[7152faa] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[b06ca36] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[673b0d8] | 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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[6a82dd9] | 7 |
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[81fd230] | 8 | <sect1 id="ch-system-gcc" role="wrap">
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[6a82dd9] | 9 | <?dbhtml filename="gcc.html"?>
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| 10 |
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[e747759] | 11 | <sect1info condition="script">
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| 12 | <productname>gcc</productname>
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| 13 | <productnumber>&gcc-version;</productnumber>
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| 14 | <address>&gcc-url;</address>
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| 15 | </sect1info>
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| 16 |
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[6a82dd9] | 17 | <title>GCC-&gcc-version;</title>
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| 18 |
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| 19 | <indexterm zone="ch-system-gcc">
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| 20 | <primary sortas="a-GCC">GCC</primary>
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| 21 | </indexterm>
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| 22 |
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| 23 | <sect2 role="package">
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| 24 | <title/>
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[6370fa6] | 25 |
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[6a82dd9] | 26 | <para>The GCC package contains the GNU compiler collection, which includes
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| 27 | the C and C++ compilers.</para>
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[673b0d8] | 28 |
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[6a82dd9] | 29 | <segmentedlist>
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| 30 | <segtitle>&buildtime;</segtitle>
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| 31 | <segtitle>&diskspace;</segtitle>
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[5888299] | 32 |
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[6a82dd9] | 33 | <seglistitem>
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[6dfcfecc] | 34 | <seg>&gcc-fin-sbu;</seg>
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| 35 | <seg>&gcc-fin-du;</seg>
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[6a82dd9] | 36 | </seglistitem>
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| 37 | </segmentedlist>
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[3554fa3a] | 38 |
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[6a82dd9] | 39 | </sect2>
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| 40 |
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| 41 | <sect2 role="installation">
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| 42 | <title>Installation of GCC</title>
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[481b2e05] | 43 | <!--
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[a04b3d39] | 44 | <para>At first, fix an issue breaking
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| 45 | <filename class="libraryfile">libasan.a</filename> building this package
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[51e4ab2] | 46 | with Glibc-2.34 or later:</para>
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[a04b3d39] | 47 |
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| 48 | <screen><userinput remap="pre">sed -e '/static.*SIGSTKSZ/d' \
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| 49 | -e 's/return kAltStackSize/return SIGSTKSZ * 4/' \
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| 50 | -i libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp</userinput></screen>
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[481b2e05] | 51 | -->
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[f2af13d] | 52 | <!--
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[1b11115] | 53 | <para>First fix a problem with the latest version of glibc:</para>
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| 54 |
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| 55 | <screen><userinput remap="pre">patch -Np1 -i ../&gcc-upstream-fixes-patch;</userinput></screen>
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[f2af13d] | 56 | -->
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[ed3be61] | 57 | <para>If building on x86_64, change the default directory name for 64-bit
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[6dfcfecc] | 58 | libraries to <quote>lib</quote>:</para>
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[be3d9f3] | 59 |
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[b3f1ebb3] | 60 | <screen arch="default"><userinput remap="pre">case $(uname -m) in
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[be3d9f3] | 61 | x86_64)
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| 62 | sed -e '/m64=/s/lib64/lib/' \
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| 63 | -i.orig gcc/config/i386/t-linux64
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| 64 | ;;
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| 65 | esac</userinput></screen>
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| 66 |
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[fd48baa] | 67 | <para arch="ml_32,ml_x32,ml_all">Change the default directory name for 64-bit
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[b3f1ebb3] | 68 | libraries to <quote>lib</quote>:</para>
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| 69 |
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[6dfcfecc] | 70 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="pre">sed -e '/m64=/s/lib64/lib/' \
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[0ebda11] | 71 | -e '/m32=/s/m32=.*/m32=..\/lib32$(call if_multiarch,:i386-linux-gnu)/' \
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[9c0c3a0] | 72 | -i.orig gcc/config/i386/t-linux64</userinput></screen>
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[b3f1ebb3] | 73 |
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[f1dd547] | 74 | <para>The GCC documentation recommends building GCC in a dedicated build directory:</para>
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[73aedd1d] | 75 |
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[f1dd547] | 76 | <screen><userinput remap="pre">mkdir -v build
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| 77 | cd build</userinput></screen>
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[73aedd1d] | 78 |
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[6a82dd9] | 79 | <para>Prepare GCC for compilation:</para>
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[73aedd1d] | 80 |
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[6dfcfecc] | 81 | <screen arch="default"><userinput remap="configure">../configure --prefix=/usr \
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| 82 | LD=ld \
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[f1dd547] | 83 | --enable-languages=c,c++ \
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[0611f706] | 84 | --enable-default-pie \
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| 85 | --enable-default-ssp \
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[6dfcfecc] | 86 | --disable-multilib \
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[f1dd547] | 87 | --disable-bootstrap \
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[53363494] | 88 | --disable-fixincludes \
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[6dfcfecc] | 89 | --with-system-zlib</userinput></screen>
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| 90 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure"
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| 91 | arch="ml_32" >mlist=m64,m32</userinput><userinput remap="configure"
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| 92 | arch="ml_x32">mlist=m64,mx32</userinput><userinput remap="configure"
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| 93 | arch="ml_all">mlist=m64,m32,mx32</userinput>
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| 94 | <userinput remap="configure">../configure --prefix=/usr \
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| 95 | LD=ld \
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| 96 | --enable-languages=c,c++ \
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[1835fca] | 97 | --enable-default-pie \
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| 98 | --enable-default-ssp \
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[6dfcfecc] | 99 | --enable-multilib \
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| 100 | --with-multilib-list=$mlist \
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| 101 | --disable-bootstrap \
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[5c9689c] | 102 | --disable-fixincludes \
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[6dfcfecc] | 103 | --with-system-zlib</userinput></screen>
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| 104 |
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[30f3041] | 105 | <para>GCC supports seven different computer languages, but the
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| 106 | prerequisites for most of them have not yet been installed. See the
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[6dfcfecc] | 107 | <ulink url="&blfs-book;general/gcc.html">BLFS Book GCC page</ulink>
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[93756f6] | 108 | for instructions on how to build all of GCC's supported languages.</para>
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[182d5d3] | 109 |
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[ae4d45a] | 110 | <variablelist>
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[0cba512d] | 111 | <title>The meaning of the new configure parameters:</title>
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[cde2ae7] | 112 |
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[ff0f063] | 113 | <varlistentry>
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[6dfcfecc] | 114 | <term><parameter>LD=ld</parameter></term>
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[ff0f063] | 115 | <listitem>
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[30f3041] | 116 | <para>This parameter makes the configure script use the ld program installed
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| 117 | by the Binutils package built earlier in this chapter, rather than
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[6dfcfecc] | 118 | the cross-built version which would otherwise be used.</para>
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[ff0f063] | 119 | </listitem>
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| 120 | </varlistentry>
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[6dfcfecc] | 121 |
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[9781ec5] | 122 | <varlistentry>
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| 123 | <term><parameter>--disable-fixincludes</parameter></term>
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| 124 | <listitem>
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| 125 | <para>By default, during the installation of GCC some system
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| 126 | headers would be <quote>fixed</quote> to be used with GCC. This
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[fb5f62b] | 127 | is not necessary for a modern Linux system, and potentially
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[9781ec5] | 128 | harmful if a package is reinstalled after installing GCC. This
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| 129 | switch prevents GCC from <quote>fixing</quote> the headers.</para>
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| 130 | </listitem>
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| 131 | </varlistentry>
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| 132 |
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[ae4d45a] | 133 | <varlistentry>
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| 134 | <term><parameter>--with-system-zlib</parameter></term>
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| 135 | <listitem>
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| 136 | <para>This switch tells GCC to link to the system installed copy of
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[30f3041] | 137 | the Zlib library, rather than its own internal copy.</para>
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[ae4d45a] | 138 | </listitem>
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| 139 | </varlistentry>
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| 140 | </variablelist>
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| 141 |
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[c10a327] | 142 | <note>
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| 143 | <anchor id="pie-ssp-info" xreflabel="note on PIE and SSP"/>
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[1bade3f] | 144 | <para>
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[30f3041] | 145 | PIE (position-independent executables) are
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[e502de1] | 146 | binary programs that can be loaded anywhere in memory. Without PIE,
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| 147 | the security feature named ASLR (Address Space Layout Randomization)
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[30f3041] | 148 | can be applied for the shared libraries, but not for the executables
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| 149 | themselves. Enabling PIE allows ASLR for the executables in addition to
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[e502de1] | 150 | the shared libraries, and mitigates some attacks based on fixed
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| 151 | addresses of sensitive code or data in the executables.
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[1bade3f] | 152 | </para>
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| 153 | <para>
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| 154 | SSP (Stack Smashing Protection) is a technique to ensure
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[30f3041] | 155 | that the parameter stack is not corrupted. Stack corruption can,
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| 156 | for example, alter the return address of a subroutine,
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| 157 | thus transferring control to some dangerous code
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[e502de1] | 158 | (existing in the program or shared libraries, or injected by the
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[30f3041] | 159 | attacker somehow).
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[1bade3f] | 160 | </para>
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| 161 | </note>
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| 162 |
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[6a82dd9] | 163 | <para>Compile the package:</para>
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[73aedd1d] | 164 |
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[0445a3d] | 165 | <screen><userinput remap="make">make</userinput></screen>
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[73aedd1d] | 166 |
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[6a82dd9] | 167 | <important>
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| 168 | <para>In this section, the test suite for GCC is considered
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[30f3041] | 169 | important, but it takes a long time. First-time builders are
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| 170 | encouraged to run the test suite. The time to run the tests can be
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| 171 | reduced significantly by adding -jx to the <command>make -k check</command> command below,
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| 172 | where x is the number of CPU cores on your system.</para>
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[6a82dd9] | 173 | </important>
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[81fd230] | 174 |
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[6dfcfecc] | 175 | <para>One set of tests in the GCC test suite is known to exhaust the default
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| 176 | stack, so increase the stack size prior to running the tests:</para>
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[4e48f56e] | 177 |
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[2efa44a] | 178 | <screen><userinput remap="test">ulimit -s 32768</userinput></screen>
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[4e48f56e] | 179 |
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[76db8d6] | 180 | <para>Test the results as a non-privileged user, but do not stop at errors:</para>
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| 181 |
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[9c73d911] | 182 | <screen><userinput remap="test">chown -R tester .
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[8d4f212] | 183 | su tester -c "PATH=$PATH make -k check"</userinput></screen>
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[73aedd1d] | 184 |
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[30f3041] | 185 | <para>To extract a summary of the test suite results, run:</para>
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[9278974d] | 186 |
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[f1dd547] | 187 | <screen><userinput remap="test">../contrib/test_summary</userinput></screen>
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[9278974d] | 188 |
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[30f3041] | 189 | <para>To filter out only the summaries, pipe the output through
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[9278974d] | 190 | <userinput>grep -A7 Summ</userinput>.</para>
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| 191 |
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| 192 | <para>Results can be compared with those located at <ulink
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[98e7ac4] | 193 | url="&test-results;"/> and
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[b30de8f] | 194 | <ulink url="https://gcc.gnu.org/ml/gcc-testresults/"/>.</para>
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[9278974d] | 195 |
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[5f2ba8c] | 196 | <para>
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| 197 | Eight gcc tests (out of over 185,000):
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| 198 | <!-- https://gcc.gnu.org/PR106375 --><filename>pr56837.c</filename>
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| 199 | and seven tests in the <filename class='directory'>analyzer</filename>
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| 200 | directory are known to fail.
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[28614cdd] | 201 |
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[5f2ba8c] | 202 | <!-- https://gcc.gnu.org/PR109353 -->
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| 203 | One libstdc++ test (out of over 15000), <filename>copy.cc</filename>, is
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| 204 | known to fail.
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[28614cdd] | 205 |
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[5f2ba8c] | 206 | For g++, 21 tests (out of approximately 250,000): 14
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| 207 | <quote>AddressSanitizer*</quote>
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| 208 | tests and 7 <filename>interception-malloc-test-1.C</filename> tests, are
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| 209 | known to fail.
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[28614cdd] | 210 |
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[6d4ba5f] | 211 | Additionally, several tests in the
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| 212 | <filename class='directory'>vect</filename> directory are known to fail
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| 213 | if the hardware does not support AVX.</para>
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[5f2ba8c] | 214 |
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[9278974d] | 215 | <para>A few unexpected failures cannot always be avoided. The GCC developers
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[0238d49] | 216 | are usually aware of these issues, but have not resolved them yet.
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[9278974d] | 217 | Unless the test results are vastly different from those at the above URL,
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| 218 | it is safe to continue.</para>
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[73aedd1d] | 219 |
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[3a72ffa] | 220 | <para>Install the package:</para>
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[73aedd1d] | 221 |
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[3a72ffa] | 222 | <screen><userinput remap="install">make install</userinput></screen>
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[1daca67] | 223 |
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| 224 | <para>The GCC build directory is owned by <systemitem class="username">
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[30f3041] | 225 | tester</systemitem> now, and the ownership of the installed header
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| 226 | directory (and its content) is incorrect. Change the ownership to the
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[1daca67] | 227 | <systemitem class="username">root</systemitem> user and group:</para>
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| 228 |
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| 229 | <screen><userinput remap="install">chown -v -R root:root \
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[9c43803] | 230 | /usr/lib/gcc/$(gcc -dumpmachine)/&gcc-version;/include{,-fixed}</userinput></screen>
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[73aedd1d] | 231 |
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[60b23a6f] | 232 | <para>Create a symlink required by the <ulink
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[b30de8f] | 233 | url="https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s09.html">FHS</ulink>
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[60b23a6f] | 234 | for "historical" reasons.</para>
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[73aedd1d] | 235 |
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[9c3ce2a] | 236 | <screen><userinput remap="install">ln -svr /usr/bin/cpp /usr/lib</userinput></screen>
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[0fe3bb0] | 237 |
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[6a82dd9] | 238 | <para>Many packages use the name <command>cc</command> to call the C
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[0fe3bb0] | 239 | compiler. We've already created <command>cc</command> as a symlink in
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| 240 | <xref linkend='ch-tools-gcc-pass2'/>, create its man page as a symlink
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| 241 | as well:</para>
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| 242 |
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| 243 | <screen><userinput remap="install">ln -sv gcc.1 /usr/share/man/man1/cc.1</userinput></screen>
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[1ba726f] | 244 |
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[6206f72] | 245 | <para>Add a compatibility symlink to enable building programs with
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[d672ab7] | 246 | Link Time Optimization (LTO):</para>
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[6206f72] | 247 |
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[9da9d014] | 248 | <screen><userinput remap="install">ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so \
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[040ecb6] | 249 | /usr/lib/bfd-plugins/</userinput></screen>
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[6206f72] | 250 |
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[09f1daf] | 251 | <para>Now that our final toolchain is in place, it is important to again ensure
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| 252 | that compiling and linking will work as expected. We do this by performing
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[6dfcfecc] | 253 | some sanity checks:</para>
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[09f1daf] | 254 |
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[a4f63e4] | 255 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 256 | cc dummy.c -v -Wl,--verbose &> dummy.log
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| 257 | readelf -l a.out | grep ': /lib'</userinput></screen>
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[09f1daf] | 258 |
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[a4f63e4] | 259 | <para>There should be no errors,
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| 260 | and the output of the last command will be (allowing for
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| 261 | platform-specific differences in the dynamic linker name):</para>
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[09f1daf] | 262 |
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[a4f63e4] | 263 | <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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[09f1daf] | 264 |
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[30f3041] | 265 | <para>Now make sure that we're set up to use the correct start files:</para>
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[09f1daf] | 266 |
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[0d487e0] | 267 | <screen><userinput>grep -E -o '/usr/lib.*/S?crt[1in].*succeeded' dummy.log</userinput></screen>
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[09f1daf] | 268 |
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[a4f63e4] | 269 | <para>The output of the last command should be:</para>
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[09f1daf] | 270 |
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[0d487e0] | 271 | <screen><computeroutput>/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/Scrt1.o succeeded
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[98e7ac4] | 272 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crti.o succeeded
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| 273 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crtn.o succeeded</computeroutput></screen>
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[09f1daf] | 274 |
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[6dfcfecc] | 275 | <para>Depending on your machine architecture, the above may differ slightly.
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| 276 | The difference will be the name of the directory
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[be3d9f3] | 277 | after <filename class="directory">/usr/lib/gcc</filename>. The important
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| 278 | thing to look for here is that <command>gcc</command> has found all three
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[5f7456b] | 279 | <filename>crt*.o</filename> files under the
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| 280 | <filename class="directory">/usr/lib</filename> directory.</para>
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[6e88633] | 281 |
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[a4f63e4] | 282 | <para>Verify that the compiler is searching for the correct header
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| 283 | files:</para>
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[09f1daf] | 284 |
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[041c8f67] | 285 | <screen><userinput>grep -B4 '^ /usr/include' dummy.log</userinput></screen>
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[e9a652b] | 286 |
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[a4f63e4] | 287 | <para>This command should return the following output:</para>
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[09f1daf] | 288 |
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[e9a652b] | 289 | <screen><computeroutput>#include <...> search starts here:
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[98e7ac4] | 290 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include
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[c528e3a] | 291 | /usr/local/include
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[98e7ac4] | 292 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include-fixed
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[e9a652b] | 293 | /usr/include</computeroutput></screen>
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| 294 |
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[6dfcfecc] | 295 | <para>Again, the directory named after your target triplet may be
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| 296 | different than the above, depending on your system architecture.</para>
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[3f39abf3] | 297 |
|
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[a4f63e4] | 298 | <para>Next, verify that the new linker is being used with the correct search paths:</para>
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[09f1daf] | 299 |
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[a4f63e4] | 300 | <screen><userinput>grep 'SEARCH.*/usr/lib' dummy.log |sed 's|; |\n|g'</userinput></screen>
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[09f1daf] | 301 |
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[a4f63e4] | 302 | <para>References to paths that have components with '-linux-gnu' should
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| 303 | be ignored, but otherwise the output of the last command should be:</para>
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[09f1daf] | 304 |
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[98e7ac4] | 305 | <screen><computeroutput>SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
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| 306 | SEARCH_DIR("/usr/local/lib64")
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| 307 | SEARCH_DIR("/lib64")
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| 308 | SEARCH_DIR("/usr/lib64")
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| 309 | SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
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[e9a652b] | 310 | SEARCH_DIR("/usr/local/lib")
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| 311 | SEARCH_DIR("/lib")
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[6e88633] | 312 | SEARCH_DIR("/usr/lib");</computeroutput></screen>
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| 313 |
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[f0cbef54] | 314 | <para arch="default">A 32-bit system may use a few other directories. For example, here
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[6dfcfecc] | 315 | is the output from an i686 machine:</para>
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[6e88633] | 316 |
|
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[6dfcfecc] | 317 | <!-- not using entities here as the dir names has nothing to do with multilib -->
|
---|
[b3f1ebb3] | 318 | <screen arch="default"><computeroutput>SEARCH_DIR("/usr/i686-pc-linux-gnu/lib32")
|
---|
[98e7ac4] | 319 | SEARCH_DIR("/usr/local/lib32")
|
---|
| 320 | SEARCH_DIR("/lib32")
|
---|
| 321 | SEARCH_DIR("/usr/lib32")
|
---|
| 322 | SEARCH_DIR("/usr/i686-pc-linux-gnu/lib")
|
---|
[6e88633] | 323 | SEARCH_DIR("/usr/local/lib")
|
---|
| 324 | SEARCH_DIR("/lib")
|
---|
[e9a652b] | 325 | SEARCH_DIR("/usr/lib");</computeroutput></screen>
|
---|
| 326 |
|
---|
[a4f63e4] | 327 | <para>Next make sure that we're using the correct libc:</para>
|
---|
[09f1daf] | 328 |
|
---|
[a4f63e4] | 329 | <screen><userinput>grep "/lib.*/libc.so.6 " dummy.log</userinput></screen>
|
---|
[09f1daf] | 330 |
|
---|
[a4f63e4] | 331 | <para>The output of the last command should be:</para>
|
---|
[09f1daf] | 332 |
|
---|
[a4f63e4] | 333 | <screen><computeroutput>attempt to open /usr/lib/libc.so.6 succeeded</computeroutput></screen>
|
---|
[09f1daf] | 334 |
|
---|
[a4f63e4] | 335 | <para>Make sure GCC is using the correct dynamic linker:</para>
|
---|
[09f1daf] | 336 |
|
---|
[a4f63e4] | 337 | <screen><userinput>grep found dummy.log</userinput></screen>
|
---|
[09f1daf] | 338 |
|
---|
[a4f63e4] | 339 | <para>The output of the last command should be (allowing for
|
---|
| 340 | platform-specific differences in dynamic linker name):</para>
|
---|
[09f1daf] | 341 |
|
---|
[a4f63e4] | 342 | <screen><computeroutput>found ld-linux-x86-64.so.2 at /usr/lib/ld-linux-x86-64.so.2</computeroutput></screen>
|
---|
[09f1daf] | 343 |
|
---|
[a4f63e4] | 344 | <para>If the output does not appear as shown above or is not received
|
---|
| 345 | at all, then something is seriously wrong. Investigate and retrace the
|
---|
| 346 | steps to find out where the problem is and correct it. <!--The most likely
|
---|
| 347 | reason is that something went wrong with the specs file adjustment.--> Any
|
---|
[30f3041] | 348 | issues should be resolved before continuing with the process.</para>
|
---|
[6a82dd9] | 349 |
|
---|
[a4f63e4] | 350 | <para>Once everything is working correctly, clean up the test files:</para>
|
---|
[e9a652b] | 351 |
|
---|
[a4f63e4] | 352 | <screen><userinput>rm -v dummy.c a.out dummy.log</userinput></screen>
|
---|
[e9a652b] | 353 |
|
---|
[970a126] | 354 | <para>Finally, move a misplaced file:</para>
|
---|
[39ec01c] | 355 |
|
---|
[970a126] | 356 | <screen><userinput remap="install">mkdir -pv /usr/share/gdb/auto-load/usr/lib
|
---|
[6dfcfecc] | 357 | mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
|
---|
[39ec01c] | 358 |
|
---|
[6a82dd9] | 359 | </sect2>
|
---|
| 360 |
|
---|
| 361 | <sect2 id="contents-gcc" role="content">
|
---|
| 362 | <title>Contents of GCC</title>
|
---|
| 363 |
|
---|
| 364 | <segmentedlist>
|
---|
| 365 | <segtitle>Installed programs</segtitle>
|
---|
| 366 | <segtitle>Installed libraries</segtitle>
|
---|
[fe05b08] | 367 | <segtitle>Installed directories</segtitle>
|
---|
[6a82dd9] | 368 |
|
---|
| 369 | <seglistitem>
|
---|
[2ca8941] | 370 | <seg>c++, cc (link to gcc), cpp, g++, gcc,
|
---|
[e5b4b3f] | 371 | gcc-ar, gcc-nm, gcc-ranlib, gcov, gcov-dump, gcov-tool,
|
---|
| 372 | and lto-dump</seg>
|
---|
[e0901b3] | 373 |
|
---|
[78cc3be] | 374 | <seg>libasan.{a,so}, libatomic.{a,so}, libcc1.so, libgcc.a, libgcc_eh.a,
|
---|
[465ada7] | 375 | libgcc_s.so, libgcov.a, libgomp.{a,so}, libhwasan.{a,so}, libitm.{a,so},
|
---|
[78cc3be] | 376 | liblsan.{a,so}, liblto_plugin.so,
|
---|
| 377 | libquadmath.{a,so}, libssp.{a,so}, libssp_nonshared.a,
|
---|
[465ada7] | 378 | libstdc++.{a,so}, libstdc++exp.a, libstdc++fs.a, libsupc++.a, libtsan.{a,so},
|
---|
[78cc3be] | 379 | and libubsan.{a,so}</seg>
|
---|
[2ca8941] | 380 |
|
---|
[d672ab7] | 381 | <seg>/usr/include/c++, /usr/lib/gcc, /usr/libexec/gcc, and
|
---|
[4e8a532] | 382 | /usr/share/gcc-&gcc-version;</seg>
|
---|
[6a82dd9] | 383 | </seglistitem>
|
---|
| 384 | </segmentedlist>
|
---|
| 385 |
|
---|
| 386 | <variablelist>
|
---|
| 387 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
---|
| 388 | <?dbfo list-presentation="list"?>
|
---|
| 389 | <?dbhtml list-presentation="table"?>
|
---|
| 390 |
|
---|
[75128571] | 391 | <varlistentry id="c">
|
---|
| 392 | <term><command>c++</command></term>
|
---|
| 393 | <listitem>
|
---|
| 394 | <para>The C++ compiler</para>
|
---|
| 395 | <indexterm zone="ch-system-gcc c">
|
---|
| 396 | <primary sortas="b-c++">c++</primary>
|
---|
| 397 | </indexterm>
|
---|
| 398 | </listitem>
|
---|
| 399 | </varlistentry>
|
---|
| 400 |
|
---|
[6a82dd9] | 401 | <varlistentry id="cc">
|
---|
| 402 | <term><command>cc</command></term>
|
---|
| 403 | <listitem>
|
---|
| 404 | <para>The C compiler</para>
|
---|
| 405 | <indexterm zone="ch-system-gcc cc">
|
---|
| 406 | <primary sortas="b-cc">cc</primary>
|
---|
| 407 | </indexterm>
|
---|
| 408 | </listitem>
|
---|
| 409 | </varlistentry>
|
---|
| 410 |
|
---|
| 411 | <varlistentry id="cpp">
|
---|
| 412 | <term><command>cpp</command></term>
|
---|
| 413 | <listitem>
|
---|
| 414 | <para>The C preprocessor; it is used by the compiler to expand the
|
---|
[30f3041] | 415 | #include, #define, and similar directives in the source files</para>
|
---|
[6a82dd9] | 416 | <indexterm zone="ch-system-gcc cpp">
|
---|
| 417 | <primary sortas="b-cpp">cpp</primary>
|
---|
| 418 | </indexterm>
|
---|
| 419 | </listitem>
|
---|
| 420 | </varlistentry>
|
---|
| 421 |
|
---|
| 422 | <varlistentry id="g">
|
---|
| 423 | <term><command>g++</command></term>
|
---|
| 424 | <listitem>
|
---|
| 425 | <para>The C++ compiler</para>
|
---|
| 426 | <indexterm zone="ch-system-gcc g">
|
---|
| 427 | <primary sortas="b-g++">g++</primary>
|
---|
| 428 | </indexterm>
|
---|
| 429 | </listitem>
|
---|
| 430 | </varlistentry>
|
---|
| 431 |
|
---|
| 432 | <varlistentry id="gcc">
|
---|
| 433 | <term><command>gcc</command></term>
|
---|
| 434 | <listitem>
|
---|
| 435 | <para>The C compiler</para>
|
---|
| 436 | <indexterm zone="ch-system-gcc gcc">
|
---|
| 437 | <primary sortas="b-gcc">gcc</primary>
|
---|
| 438 | </indexterm>
|
---|
| 439 | </listitem>
|
---|
| 440 | </varlistentry>
|
---|
| 441 |
|
---|
[e0901b3] | 442 | <varlistentry id="gcc-ar">
|
---|
| 443 | <term><command>gcc-ar</command></term>
|
---|
| 444 | <listitem>
|
---|
| 445 | <para>A wrapper around <command>ar</command> that adds a
|
---|
[afba93b] | 446 | plugin to the command line. This program is only used
|
---|
[edbeeb5] | 447 | to add "link time optimization" and is not useful with the
|
---|
[30f3041] | 448 | default build options.</para>
|
---|
[e0901b3] | 449 | <indexterm zone="ch-system-gcc gcc-ar">
|
---|
| 450 | <primary sortas="b-gcc-ar">gc-ar</primary>
|
---|
| 451 | </indexterm>
|
---|
| 452 | </listitem>
|
---|
| 453 | </varlistentry>
|
---|
| 454 |
|
---|
| 455 | <varlistentry id="gcc-nm">
|
---|
| 456 | <term><command>gcc-nm</command></term>
|
---|
| 457 | <listitem>
|
---|
| 458 | <para>A wrapper around <command>nm</command> that adds a
|
---|
[afba93b] | 459 | plugin to the command line. This program is only used
|
---|
[a885478] | 460 | to add "link time optimization" and is not useful with the
|
---|
[30f3041] | 461 | default build options.</para>
|
---|
[e0901b3] | 462 | <indexterm zone="ch-system-gcc gcc-nm">
|
---|
| 463 | <primary sortas="b-gcc-nm">gc-nm</primary>
|
---|
| 464 | </indexterm>
|
---|
| 465 | </listitem>
|
---|
| 466 | </varlistentry>
|
---|
| 467 |
|
---|
| 468 | <varlistentry id="gcc-ranlib">
|
---|
| 469 | <term><command>gcc-ranlib</command></term>
|
---|
| 470 | <listitem>
|
---|
| 471 | <para>A wrapper around <command>ranlib</command> that adds a
|
---|
[afba93b] | 472 | plugin to the command line. This program is only used
|
---|
[a885478] | 473 | to add "link time optimization" and is not useful with the
|
---|
[30f3041] | 474 | default build options.</para>
|
---|
[e0901b3] | 475 | <indexterm zone="ch-system-gcc gcc-ranlib">
|
---|
| 476 | <primary sortas="b-gcc-ranlib">gc-ranlib</primary>
|
---|
| 477 | </indexterm>
|
---|
| 478 | </listitem>
|
---|
| 479 | </varlistentry>
|
---|
[6a82dd9] | 480 |
|
---|
| 481 | <varlistentry id="gcov">
|
---|
| 482 | <term><command>gcov</command></term>
|
---|
| 483 | <listitem>
|
---|
| 484 | <para>A coverage testing tool; it is used to analyze programs to
|
---|
[30f3041] | 485 | determine where optimizations will have the greatest effect</para>
|
---|
[6a82dd9] | 486 | <indexterm zone="ch-system-gcc gcov">
|
---|
| 487 | <primary sortas="b-gcov">gcov</primary>
|
---|
| 488 | </indexterm>
|
---|
[4783efe] | 489 | </listitem>
|
---|
| 490 | </varlistentry>
|
---|
| 491 |
|
---|
[78cc3be] | 492 | <varlistentry id="gcov-dump">
|
---|
| 493 | <term><command>gcov-dump</command></term>
|
---|
| 494 | <listitem>
|
---|
| 495 | <para>Offline gcda and gcno profile dump tool</para>
|
---|
| 496 | <indexterm zone="ch-system-gcc gcov-dump">
|
---|
| 497 | <primary sortas="b-gcov-dump">gcov-dump</primary>
|
---|
| 498 | </indexterm>
|
---|
| 499 | </listitem>
|
---|
| 500 | </varlistentry>
|
---|
| 501 |
|
---|
| 502 | <varlistentry id="gcov-tool">
|
---|
| 503 | <term><command>gcov-tool</command></term>
|
---|
| 504 | <listitem>
|
---|
| 505 | <para>Offline gcda profile processing tool</para>
|
---|
| 506 | <indexterm zone="ch-system-gcc gcov-tool">
|
---|
| 507 | <primary sortas="b-gcov-tool">gcov-tool</primary>
|
---|
| 508 | </indexterm>
|
---|
| 509 | </listitem>
|
---|
| 510 | </varlistentry>
|
---|
| 511 |
|
---|
[e5b4b3f] | 512 | <varlistentry id="lto-dump">
|
---|
| 513 | <term><command>lto-dump</command></term>
|
---|
| 514 | <listitem>
|
---|
| 515 | <para>Tool for dumping object files produced by GCC with LTO
|
---|
| 516 | enabled</para>
|
---|
| 517 | <indexterm zone="ch-system-gcc lto-dump">
|
---|
| 518 | <primary sortas="b-lto-dump">lto-dump</primary>
|
---|
| 519 | </indexterm>
|
---|
| 520 | </listitem>
|
---|
| 521 | </varlistentry>
|
---|
| 522 |
|
---|
[4783efe] | 523 | <varlistentry id="libasan">
|
---|
[78cc3be] | 524 | <term><filename class="libraryfile">libasan</filename></term>
|
---|
[4783efe] | 525 | <listitem>
|
---|
| 526 | <para>The Address Sanitizer runtime library</para>
|
---|
| 527 | <indexterm zone="ch-system-gcc libasan">
|
---|
| 528 | <primary sortas="b-libasan">libasan</primary>
|
---|
| 529 | </indexterm>
|
---|
[6a82dd9] | 530 | </listitem>
|
---|
| 531 | </varlistentry>
|
---|
| 532 |
|
---|
[78cc3be] | 533 | <varlistentry id="libatomic">
|
---|
| 534 | <term><filename class="libraryfile">libatomic</filename></term>
|
---|
| 535 | <listitem>
|
---|
| 536 | <para>GCC atomic built-in runtime library</para>
|
---|
| 537 | <indexterm zone="ch-system-gcc libatomic">
|
---|
| 538 | <primary sortas="b-libatomic">libatomic</primary>
|
---|
| 539 | </indexterm>
|
---|
| 540 | </listitem>
|
---|
| 541 | </varlistentry>
|
---|
| 542 |
|
---|
| 543 | <varlistentry id="libcc1">
|
---|
| 544 | <term><filename class="libraryfile">libcc1</filename></term>
|
---|
| 545 | <listitem>
|
---|
[46b5c6b] | 546 | <para>A library that allows GDB to make use of GCC</para>
|
---|
[78cc3be] | 547 | <indexterm zone="ch-system-gcc libcc1">
|
---|
| 548 | <primary sortas="b-libcc1">libcc1</primary>
|
---|
| 549 | </indexterm>
|
---|
| 550 | </listitem>
|
---|
| 551 | </varlistentry>
|
---|
| 552 |
|
---|
[6a82dd9] | 553 | <varlistentry id="libgcc">
|
---|
| 554 | <term><filename class="libraryfile">libgcc</filename></term>
|
---|
| 555 | <listitem>
|
---|
| 556 | <para>Contains run-time support for <command>gcc</command></para>
|
---|
| 557 | <indexterm zone="ch-system-gcc libgcc">
|
---|
[afba93b] | 558 | <primary sortas="c-libgcc">libgcc</primary>
|
---|
[6a82dd9] | 559 | </indexterm>
|
---|
| 560 | </listitem>
|
---|
| 561 | </varlistentry>
|
---|
| 562 |
|
---|
[90aae6b] | 563 | <varlistentry id="libgcov">
|
---|
| 564 | <term><filename class="libraryfile">libgcov</filename></term>
|
---|
| 565 | <listitem>
|
---|
[30f3041] | 566 | <para>This library is linked into a program when GCC is instructed
|
---|
[90aae6b] | 567 | to enable profiling</para>
|
---|
| 568 | <indexterm zone="ch-system-gcc libgcov">
|
---|
| 569 | <primary sortas="c-libgcov">libgcov</primary>
|
---|
| 570 | </indexterm>
|
---|
| 571 | </listitem>
|
---|
| 572 | </varlistentry>
|
---|
| 573 |
|
---|
| 574 | <varlistentry id="libgomp">
|
---|
| 575 | <term><filename class="libraryfile">libgomp</filename></term>
|
---|
| 576 | <listitem>
|
---|
| 577 | <para>GNU implementation of the OpenMP API for multi-platform
|
---|
| 578 | shared-memory parallel programming in C/C++ and Fortran</para>
|
---|
| 579 | <indexterm zone="ch-system-gcc libgomp">
|
---|
| 580 | <primary sortas="c-libgomp">libgomp</primary>
|
---|
| 581 | </indexterm>
|
---|
| 582 | </listitem>
|
---|
| 583 | </varlistentry>
|
---|
| 584 |
|
---|
[465ada7] | 585 | <varlistentry id="libhwasan">
|
---|
| 586 | <term><filename class="libraryfile">libhwasan</filename></term>
|
---|
| 587 | <listitem>
|
---|
| 588 | <para>The Hardware-assisted Address Sanitizer runtime library</para>
|
---|
| 589 | <indexterm zone="ch-system-gcc libhwasan">
|
---|
| 590 | <primary sortas="c-libhwasan">libhwasan</primary>
|
---|
| 591 | </indexterm>
|
---|
| 592 | </listitem>
|
---|
| 593 | </varlistentry>
|
---|
| 594 |
|
---|
[e5b4b3f] | 595 | <varlistentry id="libitm">
|
---|
| 596 | <term><filename class="libraryfile">libitm</filename></term>
|
---|
| 597 | <listitem>
|
---|
| 598 | <para>The GNU transactional memory library</para>
|
---|
| 599 | <indexterm zone="ch-system-gcc libitm">
|
---|
| 600 | <primary sortas="c-libitm">libitm</primary>
|
---|
| 601 | </indexterm>
|
---|
| 602 | </listitem>
|
---|
| 603 | </varlistentry>
|
---|
| 604 |
|
---|
[78cc3be] | 605 | <varlistentry id="liblsan">
|
---|
| 606 | <term><filename class="libraryfile">liblsan</filename></term>
|
---|
[b755562] | 607 | <listitem>
|
---|
[78cc3be] | 608 | <para>The Leak Sanitizer runtime library</para>
|
---|
| 609 | <indexterm zone="ch-system-gcc liblsan">
|
---|
| 610 | <primary sortas="c-liblsan">liblsan</primary>
|
---|
[b755562] | 611 | </indexterm>
|
---|
| 612 | </listitem>
|
---|
| 613 | </varlistentry>
|
---|
| 614 |
|
---|
[3119ddc] | 615 | <varlistentry id="liblto_plugin">
|
---|
| 616 | <term><filename class="libraryfile">liblto_plugin</filename></term>
|
---|
| 617 | <listitem>
|
---|
[30f3041] | 618 | <para>GCC's LTO plugin allows Binutils to process object files
|
---|
[e5b4b3f] | 619 | produced by GCC with LTO enabled</para>
|
---|
[3119ddc] | 620 | <indexterm zone="ch-system-gcc liblto_plugin">
|
---|
[afba93b] | 621 | <primary sortas="c-liblto_plugin">liblto_plugin</primary>
|
---|
[3119ddc] | 622 | </indexterm>
|
---|
| 623 | </listitem>
|
---|
| 624 | </varlistentry>
|
---|
[7bb9fda] | 625 |
|
---|
[3119ddc] | 626 | <varlistentry id="libquadmath">
|
---|
| 627 | <term><filename class="libraryfile">libquadmath</filename></term>
|
---|
| 628 | <listitem>
|
---|
| 629 | <para>GCC Quad Precision Math Library API</para>
|
---|
| 630 | <indexterm zone="ch-system-gcc libquadmath">
|
---|
[afba93b] | 631 | <primary sortas="c-libquadmath">libquadmath</primary>
|
---|
[3119ddc] | 632 | </indexterm>
|
---|
| 633 | </listitem>
|
---|
| 634 | </varlistentry>
|
---|
| 635 |
|
---|
[2791a8e] | 636 | <varlistentry id="libssp">
|
---|
| 637 | <term><filename class="libraryfile">libssp</filename></term>
|
---|
| 638 | <listitem>
|
---|
| 639 | <para>Contains routines supporting GCC's stack-smashing protection
|
---|
[30f3041] | 640 | functionality. Normally it is not used, because Glibc also provides
|
---|
| 641 | those routines.</para>
|
---|
[2791a8e] | 642 | <indexterm zone="ch-system-gcc libssp">
|
---|
[afba93b] | 643 | <primary sortas="c-libssp">libssp</primary>
|
---|
[2791a8e] | 644 | </indexterm>
|
---|
| 645 | </listitem>
|
---|
| 646 | </varlistentry>
|
---|
| 647 |
|
---|
[6a82dd9] | 648 | <varlistentry id="libstdc">
|
---|
| 649 | <term><filename class="libraryfile">libstdc++</filename></term>
|
---|
| 650 | <listitem>
|
---|
| 651 | <para>The standard C++ library</para>
|
---|
| 652 | <indexterm zone="ch-system-gcc libstdc">
|
---|
| 653 | <primary sortas="c-libstdc++">libstdc++</primary>
|
---|
| 654 | </indexterm>
|
---|
| 655 | </listitem>
|
---|
| 656 | </varlistentry>
|
---|
| 657 |
|
---|
[465ada7] | 658 | <varlistentry id="libstdcexp">
|
---|
| 659 | <term><filename class="libraryfile">libstdc++exp</filename></term>
|
---|
| 660 | <listitem>
|
---|
| 661 | <para>Experimental C++ Contracts library</para>
|
---|
| 662 | <indexterm zone="ch-system-gcc libstdcexp">
|
---|
| 663 | <primary sortas="c-libstdc++exp">libstdc++exp</primary>
|
---|
| 664 | </indexterm>
|
---|
| 665 | </listitem>
|
---|
| 666 | </varlistentry>
|
---|
| 667 |
|
---|
[78cc3be] | 668 | <varlistentry id="libstdcfs">
|
---|
| 669 | <term><filename class="libraryfile">libstdc++fs</filename></term>
|
---|
| 670 | <listitem>
|
---|
| 671 | <para>ISO/IEC TS 18822:2015 Filesystem library</para>
|
---|
| 672 | <indexterm zone="ch-system-gcc libstdcfs">
|
---|
| 673 | <primary sortas="c-libstdc++fs">libstdc++fs</primary>
|
---|
| 674 | </indexterm>
|
---|
| 675 | </listitem>
|
---|
| 676 | </varlistentry>
|
---|
| 677 |
|
---|
[6a82dd9] | 678 | <varlistentry id="libsupc">
|
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| 679 | <term><filename class="libraryfile">libsupc++</filename></term>
|
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| 680 | <listitem>
|
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| 681 | <para>Provides supporting routines for the C++ programming
|
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| 682 | language</para>
|
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| 683 | <indexterm zone="ch-system-gcc libsupc">
|
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| 684 | <primary sortas="c-libsupc++">libsupc++</primary>
|
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| 685 | </indexterm>
|
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| 686 | </listitem>
|
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| 687 | </varlistentry>
|
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| 688 |
|
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[f6b1d91] | 689 | <varlistentry id="libtsan">
|
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| 690 | <term><filename class="libraryfile">libtsan</filename></term>
|
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| 691 | <listitem>
|
---|
| 692 | <para>The Thread Sanitizer runtime library</para>
|
---|
| 693 | <indexterm zone="ch-system-gcc libtsan">
|
---|
| 694 | <primary sortas="c-libtsan">libtsan</primary>
|
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| 695 | </indexterm>
|
---|
| 696 | </listitem>
|
---|
| 697 | </varlistentry>
|
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| 698 |
|
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[78cc3be] | 699 | <varlistentry id="libubsan">
|
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| 700 | <term><filename class="libraryfile">libubsan</filename></term>
|
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| 701 | <listitem>
|
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| 702 | <para>The Undefined Behavior Sanitizer runtime library</para>
|
---|
| 703 | <indexterm zone="ch-system-gcc libubsan">
|
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| 704 | <primary sortas="c-libubsan">libubsan</primary>
|
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| 705 | </indexterm>
|
---|
| 706 | </listitem>
|
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| 707 | </varlistentry>
|
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| 708 |
|
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[6a82dd9] | 709 | </variablelist>
|
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| 710 |
|
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| 711 | </sect2>
|
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[673b0d8] | 712 |
|
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| 713 | </sect1>
|
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