensity \-mno-density -\&\-mmac16 \-mno-mac16 -\&\-mmul16 \-mno-mul16 -\&\-mmul32 \-mno-mul32 -\&\-mnsa \-mno-nsa -\&\-mminmax \-mno-minmax -\&\-msext \-mno-sext -\&\-mbooleans \-mno-booleans -\&\-mhard-float \-msoft-float -\&\-mfused-madd \-mno-fused-madd -\&\-mserialize-volatile \-mno-serialize-volatile -\&\-mtext-section-literals \-mno-text-section-literals -\&\-mtarget-align \-mno-target-align -\&\-mlongcalls \-mno-longcalls\fR -.Ip "\fICode Generation Options\fR" 4 +\&\fB\-mconst16 \-mno\-const16 +\&\-mfused\-madd \-mno\-fused\-madd +\&\-mserialize\-volatile \-mno\-serialize\-volatile +\&\-mtext\-section\-literals \-mno\-text\-section\-literals +\&\-mtarget\-align \-mno\-target\-align +\&\-mlongcalls \-mno\-longcalls\fR +.Sp +\&\fIzSeries Options\fR +See S/390 and zSeries Options. +.IP "\fICode Generation Options\fR" 4 .IX Item "Code Generation Options" -\&\fB\-fcall-saved-\fR\fIreg\fR \fB\-fcall-used-\fR\fIreg\fR -\&\fB\-ffixed-\fR\fIreg\fR \fB\-fexceptions -\&\-fnon-call-exceptions \-funwind-tables -\&\-fasynchronous-unwind-tables -\&\-finhibit-size-directive \-finstrument-functions -\&\-fno-common \-fno-ident \-fno-gnu-linker -\&\-fpcc-struct-return \-fpic \-fPIC -\&\-freg-struct-return \-fshared-data \-fshort-enums -\&\-fshort-double \-fshort-wchar \-fvolatile -\&\-fvolatile-global \-fvolatile-static -\&\-fverbose-asm \-fpack-struct \-fstack-check -\&\-fstack-limit-register=\fR\fIreg\fR \fB\-fstack-limit-symbol=\fR\fIsym\fR -\&\fB\-fargument-alias \-fargument-noalias -\&\-fargument-noalias-global \-fleading-underscore\fR +\&\fB\-fcall\-saved\-\fR\fIreg\fR \fB\-fcall\-used\-\fR\fIreg\fR +\&\fB\-ffixed\-\fR\fIreg\fR \fB\-fexceptions +\&\-fnon\-call\-exceptions \-funwind\-tables +\&\-fasynchronous\-unwind\-tables +\&\-finhibit\-size\-directive \-finstrument\-functions +\&\-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,... +\&\-fno\-common \-fno\-ident +\&\-fpcc\-struct\-return \-fpic \-fPIC \-fpie \-fPIE +\&\-fno\-jump\-tables +\&\-frecord\-gcc\-switches +\&\-freg\-struct\-return \-fshort\-enums +\&\-fshort\-double \-fshort\-wchar +\&\-fverbose\-asm \-fpack\-struct[=\fR\fIn\fR\fB] \-fstack\-check +\&\-fstack\-limit\-register=\fR\fIreg\fR \fB\-fstack\-limit\-symbol=\fR\fIsym\fR +\&\fB\-fno\-stack\-limit \-fargument\-alias \-fargument\-noalias +\&\-fargument\-noalias\-global \-fargument\-noalias\-anything +\&\-fleading\-underscore \-ftls\-model=\fR\fImodel\fR +\&\fB\-ftrapv \-fwrapv \-fbounds\-check +\&\-fvisibility\fR .Sh "Options Controlling the Kind of Output" .IX Subsection "Options Controlling the Kind of Output" Compilation can involve up to four stages: preprocessing, compilation -proper, assembly and linking, always in that order. The first three -stages apply to an individual source file, and end by producing an -object file; linking combines all the object files (those newly -compiled, and those specified as input) into an executable file. +proper, assembly and linking, always in that order. \s-1GCC\s0 is capable of +preprocessing and compiling several files either into several +assembler input files, or into one assembler input file; then each +assembler input file produces an object file, and linking combines all +the object files (those newly compiled, and those specified as input) +into an executable file. .PP For any given input file, the file name suffix determines what kind of compilation is done: -.Ip "\fIfile\fR\fB.c\fR" 4 +.IP "\fIfile\fR\fB.c\fR" 4 .IX Item "file.c" 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" 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" \&\*(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" -Objective-C source code. Note that you must link with the library -\&\fIlibobjc.a\fR to make an Objective-C program work. -.Ip "\fIfile\fR\fB.mi\fR" 4 +Objective-C source code. Note that you must link with the \fIlibobjc\fR +library to make an Objective-C program work. +.IP "\fIfile\fR\fB.mi\fR" 4 .IX Item "file.mi" Objective-C source code which should not be preprocessed. -.Ip "\fIfile\fR\fB.h\fR" 4 +.IP "\fIfile\fR\fB.mm\fR" 4 +.IX Item "file.mm" +.PD 0 +.IP "\fIfile\fR\fB.M\fR" 4 +.IX Item "file.M" +.PD +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 +to a literal capital M. +.IP "\fIfile\fR\fB.mii\fR" 4 +.IX Item "file.mii" +Objective\-\*(C+ source code which should not be preprocessed. +.IP "\fIfile\fR\fB.h\fR" 4 .IX Item "file.h" -C header file (not to be compiled or linked). -.Ip "\fIfile\fR\fB.cc\fR" 4 +C, \*(C+, Objective-C or Objective\-\*(C+ header file to be turned into a +precompiled header. +.IP "\fIfile\fR\fB.cc\fR" 4 .IX Item "file.cc" .PD 0 -.Ip "\fIfile\fR\fB.cp\fR" 4 +.IP "\fIfile\fR\fB.cp\fR" 4 .IX Item "file.cp" -.Ip "\fIfile\fR\fB.cxx\fR" 4 +.IP "\fIfile\fR\fB.cxx\fR" 4 .IX Item "file.cxx" -.Ip "\fIfile\fR\fB.cpp\fR" 4 +.IP "\fIfile\fR\fB.cpp\fR" 4 .IX Item "file.cpp" -.Ip "\fIfile\fR\fB.c++\fR" 4 +.IP "\fIfile\fR\fB.CPP\fR" 4 +.IX Item "file.CPP" +.IP "\fIfile\fR\fB.c++\fR" 4 .IX Item "file.c++" -.Ip "\fIfile\fR\fB.C\fR" 4 +.IP "\fIfile\fR\fB.C\fR" 4 .IX Item "file.C" .PD \&\*(C+ source code which must be preprocessed. Note that in \fB.cxx\fR, the last two letters must both be literally \fBx\fR. Likewise, \&\fB.C\fR refers to a literal capital C. -.Ip "\fIfile\fR\fB.f\fR" 4 +.IP "\fIfile\fR\fB.mm\fR" 4 +.IX Item "file.mm" +.PD 0 +.IP "\fIfile\fR\fB.M\fR" 4 +.IX Item "file.M" +.PD +Objective\-\*(C+ source code which must be preprocessed. +.IP "\fIfile\fR\fB.mii\fR" 4 +.IX Item "file.mii" +Objective\-\*(C+ source code which should not be preprocessed. +.IP "\fIfile\fR\fB.hh\fR" 4 +.IX Item "file.hh" +.PD 0 +.IP "\fIfile\fR\fB.H\fR" 4 +.IX Item "file.H" +.IP "\fIfile\fR\fB.hp\fR" 4 +.IX Item "file.hp" +.IP "\fIfile\fR\fB.hxx\fR" 4 +.IX Item "file.hxx" +.IP "\fIfile\fR\fB.hpp\fR" 4 +.IX Item "file.hpp" +.IP "\fIfile\fR\fB.HPP\fR" 4 +.IX Item "file.HPP" +.IP "\fIfile\fR\fB.h++\fR" 4 +.IX Item "file.h++" +.IP "\fIfile\fR\fB.tcc\fR" 4 +.IX Item "file.tcc" +.PD +\&\*(C+ header file to be turned into a precompiled header. +.IP "\fIfile\fR\fB.f\fR" 4 .IX Item "file.f" .PD 0 -.Ip "\fIfile\fR\fB.for\fR" 4 +.IP "\fIfile\fR\fB.for\fR" 4 .IX Item "file.for" -.Ip "\fIfile\fR\fB.FOR\fR" 4 -.IX Item "file.FOR" +.IP "\fIfile\fR\fB.ftn\fR" 4 +.IX Item "file.ftn" .PD -Fortran source code which should not be preprocessed. -.Ip "\fIfile\fR\fB.F\fR" 4 +Fixed form Fortran source code which should not be preprocessed. +.IP "\fIfile\fR\fB.F\fR" 4 .IX Item "file.F" .PD 0 -.Ip "\fIfile\fR\fB.fpp\fR" 4 +.IP "\fIfile\fR\fB.FOR\fR" 4 +.IX Item "file.FOR" +.IP "\fIfile\fR\fB.fpp\fR" 4 .IX Item "file.fpp" -.Ip "\fIfile\fR\fB.FPP\fR" 4 +.IP "\fIfile\fR\fB.FPP\fR" 4 .IX Item "file.FPP" +.IP "\fIfile\fR\fB.FTN\fR" 4 +.IX Item "file.FTN" .PD -Fortran source code which must be preprocessed (with the traditional +Fixed form Fortran source code which must be preprocessed (with the traditional preprocessor). -.Ip "\fIfile\fR\fB.r\fR" 4 -.IX Item "file.r" -Fortran source code which must be preprocessed with a \s-1RATFOR\s0 -preprocessor (not included with \s-1GCC\s0). -.Ip "\fIfile\fR\fB.ads\fR" 4 +.IP "\fIfile\fR\fB.f90\fR" 4 +.IX Item "file.f90" +.PD 0 +.IP "\fIfile\fR\fB.f95\fR" 4 +.IX Item "file.f95" +.IP "\fIfile\fR\fB.f03\fR" 4 +.IX Item "file.f03" +.IP "\fIfile\fR\fB.f08\fR" 4 +.IX Item "file.f08" +.PD +Free form Fortran source code which should not be preprocessed. +.IP "\fIfile\fR\fB.F90\fR" 4 +.IX Item "file.F90" +.PD 0 +.IP "\fIfile\fR\fB.F95\fR" 4 +.IX Item "file.F95" +.IP "\fIfile\fR\fB.F03\fR" 4 +.IX Item "file.F03" +.IP "\fIfile\fR\fB.F08\fR" 4 +.IX Item "file.F08" +.PD +Free form Fortran source code which must be preprocessed (with the +traditional preprocessor). +.IP "\fIfile\fR\fB.ads\fR" 4 .IX Item "file.ads" Ada source code file which contains a library unit declaration (a declaration of a package, subprogram, or generic, or a generic instantiation), or a library unit renaming declaration (a package, generic, or subprogram renaming declaration). Such files are also called \fIspecs\fR. -.Ip "\fIfile\fR\fB.adb\fR" 4 +.IP "\fIfile\fR\fB.adb\fR" 4 .IX Item "file.adb" Ada source code file containing a library unit body (a subprogram or 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" Assembler code. -.Ip "\fIfile\fR\fB.S\fR" 4 +.IP "\fIfile\fR\fB.S\fR" 4 .IX Item "file.S" +.PD 0 +.IP "\fIfile\fR\fB.sx\fR" 4 +.IX Item "file.sx" +.PD Assembler code which must be preprocessed. -.Ip "\fIother\fR" 4 +.IP "\fIother\fR" 4 .IX Item "other" An object file to be fed straight into linking. Any file name with no recognized suffix is treated this way. .PP 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" Specify explicitly the \fIlanguage\fR for the following input files (rather than letting the compiler choose a default based on the file name suffix). This option applies to all following input files until the next \fB\-x\fR option. Possible values for \fIlanguage\fR are: .Sp -.Vb 7 -\& c c-header cpp-output -\& c++ c++-cpp-output -\& objective-c objc-cpp-output -\& assembler assembler-with-cpp +.Vb 8 +\& 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 +\& assembler assembler\-with\-cpp \& ada -\& f77 f77-cpp-input ratfor +\& f77 f77\-cpp\-input f95 f95\-cpp\-input \& java .Ve -.Ip "\fB\-x none\fR" 4 +.IP "\fB\-x none\fR" 4 .IX Item "-x none" 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 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" 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 -\&\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 -indication. +indication. The C, \*(C+, and Fortran frontends return 4, if an internal +compiler error is encountered. .PP 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 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, \&\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" 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 @@ -830,7 +1088,7 @@ the suffix \fB.c\fR, \fB.i\fR, \fB.s\fR, etc., with \fB.o\fR. .Sp Unrecognized input files, not requiring compilation or assembly, are ignored. -.Ip "\fB\-S\fR" 4 +.IP "\fB\-S\fR" 4 .IX Item "-S" 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 @@ -840,76 +1098,236 @@ 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. .Sp Input files that don't require compilation are ignored. -.Ip "\fB\-E\fR" 4 +.IP "\fB\-E\fR" 4 .IX Item "-E" 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 standard output. .Sp 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" Place output in file \fIfile\fR. This applies regardless to whatever sort of output is being produced, whether it be an executable file, an object file, an assembler file or preprocessed C code. .Sp -Since only one output file can be specified, it does not make sense to -use \fB\-o\fR when compiling more than one input file, unless you are -producing an executable file as output. -.Sp -If \fB\-o\fR is not specified, the default is to put an executable file -in \fIa.out\fR, the object file for \fI\fIsource\fI.\fIsuffix\fI\fR in -\&\fI\fIsource\fI.o\fR, its assembler file in \fI\fIsource\fI.s\fR, and -all preprocessed C source on standard output. -.Ip "\fB\-v\fR" 4 +If \fB\-o\fR is not specified, the default is to put an executable +file in \fIa.out\fR, the object file for +\&\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 +\&\fI\fIsource\fI.\fIsuffix\fI.gch\fR, and all preprocessed C source on +standard output. +.IP "\fB\-v\fR" 4 .IX Item "-v" Print (on standard error output) the commands executed to run the stages of compilation. Also print the version number of the compiler driver program and of the preprocessor and the compiler proper. -.Ip "\fB\-###\fR" 4 +.IP "\fB\-###\fR" 4 .IX Item "-###" 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 driver-generated command lines. -.Ip "\fB\-pipe\fR" 4 +.IP "\fB\-pipe\fR" 4 .IX Item "-pipe" Use pipes rather than temporary files for communication between the 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 no trouble. -.Ip "\fB\*(--help\fR" 4 -.IX Item "help" +.IP "\fB\-combine\fR" 4 +.IX Item "-combine" +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 +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 +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 +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 +\&\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 +with \fB\-save\-temps\fR, the compiler will generate multiple +pre-processed files +(one for each source file), but only one (combined) \fI.o\fR or +\&\fI.s\fR file. +.IP "\fB\-\-help\fR" 4 +.IX Item "--help" 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 -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 -they accept. If the \fB\-W\fR option is also specified then command -line options which have no documentation associated with them will also -be displayed. -.Ip "\fB\*(--target-help\fR" 4 -.IX Item "target-help" -Print (on the standard output) a description of target specific command -line options for each tool. -.Ip "\fB\*(--version\fR" 4 -.IX Item "version" +they accept. If the \fB\-Wextra\fR option has also been specified +(prior to the \fB\-\-help\fR option), then command line options which +have no documentation associated with them will also be displayed. +.IP "\fB\-\-target\-help\fR" 4 +.IX Item "--target-help" +Print (on the standard output) a description of target-specific command +line options for each tool. For some targets extra target-specific +information may also be printed. +.IP "\fB\-\-help={\fR\fIclass\fR|[\fB^\fR]\fIqualifier\fR\fB}\fR[\fB,...\fR]" 4 +.IX Item "--help={class|[^]qualifier}[,...]" +Print (on the standard output) a description of the command line +options understood by the compiler that fit into all specified classes +and qualifiers. These are the supported classes: +.RS 4 +.IP "\fBoptimizers\fR" 4 +.IX Item "optimizers" +This will display all of the optimization options supported by the +compiler. +.IP "\fBwarnings\fR" 4 +.IX Item "warnings" +This will display all of the options controlling warning messages +produced by the compiler. +.IP "\fBtarget\fR" 4 +.IX Item "target" +This will display target-specific options. Unlike the +\&\fB\-\-target\-help\fR option however, target-specific options of the +linker and assembler will not be displayed. This is because those +tools do not currently support the extended \fB\-\-help=\fR syntax. +.IP "\fBparams\fR" 4 +.IX Item "params" +This will display the values recognized by the \fB\-\-param\fR +option. +.IP "\fIlanguage\fR" 4 +.IX Item "language" +This will display the options supported for \fIlanguage\fR, where +\&\fIlanguage\fR is the name of one of the languages supported in this +version of \s-1GCC\s0. +.IP "\fBcommon\fR" 4 +.IX Item "common" +This will display the options that are common to all languages. +.RE +.RS 4 +.Sp +These are the supported qualifiers: +.IP "\fBundocumented\fR" 4 +.IX Item "undocumented" +Display only those options which are undocumented. +.IP "\fBjoined\fR" 4 +.IX Item "joined" +Display options which take an argument that appears after an equal +sign in the same continuous piece of text, such as: +\&\fB\-\-help=target\fR. +.IP "\fBseparate\fR" 4 +.IX Item "separate" +Display options which take an argument that appears as a separate word +following the original option, such as: \fB\-o output-file\fR. +.RE +.RS 4 +.Sp +Thus for example to display all the undocumented target-specific +switches supported by the compiler the following can be used: +.Sp +.Vb 1 +\& \-\-help=target,undocumented +.Ve +.Sp +The sense of a qualifier can be inverted by prefixing it with the +\&\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 +argument), which have a description the following can be used: +.Sp +.Vb 1 +\& \-\-help=warnings,^joined,^undocumented +.Ve +.Sp +The argument to \fB\-\-help=\fR should not consist solely of inverted +qualifiers. +.Sp +Combining several classes is possible, although this usually +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 +\&\fItarget\fR. So for example to display all the target-specific +optimization options the following can be used: +.Sp +.Vb 1 +\& \-\-help=target,optimizers +.Ve +.Sp +The \fB\-\-help=\fR option can be repeated on the command line. Each +successive use will display its requested class of options, skipping +those that have already been displayed. +.Sp +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 is changed. Instead of describing the displayed +options, an indication is given as to whether the option is enabled, +disabled or set to a specific value (assuming that the compiler +knows this at the point where the \fB\-\-help=\fR option is used). +.Sp +Here is a truncated example from the \s-1ARM\s0 port of \fBgcc\fR: +.Sp +.Vb 5 +\& % gcc \-Q \-mabi=2 \-\-help=target \-c +\& The following options are target specific: +\& \-mabi= 2 +\& \-mabort\-on\-noreturn [disabled] +\& \-mapcs [disabled] +.Ve +.Sp +The output is sensitive to the effects of previous command line +options, so for example it is possible to find out which optimizations +are enabled at \fB\-O2\fR by using: +.Sp +.Vb 1 +\& \-Q \-O2 \-\-help=optimizers +.Ve +.Sp +Alternatively you can discover which binary optimizations are enabled +by \fB\-O3\fR by using: +.Sp +.Vb 3 +\& gcc \-c \-Q \-O3 \-\-help=optimizers > /tmp/O3\-opts +\& gcc \-c \-Q \-O2 \-\-help=optimizers > /tmp/O2\-opts +\& diff /tmp/O2\-opts /tmp/O3\-opts | grep enabled +.Ve +.RE +.IP "\fB\-\-version\fR" 4 +.IX Item "--version" Display the version number and copyrights of the invoked \s-1GCC\s0. +.IP "\fB\-wrapper\fR" 4 +.IX Item "-wrapper" +Invoke all subcommands under a wrapper program. It takes a single +comma separated list as an argument, which will be used to invoke +the wrapper: +.Sp +.Vb 1 +\& gcc \-c t.c \-wrapper gdb,\-\-args +.Ve +.Sp +This will invoke all subprograms of gcc under \*(L"gdb \-\-args\*(R", +thus cc1 invocation will be \*(L"gdb \-\-args cc1 ...\*(R". +.IP "\fB@\fR\fIfile\fR" 4 +.IX Item "@file" +Read command-line options from \fIfile\fR. The options read are +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 +literally, and not removed. +.Sp +Options in \fIfile\fR are separated by whitespace. A whitespace +character may be included in an option by surrounding the entire +option in either single or double quotes. Any character (including a +backslash) may be included by prefixing the character to be included +with a backslash. The \fIfile\fR may itself contain additional +@\fIfile\fR options; any such options will be processed recursively. .Sh "Compiling \*(C+ Programs" .IX Subsection "Compiling Programs" \&\*(C+ source files conventionally use one of the suffixes \fB.C\fR, -\&\fB.cc\fR, \fB.cpp\fR, \fB.c++\fR, \fB.cp\fR, or \fB.cxx\fR; +\&\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.H\fR, or (for shared template code) \fB.tcc\fR; and 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 -call the compiler the same way as for compiling C programs (usually with -the name \fBgcc\fR). -.PP -However, \*(C+ programs often require class libraries as well as a -compiler that understands the \*(C+ language\-\-\-and under some -circumstances, you might want to compile programs from standard input, -or otherwise without a suffix that flags them as \*(C+ programs. -\&\fBg++\fR is a program that calls \s-1GCC\s0 with the default language -set to \*(C+, and automatically specifies linking against the \*(C+ -library. On many systems, \fBg++\fR is also -installed with the name \fBc++\fR. +call the compiler the same way as for compiling C programs (usually +with the name \fBgcc\fR). +.PP +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, +\&\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 +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+ +compilations. On many systems, \fBg++\fR is also installed with +the name \fBc++\fR. .PP When you compile \*(C+ programs, you may specify many of the same command-line options that you use for compiling programs in any @@ -918,14 +1336,15 @@ languages; or options that are meaningful only for \*(C+ programs. .Sh "Options Controlling C Dialect" .IX Subsection "Options Controlling C Dialect" The following options control the dialect of C (or languages derived -from C, such as \*(C+ and Objective-C) that the compiler accepts: -.Ip "\fB\-ansi\fR" 4 +from C, such as \*(C+, Objective-C and Objective\-\*(C+) that the compiler +accepts: +.IP "\fB\-ansi\fR" 4 .IX Item "-ansi" -In C mode, support all \s-1ISO\s0 C89 programs. In \*(C+ mode, -remove \s-1GNU\s0 extensions that conflict with \s-1ISO\s0 \*(C+. +In C mode, this is equivalent to \fB\-std=c89\fR. In \*(C+ mode, it is +equivalent to \fB\-std=c++98\fR. .Sp This turns off certain features of \s-1GCC\s0 that are incompatible with \s-1ISO\s0 -C89 (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 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 @@ -943,7 +1362,7 @@ without \fB\-ansi\fR. .Sp The \fB\-ansi\fR option does not cause non-ISO programs to be rejected gratuitously. For that, \fB\-pedantic\fR is required in -addition to \fB\-ansi\fR. +addition to \fB\-ansi\fR. .Sp 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 @@ -951,63 +1370,111 @@ 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 programs that might use these names for other things. .Sp -Functions which 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 -functions with \fB\-ansi\fR is used. -.Ip "\fB\-std=\fR" 4 +functions when \fB\-ansi\fR is used. +.IP "\fB\-std=\fR" 4 .IX Item "-std=" -Determine the language standard. This option is currently only -supported when compiling C. A value for this option must be provided; -possible values are +Determine the language standard. This option +is currently only supported when compiling C or \*(C+. +.Sp +The compiler can accept several base standards, such as \fBc89\fR or +\&\fBc++98\fR, and \s-1GNU\s0 dialects of those standards, such as +\&\fBgnu89\fR or \fBgnu++98\fR. By specifying a base standard, the +compiler will accept all programs following that standard and those +using \s-1GNU\s0 extensions that do not contradict it. For example, +\&\fB\-std=c89\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 +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 +expression. On the other hand, by specifying a \s-1GNU\s0 dialect of a +standard, all features the compiler support are enabled, even when +those features change the meaning of the base standard and some +strict-conforming programs may be rejected. The particular standard +is used by \fB\-pedantic\fR to identify which features are \s-1GNU\s0 +extensions given that version of the standard. For example +\&\fB\-std=gnu89 \-pedantic\fR would warn about \*(C+ style \fB//\fR +comments, while \fB\-std=gnu99 \-pedantic\fR would not. +.Sp +A value for this option must be provided; possible values are .RS 4 -.Ip "\fBc89\fR" 4 +.IP "\fBc89\fR" 4 .IX Item "c89" .PD 0 -.Ip "\fBiso9899:1990\fR" 4 +.IP "\fBiso9899:1990\fR" 4 .IX Item "iso9899:1990" .PD -\&\s-1ISO\s0 C89 (same as \fB\-ansi\fR). -.Ip "\fBiso9899:199409\fR" 4 +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. +.IP "\fBiso9899:199409\fR" 4 .IX Item "iso9899:199409" -\&\s-1ISO\s0 C89 as modified in amendment 1. -.Ip "\fBc99\fR" 4 +\&\s-1ISO\s0 C90 as modified in amendment 1. +.IP "\fBc99\fR" 4 .IX Item "c99" .PD 0 -.Ip "\fBc9x\fR" 4 +.IP "\fBc9x\fR" 4 .IX Item "c9x" -.Ip "\fBiso9899:1999\fR" 4 +.IP "\fBiso9899:1999\fR" 4 .IX Item "iso9899:1999" -.Ip "\fBiso9899:199x\fR" 4 +.IP "\fBiso9899:199x\fR" 4 .IX Item "iso9899:199x" .PD \&\s-1ISO\s0 C99. Note that this standard is not yet fully supported; see -<\fBhttp://gcc.gnu.org/gcc-3.1/c99status.html\fR> for more information. The +<\fBhttp://gcc.gnu.org/gcc\-4.4/c99status.html\fR> for more information. The names \fBc9x\fR and \fBiso9899:199x\fR are deprecated. -.Ip "\fBgnu89\fR" 4 +.IP "\fBgnu89\fR" 4 .IX Item "gnu89" -Default, \s-1ISO\s0 C89 plus \s-1GNU\s0 extensions (including some C99 features). -.Ip "\fBgnu99\fR" 4 +\&\s-1GNU\s0 dialect of \s-1ISO\s0 C90 (including some C99 features). This +is the default for C code. +.IP "\fBgnu99\fR" 4 .IX Item "gnu99" .PD 0 -.Ip "\fBgnu9x\fR" 4 +.IP "\fBgnu9x\fR" 4 .IX Item "gnu9x" .PD -\&\s-1ISO\s0 C99 plus \s-1GNU\s0 extensions. 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. +.IP "\fBc++98\fR" 4 +.IX Item "c++98" +The 1998 \s-1ISO\s0 \*(C+ standard plus amendments. Same as \fB\-ansi\fR for +\&\*(C+ code. +.IP "\fBgnu++98\fR" 4 +.IX Item "gnu++98" +\&\s-1GNU\s0 dialect of \fB\-std=c++98\fR. This is the default for +\&\*(C+ code. +.IP "\fBc++0x\fR" 4 +.IX Item "c++0x" +The working draft of the upcoming \s-1ISO\s0 \*(C+0x standard. This option +enables experimental features that are likely to be included in +\&\*(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 +not part of the \*(C+0x standard. +.IP "\fBgnu++0x\fR" 4 +.IX Item "gnu++0x" +\&\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. .RE .RS 4 -.Sp -Even when this option is not specified, you can still use some of the -features of newer standards in so far as they do not conflict with -previous C standards. For example, you may use \f(CW\*(C`_\|_restrict_\|_\*(C'\fR even -when \fB\-std=c99\fR is not specified. -.Sp -The \fB\-std\fR options specifying some version of \s-1ISO\s0 C have the same -effects as \fB\-ansi\fR, except that features that were not in \s-1ISO\s0 C89 -but are in the specified version (for example, \fB//\fR comments and -the \f(CW\*(C`inline\*(C'\fR keyword in \s-1ISO\s0 C99) are not disabled. .RE -.Ip "\fB\-aux-info\fR \fIfilename\fR" 4 +.IP "\fB\-fgnu89\-inline\fR" 4 +.IX Item "-fgnu89-inline" +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. + This option +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 +C99 mode. Using this option is roughly equivalent to adding the +\&\f(CW\*(C`gnu_inline\*(C'\fR function attribute to all inline functions. +.Sp +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 +specifies the default behavior). This option was first supported in +\&\s-1GCC\s0 4.3. This option is not supported in C89 or gnu89 mode. +.Sp +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 +in effect for \f(CW\*(C`inline\*(C'\fR functions. +.IP "\fB\-aux\-info\fR \fIfilename\fR" 4 .IX Item "-aux-info filename" Output to the given filename prototyped declarations for all functions declared and/or defined in a translation unit, including those in header @@ -1019,30 +1486,30 @@ implicit, prototyped or unprototyped (\fBI\fR, \fBN\fR for new or \&\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 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 comments, after the declaration. -.Ip "\fB\-fno-asm\fR" 4 +.IP "\fB\-fno\-asm\fR" 4 .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 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 -instead. \fB\-ansi\fR implies \fB\-fno-asm\fR. +instead. \fB\-ansi\fR implies \fB\-fno\-asm\fR. .Sp 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 -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 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. -.Ip "\fB\-fno-builtin\fR" 4 +.IP "\fB\-fno\-builtin\fR" 4 .IX Item "-fno-builtin" .PD 0 -.Ip "\fB\-fno-builtin-\fR\fIfunction\fR\fB \fR(C and Objective-C only)" 4 -.IX Item "-fno-builtin-function (C and Objective-C only)" +.IP "\fB\-fno\-builtin\-\fR\fIfunction\fR" 4 +.IX Item "-fno-builtin-function" .PD Don't recognize built-in functions that do not begin with -\&\fB_\|_builtin_\fR as prefix. +\&\fB_\|_builtin_\fR as prefix. .Sp \&\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 @@ -1050,119 +1517,91 @@ instructions that adjust the stack directly, and calls to \f(CW\*(C`memcpy\*(C'\ 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 cannot set a breakpoint on those calls, nor can you change the behavior -of the functions by linking with a different library. -.Sp -In \*(C+, \fB\-fno-builtin\fR is always in effect. The \fB\-fbuiltin\fR -option has no effect. Therefore, in \*(C+, the only way to get the -optimization benefits of built-in functions is to call the function -using the \fB_\|_builtin_\fR prefix. The \s-1GNU\s0 \*(C+ Standard Library uses -built-in functions to implement many functions (like -\&\f(CW\*(C`std::strchr\*(C'\fR), so that you automatically get efficient code. -.Sp -With the \fB\-fno-builtin-\fR\fIfunction\fR option, not available -when compiling \*(C+, only the built-in function \fIfunction\fR is +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 +information about that function to warn about problems with calls to +that function, or to generate more efficient code, even if the +resulting code still contains calls to that function. For example, +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 +known not to modify global memory. +.Sp +With the \fB\-fno\-builtin\-\fR\fIfunction\fR option +only the built-in function \fIfunction\fR is disabled. \fIfunction\fR must not begin with \fB_\|_builtin_\fR. If a -function is named this 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 -\&\fB\-fbuiltin-\fR\fIfunction\fR option; if you wish to enable -built-in functions selectively when using \fB\-fno-builtin\fR or +\&\fB\-fbuiltin\-\fR\fIfunction\fR option; if you wish to enable +built-in functions selectively when using \fB\-fno\-builtin\fR or \&\fB\-ffreestanding\fR, you may define macros such as: .Sp .Vb 2 -\& #define abs(n) __builtin_abs ((n)) -\& #define strcpy(d, s) __builtin_strcpy ((d), (s)) +\& #define abs(n) _\|_builtin_abs ((n)) +\& #define strcpy(d, s) _\|_builtin_strcpy ((d), (s)) .Ve -.Ip "\fB\-fhosted\fR" 4 +.IP "\fB\-fhosted\fR" 4 .IX Item "-fhosted" Assert that compilation takes place in a hosted environment. This implies \&\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 type of \f(CW\*(C`int\*(C'\fR. Examples are nearly everything except a kernel. -This is equivalent to \fB\-fno-freestanding\fR. -.Ip "\fB\-ffreestanding\fR" 4 +This is equivalent to \fB\-fno\-freestanding\fR. +.IP "\fB\-ffreestanding\fR" 4 .IX Item "-ffreestanding" 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 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. -.Ip "\fB\-trigraphs\fR" 4 +This is equivalent to \fB\-fno\-hosted\fR. +.IP "\fB\-fopenmp\fR" 4 +.IX Item "-fopenmp" +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 +compiler generates parallel code according to the OpenMP Application +Program Interface v2.5 <\fBhttp://www.openmp.org/\fR>. This option +implies \fB\-pthread\fR, and thus is only supported on targets that +have support for \fB\-pthread\fR. +.IP "\fB\-fms\-extensions\fR" 4 +.IX Item "-fms-extensions" +Accept some non-standard constructs used in Microsoft header files. +.Sp +Some cases of unnamed fields in structures and unions are only +accepted with this option. +.IP "\fB\-trigraphs\fR" 4 .IX Item "-trigraphs" 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. -.Ip "\fB\-no-integrated-cpp\fR" 4 +.IP "\fB\-no\-integrated\-cpp\fR" 4 .IX Item "-no-integrated-cpp" -Invoke the external cpp during compilation. The default is to use the -integrated cpp (internal cpp). This option also allows a -user-supplied cpp via the \fB\-B\fR option. This flag is applicable -in both C and \*(C+ modes. -.Sp -We do not guarantee to retain this option in future, and we may change -its semantics. -.Ip "\fB\-traditional\fR" 4 +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 +\&\fB\-B\fR option. The user supplied compilation step can then add in +an additional preprocessing step after normal preprocessing but before +compiling. The default is to use the integrated cpp (internal cpp) +.Sp +The semantics of this option will change if \*(L"cc1\*(R", \*(L"cc1plus\*(R", and +\&\*(L"cc1obj\*(R" are merged. +.IP "\fB\-traditional\fR" 4 .IX Item "-traditional" -Attempt to support some aspects of traditional C compilers. -Specifically: -.RS 4 -.Ip "\(bu" 4 -All \f(CW\*(C`extern\*(C'\fR declarations take effect globally even if they -are written inside of a function definition. This includes implicit -declarations of functions. -.Ip "\(bu" 4 -The newer keywords \f(CW\*(C`typeof\*(C'\fR, \f(CW\*(C`inline\*(C'\fR, \f(CW\*(C`signed\*(C'\fR, \f(CW\*(C`const\*(C'\fR -and \f(CW\*(C`volatile\*(C'\fR are not recognized. (You can still use the -alternative keywords such as \f(CW\*(C`_\|_typeof_\|_\*(C'\fR, \f(CW\*(C`_\|_inline_\|_\*(C'\fR, and -so on.) -.Ip "\(bu" 4 -Comparisons between pointers and integers are always allowed. -.Ip "\(bu" 4 -Integer types \f(CW\*(C`unsigned short\*(C'\fR and \f(CW\*(C`unsigned char\*(C'\fR promote -to \f(CW\*(C`unsigned int\*(C'\fR. -.Ip "\(bu" 4 -Out-of-range floating point literals are not an error. -.Ip "\(bu" 4 -Certain constructs which \s-1ISO\s0 regards as a single invalid preprocessing -number, such as \fB0xe-0xd\fR, are treated as expressions instead. -.Ip "\(bu" 4 -String ``constants'' are not necessarily constant; they are stored in -writable space, and identical looking constants are allocated -separately. (This is the same as the effect of -\&\fB\-fwritable-strings\fR.) -.Ip "\(bu" 4 -All automatic variables not declared \f(CW\*(C`register\*(C'\fR are preserved by -\&\f(CW\*(C`longjmp\*(C'\fR. Ordinarily, \s-1GNU\s0 C follows \s-1ISO\s0 C: automatic variables -not declared \f(CW\*(C`volatile\*(C'\fR may be clobbered. -.Ip "\(bu" 4 -The character escape sequences \fB\ex\fR and \fB\ea\fR evaluate as the -literal characters \fBx\fR and \fBa\fR respectively. Without -\&\fB\-traditional\fR, \fB\ex\fR is a prefix for the hexadecimal -representation of a character, and \fB\ea\fR produces a bell. -.RE -.RS 4 -.Sp -This option is deprecated and may be removed. -.Sp -You may wish to use \fB\-fno-builtin\fR as well as \fB\-traditional\fR -if your program uses names that are normally \s-1GNU\s0 C built-in functions for -other purposes of its own. -.Sp -You cannot use \fB\-traditional\fR if you include any header files that -rely on \s-1ISO\s0 C features. Some vendors are starting to ship systems with -\&\s-1ISO\s0 C header files and you cannot use \fB\-traditional\fR on such -systems to compile files that include any system headers. -.Sp -The \fB\-traditional\fR option also enables \fB\-traditional-cpp\fR. -.RE -.Ip "\fB\-traditional-cpp\fR" 4 +.PD 0 +.IP "\fB\-traditional\-cpp\fR" 4 .IX Item "-traditional-cpp" -Attempt to support some aspects of traditional C preprocessors. -See the \s-1GNU\s0 \s-1CPP\s0 manual for details. -.Ip "\fB\-fcond-mismatch\fR" 4 +.PD +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. +The preprocessor continues to support a pre-standard mode. See the \s-1GNU\s0 +\&\s-1CPP\s0 manual for details. +.IP "\fB\-fcond\-mismatch\fR" 4 .IX Item "-fcond-mismatch" Allow conditional expressions with mismatched types in the second and third arguments. The value of such an expression is void. This option is not supported for \*(C+. -.Ip "\fB\-funsigned-char\fR" 4 +.IP "\fB\-flax\-vector\-conversions\fR" 4 +.IX Item "-flax-vector-conversions" +Allow implicit conversions between vectors with differing numbers of +elements and/or incompatible element types. This option should not be +used for new code. +.IP "\fB\-funsigned\-char\fR" 4 .IX Item "-funsigned-char" Let the type \f(CW\*(C`char\*(C'\fR be unsigned, like \f(CW\*(C`unsigned char\*(C'\fR. .Sp @@ -1180,51 +1619,27 @@ make such a program work with the opposite default. 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 is always just like one of those two. -.Ip "\fB\-fsigned-char\fR" 4 +.IP "\fB\-fsigned\-char\fR" 4 .IX Item "-fsigned-char" Let the type \f(CW\*(C`char\*(C'\fR be signed, like \f(CW\*(C`signed char\*(C'\fR. .Sp -Note that this is equivalent to \fB\-fno-unsigned-char\fR, which is -the negative form of \fB\-funsigned-char\fR. Likewise, the option -\&\fB\-fno-signed-char\fR is equivalent to \fB\-funsigned-char\fR. -.Ip "\fB\-fsigned-bitfields\fR" 4 +Note that this is equivalent to \fB\-fno\-unsigned\-char\fR, which is +the negative form of \fB\-funsigned\-char\fR. Likewise, the option +\&\fB\-fno\-signed\-char\fR is equivalent to \fB\-funsigned\-char\fR. +.IP "\fB\-fsigned\-bitfields\fR" 4 .IX Item "-fsigned-bitfields" .PD 0 -.Ip "\fB\-funsigned-bitfields\fR" 4 +.IP "\fB\-funsigned\-bitfields\fR" 4 .IX Item "-funsigned-bitfields" -.Ip "\fB\-fno-signed-bitfields\fR" 4 +.IP "\fB\-fno\-signed\-bitfields\fR" 4 .IX Item "-fno-signed-bitfields" -.Ip "\fB\-fno-unsigned-bitfields\fR" 4 +.IP "\fB\-fno\-unsigned\-bitfields\fR" 4 .IX Item "-fno-unsigned-bitfields" .PD 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 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. -.Sp -However, when \fB\-traditional\fR is used, bit-fields are all unsigned -no matter what. -.Ip "\fB\-fwritable-strings\fR" 4 -.IX Item "-fwritable-strings" -Store string constants in the writable data segment and don't uniquize -them. This is for compatibility with old programs which assume they can -write into string constants. The option \fB\-traditional\fR also has -this effect. -.Sp -Writing into string constants is a very bad idea; ``constants'' should -be constant. -.Ip "\fB\-fallow-single-precision\fR" 4 -.IX Item "-fallow-single-precision" -Do not promote single precision math operations to double precision, -even when compiling with \fB\-traditional\fR. -.Sp -Traditional K&R C promotes all floating point operations to double -precision, regardless of the sizes of the operands. On the -architecture for which you are compiling, single precision may be faster -than double precision. If you must use \fB\-traditional\fR, but want -to use single precision operations when the operands are single -precision, use this option. This option has no effect when compiling -with \s-1ISO\s0 or \s-1GNU\s0 C conventions (the default). .Sh "Options Controlling \*(C+ Dialect" .IX Subsection "Options Controlling Dialect" This section describes the command-line options that are only meaningful @@ -1233,29 +1648,40 @@ regardless of what language your program is in. For example, you might compile a file \f(CW\*(C`firstClass.C\*(C'\fR like this: .PP .Vb 1 -\& g++ -g -frepo -O -c firstClass.C +\& g++ \-g \-frepo \-O \-c firstClass.C .Ve +.PP In this example, only \fB\-frepo\fR is an option meant only for \*(C+ programs; you can use the other options with any language supported by \s-1GCC\s0. .PP Here is a list of options that are \fIonly\fR for compiling \*(C+ programs: -.Ip "\fB\-fno-access-control\fR" 4 +.IP "\fB\-fabi\-version=\fR\fIn\fR" 4 +.IX Item "-fabi-version=n" +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 +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. +Therefore, the \s-1ABI\s0 obtained using version 0 will change as \s-1ABI\s0 bugs +are fixed. +.Sp +The default is version 2. +.IP "\fB\-fno\-access\-control\fR" 4 .IX Item "-fno-access-control" Turn off all access checking. This switch is mainly useful for working around bugs in the access control code. -.Ip "\fB\-fcheck-new\fR" 4 +.IP "\fB\-fcheck\-new\fR" 4 .IX Item "-fcheck-new" Check that the pointer returned by \f(CW\*(C`operator new\*(C'\fR is non-null -before attempting to modify the storage allocated. The current Working -Paper requires that \f(CW\*(C`operator new\*(C'\fR never return a null pointer, so -this check is normally unnecessary. -.Sp -An alternative to using this option is to specify that your -\&\f(CW\*(C`operator new\*(C'\fR does not throw any exceptions; if you declare it -\&\fB\f(BIthrow()\fB\fR, G++ will check the return value. See also \fBnew -(nothrow)\fR. -.Ip "\fB\-fconserve-space\fR" 4 +before attempting to modify the storage allocated. This check is +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 +\&\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 +\&\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 +\&\fBnew (nothrow)\fR. +.IP "\fB\-fconserve\-space\fR" 4 .IX Item "-fconserve-space" Put uninitialized or runtime-initialized global variables into the common segment, as C does. This saves space in the executable at the @@ -1266,59 +1692,64 @@ two definitions were merged. .Sp 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. -.Ip "\fB\-fno-const-strings\fR" 4 -.IX Item "-fno-const-strings" -Give string constants type \f(CW\*(C`char *\*(C'\fR instead of type \f(CW\*(C`const -char *\*(C'\fR. By default, G++ uses type \f(CW\*(C`const char *\*(C'\fR as required by -the standard. Even if you use \fB\-fno-const-strings\fR, you cannot -actually modify the value of a string constant, unless you also use -\&\fB\-fwritable-strings\fR. -.Sp -This option might be removed in a future release of G++. For maximum -portability, you should structure your code so that it works with -string constants that have type \f(CW\*(C`const char *\*(C'\fR. -.Ip "\fB\-fdollars-in-identifiers\fR" 4 -.IX Item "-fdollars-in-identifiers" -Accept \fB$\fR in identifiers. You can also explicitly prohibit use of -\&\fB$\fR with the option \fB\-fno-dollars-in-identifiers\fR. (\s-1GNU\s0 C allows -\&\fB$\fR by default on most target systems, but there are a few exceptions.) -Traditional C allowed the character \fB$\fR to form part of -identifiers. However, \s-1ISO\s0 C and \*(C+ forbid \fB$\fR in identifiers. -.Ip "\fB\-fno-elide-constructors\fR" 4 +.IP "\fB\-fno\-deduce\-init\-list\fR" 4 +.IX Item "-fno-deduce-init-list" +Disable deduction of a template type parameter as +std::initializer_list from a brace-enclosed initializer list, i.e. +.Sp +.Vb 4 +\& template auto forward(T t) \-> decltype (realfn (t)) +\& { +\& return realfn (t); +\& } +\& +\& void f() +\& { +\& forward({1,2}); // call forward> +\& } +.Ve +.Sp +This option is present because this deduction is an extension to the +current specification in the \*(C+0x working draft, and there was +some concern about potential overload resolution problems. +.IP "\fB\-ffriend\-injection\fR" 4 +.IX Item "-ffriend-injection" +Inject friend functions into the enclosing namespace, so that they are +visible outside the scope of the class in which they are declared. +Friend functions were documented to work this way in the old Annotated +\&\*(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 +in an enclosing scope can only be found using argument dependent +lookup. This option causes friends to be injected as they were in +earlier releases. +.Sp +This option is for compatibility, and may be removed in a future +release of G++. +.IP "\fB\-fno\-elide\-constructors\fR" 4 .IX Item "-fno-elide-constructors" The \*(C+ standard allows an implementation to omit creating a temporary which is only used to initialize another object of the same type. Specifying this option disables that optimization, and forces G++ to 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" -Don't check for violation of exception specifications at runtime. This -option violates the \*(C+ standard, but may be useful for reducing code -size in production builds, much like defining \fB\s-1NDEBUG\s0\fR. The compiler -will still optimize based on the exception specifications. -.Ip "\fB\-fexternal-templates\fR" 4 -.IX Item "-fexternal-templates" -Cause \fB#pragma interface\fR and \fBimplementation\fR to apply to -template instantiation; template instances are emitted or not according -to the location of the template definition. -.Sp -This option is deprecated. -.Ip "\fB\-falt-external-templates\fR" 4 -.IX Item "-falt-external-templates" -Similar to \fB\-fexternal-templates\fR, but template instances are -emitted or not according to the place where they are first instantiated. -.Sp -This option is deprecated. -.Ip "\fB\-ffor-scope\fR" 4 +Don't generate code to check for violation of exception specifications +at runtime. This option violates the \*(C+ standard, but may be useful +for reducing code size in production builds, much like defining +\&\fB\s-1NDEBUG\s0\fR. This does not give user code permission to throw +exceptions in violation of the exception specifications; the compiler +will still optimize based on the specifications, so throwing an +unexpected exception will result in undefined behavior. +.IP "\fB\-ffor\-scope\fR" 4 .IX Item "-ffor-scope" .PD 0 -.Ip "\fB\-fno-for-scope\fR" 4 +.IP "\fB\-fno\-for\-scope\fR" 4 .IX Item "-fno-for-scope" .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, 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, as was the case in old versions of G++, and other (traditional) implementations of \*(C+. @@ -1326,97 +1757,157 @@ implementations of \*(C+. The default if neither flag is given to follow the standard, but to allow and give a warning for old-style code that would 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" 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. -\&\fB\-ansi\fR implies \fB\-fno-gnu-keywords\fR. -.Ip "\fB\-fno-implicit-templates\fR" 4 +\&\fB\-ansi\fR implies \fB\-fno\-gnu\-keywords\fR. +.IP "\fB\-fno\-implicit\-templates\fR" 4 .IX Item "-fno-implicit-templates" Never emit code for non-inline templates which are instantiated 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" Don't emit code for implicit instantiations of inline templates, either. The default is to handle inlines differently so that compiles with and 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" To save space, do not emit out-of-line copies of inline functions controlled by \fB#pragma implementation\fR. This will cause linker 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" 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. -.Ip "\fB\-fno-nonansi-builtins\fR" 4 +.IP "\fB\-fno\-nonansi\-builtins\fR" 4 .IX Item "-fno-nonansi-builtins" 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, \&\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" 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 synonyms as keywords. -.Ip "\fB\-fno-optional-diags\fR" 4 +.IP "\fB\-fno\-optional\-diags\fR" 4 .IX Item "-fno-optional-diags" 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 a name having multiple meanings within a class. -.Ip "\fB\-fpermissive\fR" 4 +.IP "\fB\-fpermissive\fR" 4 .IX Item "-fpermissive" -Downgrade messages about nonconformant code from errors to warnings. By -default, G++ effectively sets \fB\-pedantic-errors\fR without -\&\fB\-pedantic\fR; this option reverses that. This behavior and this -option are superseded by \fB\-pedantic\fR, which works as it does for \s-1GNU\s0 C. -.Ip "\fB\-frepo\fR" 4 +Downgrade some diagnostics about nonconformant code from errors to +warnings. Thus, using \fB\-fpermissive\fR will allow some +nonconforming code to compile. +.IP "\fB\-frepo\fR" 4 .IX Item "-frepo" Enable automatic template instantiation at link time. This option also -implies \fB\-fno-implicit-templates\fR. -.Ip "\fB\-fno-rtti\fR" 4 +implies \fB\-fno\-implicit\-templates\fR. +.IP "\fB\-fno\-rtti\fR" 4 .IX Item "-fno-rtti" Disable generation of information about every class with virtual functions for use by the \*(C+ runtime type identification features (\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 exception handling uses the same information, but it will generate it as -needed. -.Ip "\fB\-fstats\fR" 4 +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 +unambiguous base classes. +.IP "\fB\-fstats\fR" 4 .IX Item "-fstats" Emit statistics about front-end processing at the end of the compilation. 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" Set the maximum instantiation depth for template classes to \fIn\fR. A limit on the template instantiation depth is needed to detect endless recursions during template class instantiation. \s-1ANSI/ISO\s0 \*(C+ conforming programs must not rely on a maximum depth greater than 17. -.Ip "\fB\-fuse-cxa-atexit\fR" 4 +.IP "\fB\-fno\-threadsafe\-statics\fR" 4 +.IX Item "-fno-threadsafe-statics" +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 +option to reduce code size slightly in code that doesn't need to be +thread-safe. +.IP "\fB\-fuse\-cxa\-atexit\fR" 4 .IX Item "-fuse-cxa-atexit" 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. This option is required for fully standards-compliant handling of static destructors, but will only work if your C library supports \&\f(CW\*(C`_\|_cxa_atexit\*(C'\fR. -.Ip "\fB\-fvtable-gc\fR" 4 -.IX Item "-fvtable-gc" -Emit special relocations for vtables and virtual function references -so that the linker can identify unused virtual functions and zero out -vtable slots that refer to them. This is most useful with -\&\fB\-ffunction-sections\fR and \fB\-Wl,\-\-gc-sections\fR, in order to -also discard the functions themselves. -.Sp -This optimization requires \s-1GNU\s0 as and \s-1GNU\s0 ld. Not all systems support -this option. \fB\-Wl,\-\-gc-sections\fR is ignored without \fB\-static\fR. -.Ip "\fB\-fno-weak\fR" 4 +.IP "\fB\-fno\-use\-cxa\-get\-exception\-ptr\fR" 4 +.IX Item "-fno-use-cxa-get-exception-ptr" +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 +if the runtime routine is not available. +.IP "\fB\-fvisibility\-inlines\-hidden\fR" 4 +.IX Item "-fvisibility-inlines-hidden" +This switch declares that the user does not attempt to compare +pointers to inline methods where the addresses of the two functions +were taken in different shared objects. +.Sp +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 +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 +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. +.Sp +The behavior of this switch is not quite the same as marking the +methods as hidden directly, because it does not affect static variables +local to the function or cause the compiler to deduce that +the function is defined in only one shared object. +.Sp +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 +compare pointers to a particular inline method, you might mark it as +having default visibility. Marking the enclosing class with explicit +visibility will have no effect. +.Sp +Explicitly instantiated inline methods are unaffected by this option +as their linkage might otherwise cross a shared library boundary. +.IP "\fB\-fvisibility\-ms\-compat\fR" 4 +.IX Item "-fvisibility-ms-compat" +This flag attempts to use visibility settings to make \s-1GCC\s0's \*(C+ +linkage model compatible with that of Microsoft Visual Studio. +.Sp +The flag makes these changes to \s-1GCC\s0's linkage model: +.RS 4 +.IP "1." 4 +It sets the default visibility to \f(CW\*(C`hidden\*(C'\fR, like +\&\fB\-fvisibility=hidden\fR. +.IP "2." 4 +Types, but not their members, are not hidden by default. +.IP "3." 4 +The One Definition Rule is relaxed for types without explicit +visibility specifications which are defined in more than one different +shared object: those declarations are permitted if they would have +been permitted when this option was not used. +.RE +.RS 4 +.Sp +In new code it is better to use \fB\-fvisibility=hidden\fR and +export those classes which are intended to be externally visible. +Unfortunately it is possible for code to rely, perhaps accidentally, +on the Visual Studio behavior. +.Sp +Among the consequences of these changes are that static data members +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; +and that pointers to function members defined in different shared +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. +.RE +.IP "\fB\-fno\-weak\fR" 4 .IX Item "-fno-weak" 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 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 be removed in a future release of G++. -.Ip "\fB\-nostdinc++\fR" 4 +.IP "\fB\-nostdinc++\fR" 4 .IX Item "-nostdinc++" Do not search for header files in the standard directories specific to \&\*(C+, but do still search the other standard directories. (This option @@ -1424,17 +1915,17 @@ is used when building the \*(C+ library.) .PP In addition, these optimization, warning, and code generation options 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" Do not assume \fBinline\fR for functions defined inside a class scope. Note that these functions will have linkage like inline functions; they just won't be inlined by default. -.Ip "\fB\-Wabi\fR (\*(C+ only)" 4 -.IX Item "-Wabi ( only)" +.IP "\fB\-Wabi\fR (C, Objective-C, \*(C+ and Objective\-\*(C+ only)" 4 +.IX Item "-Wabi (C, Objective-C, and Objective- only)" 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 -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 cases where warnings are emitted even though the code that is generated will be compatible. @@ -1443,9 +1934,9 @@ 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 compatible with code generated by other compilers. .Sp -The known incompatibilites at this point include: +The known incompatibilities at this point include: .RS 4 -.Ip "\(bu" 4 +.IP "\(bu" 4 Incorrect handling of tail-padding for bit-fields. G++ may attempt to pack data into the same byte as a base class. For example: .Sp @@ -1453,12 +1944,13 @@ pack data into the same byte as a base class. For example: \& struct A { virtual void f(); int f1 : 1; }; \& struct B : public A { int f2 : 1; }; .Ve +.Sp 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 byte size on your platform; that will cause G++ and other compilers to 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 tail padding when laying out virtual bases. For example: .Sp @@ -1467,25 +1959,86 @@ tail padding when laying out virtual bases. For example: \& struct B { B(); char c2; }; \& struct C : public A, public virtual B {}; .Ve +.Sp 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 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 compilers to layout \f(CW\*(C`C\*(C'\fR identically. +.IP "\(bu" 4 +Incorrect handling of bit-fields with declared widths greater than that +of their underlying types, when the bit-fields appear in a union. For +example: +.Sp +.Vb 1 +\& union U { int i : 4096; }; +.Ve +.Sp +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. +.IP "\(bu" 4 +Empty classes can be placed at incorrect offsets. For example: +.Sp +.Vb 1 +\& struct A {}; +\& +\& struct B { +\& A a; +\& virtual void f (); +\& }; +\& +\& struct C : public B, public A {}; +.Ve +.Sp +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 +\&\f(CW\*(C`A\*(C'\fR data member of \f(CW\*(C`B\*(C'\fR is already at offset zero. +.IP "\(bu" 4 +Names of template functions whose types involve \f(CW\*(C`typename\*(C'\fR or +template template parameters can be mangled incorrectly. +.Sp +.Vb 2 +\& template +\& void f(typename Q::X) {} +\& +\& template