| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 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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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-system-gcc" role="wrap">
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| 9 | <?dbhtml filename="gcc.html"?>
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| 10 |
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| 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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| 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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| 25 |
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| 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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| 28 |
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| 29 | <segmentedlist>
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| 30 | <segtitle>&buildtime;</segtitle>
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| 31 | <segtitle>&diskspace;</segtitle>
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| 32 |
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| 33 | <seglistitem>
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| 34 | <seg>&gcc-fin-sbu;</seg>
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| 35 | <seg>&gcc-fin-du;</seg>
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| 36 | </seglistitem>
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| 37 | </segmentedlist>
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| 38 |
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| 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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| 43 |
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| 44 | <para>First, apply a patch to fix some regressions and to cope
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| 45 | with the removal of an obsolete kernel header in linux-5.13:</para>
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| 46 |
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| 47 | <screen><userinput remap="pre">patch -Np1 -i ../gcc-&gcc-version;-upstream_fixes-1.patch</userinput></screen>
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| 48 |
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| 49 | <para>If building on x86_64, change the default directory name for 64-bit
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| 50 | libraries to <quote>lib</quote>:</para>
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| 51 |
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| 52 | <screen arch="default"><userinput remap="pre">case $(uname -m) in
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| 53 | x86_64)
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| 54 | sed -e '/m64=/s/lib64/lib/' \
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| 55 | -i.orig gcc/config/i386/t-linux64
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| 56 | ;;
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| 57 | esac</userinput></screen>
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| 58 |
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| 59 | <para arch="ml_32,ml_x32,ml_all">Change the default directory name for 64-bit
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| 60 | libraries to <quote>lib</quote>:</para>
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| 61 |
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| 62 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="pre">sed -e '/m64=/s/lib64/lib/' \
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| 63 | -e '/m32=/s/m32=.*/m32=..\/lib32$(call if_multiarch,:i386-linux-gnu)/' \
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| 64 | -i.orig gcc/config/i386/t-linux64</userinput></screen>
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| 65 |
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| 66 | <para>The GCC documentation recommends building GCC in a dedicated build directory:</para>
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| 67 |
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| 68 | <screen><userinput remap="pre">mkdir -v build
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| 69 | cd build</userinput></screen>
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| 70 |
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| 71 | <para>Prepare GCC for compilation:</para>
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| 72 |
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| 73 | <screen arch="default"><userinput remap="configure">../configure --prefix=/usr \
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| 74 | LD=ld \
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| 75 | --enable-languages=c,c++ \
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| 76 | --disable-multilib \
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| 77 | --disable-bootstrap \
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| 78 | --with-system-zlib</userinput></screen>
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| 79 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure"
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| 80 | arch="ml_32" >mlist=m64,m32</userinput><userinput remap="configure"
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| 81 | arch="ml_x32">mlist=m64,mx32</userinput><userinput remap="configure"
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| 82 | arch="ml_all">mlist=m64,m32,mx32</userinput>
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| 83 | <userinput remap="configure">../configure --prefix=/usr \
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| 84 | LD=ld \
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| 85 | --enable-languages=c,c++ \
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| 86 | --enable-multilib \
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| 87 | --with-multilib-list=$mlist \
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| 88 | --disable-bootstrap \
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| 89 | --with-system-zlib</userinput></screen>
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| 90 |
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| 91 | <para>Note that for other programming languages there are some prerequisites that
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| 92 | are not yet available. See the
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| 93 | <ulink url="&blfs-book;general/gcc.html">BLFS Book GCC page</ulink>
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| 94 | for instructions on how to build all of GCC's supported languages.</para>
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| 95 |
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| 96 | <variablelist>
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| 97 | <title>The meaning of the new configure parameters:</title>
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| 98 |
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| 99 | <varlistentry>
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| 100 | <term><parameter>LD=ld</parameter></term>
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| 101 | <listitem>
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| 102 | <para>This parameter makes the configure script use the ld installed
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| 103 | by the binutils built earlier in this chapter, rather than
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| 104 | the cross-built version which would otherwise be used.</para>
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| 105 | </listitem>
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| 106 | </varlistentry>
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| 107 |
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| 108 | <varlistentry>
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| 109 | <term><parameter>--with-system-zlib</parameter></term>
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| 110 | <listitem>
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| 111 | <para>This switch tells GCC to link to the system installed copy of
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| 112 | the zlib library, rather than its own internal copy.</para>
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| 113 | </listitem>
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| 114 | </varlistentry>
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| 115 | </variablelist>
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| 116 |
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| 117 | <para>Compile the package:</para>
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| 118 |
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| 119 | <screen><userinput remap="make">make</userinput></screen>
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| 120 |
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| 121 | <important>
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| 122 | <para>In this section, the test suite for GCC is considered
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| 123 | critical. Do not skip it under any circumstance.</para>
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| 124 | </important>
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| 125 |
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| 126 | <para>One set of tests in the GCC test suite is known to exhaust the default
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| 127 | stack, so increase the stack size prior to running the tests:</para>
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| 128 |
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| 129 | <screen><userinput remap="test">ulimit -s 32768</userinput></screen>
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| 130 |
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| 131 | <para>Test the results as a non-privileged user, but do not stop at errors:</para>
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| 132 |
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| 133 | <screen><userinput remap="test">chown -Rv tester .
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| 134 | su tester -c "PATH=$PATH make -k check"</userinput></screen>
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| 135 |
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| 136 | <para>To receive a summary of the test suite results, run:</para>
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| 137 |
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| 138 | <screen><userinput remap="test">../contrib/test_summary</userinput></screen>
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| 139 |
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| 140 | <para>For only the summaries, pipe the output through
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| 141 | <userinput>grep -A7 Summ</userinput>.</para>
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| 142 |
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| 143 | <para>Results can be compared with those located at <ulink
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| 144 | url="&test-results;"/> and
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| 145 | <ulink url="https://gcc.gnu.org/ml/gcc-testresults/"/>.</para>
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| 146 |
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| 147 | <para>In g++, three tests in constexpr-52830 are known to fail and
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| 148 | also to be treated as unexpected successes (XPASS). This is because
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| 149 | an <quote>internal compiler error</quote> on this test is fixed, but
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| 150 | the compiler still rejects some valid code.</para>
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| 151 |
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| 152 | <!-- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96322
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| 153 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71367 -->
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| 154 | <para>In libstdc++, one numpunct test and six tests related to get_time are
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| 155 | known to fail. These are all because the locale definitions in glibc have
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| 156 | changed but libstdc++ does not currently support those changes.</para>
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| 157 |
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| 158 | <!--<para>Additionally the following tests related to the following files
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| 159 | are known to fail with glibc-2.33: asan_test.C, co-ret-17-void-ret-coro.C,
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| 160 | pr95519-05-gro.C, pr80166.c.</para>
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| 161 | -->
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| 162 |
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| 163 | <!-- don't fail anymore after the move of iana-etc and /etc/hosts
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| 164 | <para>Two tests named lookup.cc and reverse.cc in experimental/net
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| 165 | are known to fail in LFS chroot environment because they require
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| 166 | /etc/hosts and iana-etc.</para>
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| 167 | -->
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| 168 | <para>A few unexpected failures cannot always be avoided. The GCC developers
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| 169 | are usually aware of these issues, but have not resolved them yet.
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| 170 | Unless the test results are vastly different from those at the above URL,
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| 171 | it is safe to continue.</para>
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| 172 |
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| 173 | <!--note><para>
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| 174 | On some combinations of kernel configuration and AMD processors
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| 175 | there may be more than 1100 failures in the gcc.target/i386/mpx
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| 176 | tests (which are designed to test the MPX option on recent
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| 177 | Intel processors). These can safely be ignored on AMD
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| 178 | processors. These tests will also fail on Intel processors if MPX support
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| 179 | is not enabled in the kernel even though it is present on the CPU.
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| 180 | </para></note-->
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| 181 |
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| 182 | <!-- PR 91085, will be fixed in GCC 12. -->
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| 183 | <para>Install the package and remove an unneeded directory:</para>
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| 184 |
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| 185 | <screen><userinput remap="install">make install
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| 186 | rm -rf /usr/lib/gcc/$(gcc -dumpmachine)/&gcc-version;/include-fixed/bits/</userinput></screen>
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| 187 |
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| 188 | <para>The GCC build directory is owned by <systemitem class="username">
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| 189 | tester</systemitem> now and the ownership of the installed header
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| 190 | directory (and its content) will be incorrect. Change the ownership to
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| 191 | <systemitem class="username">root</systemitem> user and group:</para>
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| 192 |
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| 193 | <screen><userinput remap="install">chown -v -R root:root \
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| 194 | /usr/lib/gcc/*linux-gnu/&gcc-version;/include{,-fixed}</userinput></screen>
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| 195 |
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| 196 | <para>Create a symlink required by the <ulink
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| 197 | url="https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch03s09.html">FHS</ulink>
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| 198 | for "historical" reasons.</para>
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| 199 |
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| 200 | <screen><userinput remap="install">ln -svr /usr/bin/cpp /usr/lib</userinput></screen>
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| 201 | <!-- already done earlier
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| 202 | <para>Many packages use the name <command>cc</command> to call the C
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| 203 | compiler. To satisfy those packages, create a symlink:</para>
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| 204 |
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| 205 | <screen><userinput remap="install">ln -sv gcc /usr/bin/cc</userinput></screen>
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| 206 | -->
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| 207 | <para>Add a compatibility symlink to enable building programs with
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| 208 | Link Time Optimization (LTO):</para>
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| 209 |
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| 210 | <screen><userinput remap="install">ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so \
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| 211 | /usr/lib/bfd-plugins/</userinput></screen>
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| 212 |
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| 213 | <para>Now that our final toolchain is in place, it is important to again ensure
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| 214 | that compiling and linking will work as expected. We do this by performing
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| 215 | some sanity checks:</para>
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| 216 |
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| 217 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 218 | href="adjusting.xml"
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| 219 | xpointer="xpointer(//*[@os='a'])"/>
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| 220 |
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| 221 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 222 | href="adjusting.xml"
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| 223 | xpointer="xpointer(//*[@os='b'])"/>
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| 224 |
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| 225 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 226 | href="adjusting.xml"
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| 227 | xpointer="xpointer(//*[@os='c'])"/>
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| 228 |
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| 229 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 230 | href="adjusting.xml"
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| 231 | xpointer="xpointer(//*[@os='d'])"/>
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| 232 |
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| 233 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 234 | href="adjusting.xml"
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| 235 | xpointer="xpointer(//*[@os='e'])"/>
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| 236 |
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| 237 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 238 | href="adjusting.xml"
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| 239 | xpointer="xpointer(//*[@os='f'])"/>
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| 240 |
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| 241 | <screen><computeroutput>/usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crt1.o succeeded
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| 242 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crti.o succeeded
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| 243 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/../../../../lib/crtn.o succeeded</computeroutput></screen>
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| 244 |
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| 245 | <para>Depending on your machine architecture, the above may differ slightly.
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| 246 | The difference will be the name of the directory
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| 247 | after <filename class="directory">/usr/lib/gcc</filename>. The important
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| 248 | thing to look for here is that <command>gcc</command> has found all three
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| 249 | <filename>crt*.o</filename> files under the
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| 250 | <filename class="directory">/usr/lib</filename> directory.</para>
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| 251 |
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| 252 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 253 | href="adjusting.xml"
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| 254 | xpointer="xpointer(//*[@os='g'])"/>
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| 255 |
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| 256 | <screen><userinput>grep -B4 '^ /usr/include' dummy.log</userinput></screen>
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| 257 |
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| 258 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 259 | href="adjusting.xml"
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| 260 | xpointer="xpointer(//*[@os='h'])"/>
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| 261 |
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| 262 | <screen><computeroutput>#include <...> search starts here:
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| 263 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include
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| 264 | /usr/local/include
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| 265 | /usr/lib/gcc/x86_64-pc-linux-gnu/&gcc-version;/include-fixed
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| 266 | /usr/include</computeroutput></screen>
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| 267 |
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| 268 | <para>Again, the directory named after your target triplet may be
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| 269 | different than the above, depending on your system architecture.</para>
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| 270 |
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| 271 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 272 | href="adjusting.xml"
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| 273 | xpointer="xpointer(//*[@os='i'])"/>
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| 274 |
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| 275 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 276 | href="adjusting.xml"
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| 277 | xpointer="xpointer(//*[@os='j'])"/>
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| 278 |
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| 279 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 280 | href="adjusting.xml"
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| 281 | xpointer="xpointer(//*[@os='k'])"/>
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| 282 |
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| 283 | <screen><computeroutput>SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib64")
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| 284 | SEARCH_DIR("/usr/local/lib64")
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| 285 | SEARCH_DIR("/lib64")
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| 286 | SEARCH_DIR("/usr/lib64")
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| 287 | SEARCH_DIR("/usr/x86_64-pc-linux-gnu/lib")
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| 288 | SEARCH_DIR("/usr/local/lib")
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| 289 | SEARCH_DIR("/lib")
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| 290 | SEARCH_DIR("/usr/lib");</computeroutput></screen>
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| 291 |
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| 292 | <para arch="default">A 32-bit system may see a few different directories. For example, here
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| 293 | is the output from an i686 machine:</para>
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| 294 |
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| 295 | <!-- not using entities here as the dir names has nothing to do with multilib -->
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| 296 | <screen arch="default"><computeroutput>SEARCH_DIR("/usr/i686-pc-linux-gnu/lib32")
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| 297 | SEARCH_DIR("/usr/local/lib32")
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| 298 | SEARCH_DIR("/lib32")
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| 299 | SEARCH_DIR("/usr/lib32")
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| 300 | SEARCH_DIR("/usr/i686-pc-linux-gnu/lib")
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| 301 | SEARCH_DIR("/usr/local/lib")
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| 302 | SEARCH_DIR("/lib")
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| 303 | SEARCH_DIR("/usr/lib");</computeroutput></screen>
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| 304 |
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| 305 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 306 | href="adjusting.xml"
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| 307 | xpointer="xpointer(//*[@os='l'])"/>
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| 308 |
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| 309 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 310 | href="adjusting.xml"
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| 311 | xpointer="xpointer(//*[@os='m'])"/>
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| 312 |
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| 313 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 314 | href="adjusting.xml"
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| 315 | xpointer="xpointer(//*[@os='n'])"/>
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| 316 |
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| 317 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 318 | href="adjusting.xml"
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| 319 | xpointer="xpointer(//*[@os='o'])"/>
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| 320 |
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| 321 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 322 | href="adjusting.xml"
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| 323 | xpointer="xpointer(//*[@os='p'])"/>
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| 324 |
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| 325 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 326 | href="adjusting.xml"
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| 327 | xpointer="xpointer(//*[@os='q'])"/>
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| 328 |
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| 329 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 330 | href="adjusting.xml"
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| 331 | xpointer="xpointer(//*[@os='r'])"/>
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| 332 |
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| 333 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 334 | href="adjusting.xml"
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| 335 | xpointer="xpointer(//*[@os='s'])"/>
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| 336 |
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| 337 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 338 | href="adjusting.xml"
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| 339 | xpointer="xpointer(//*[@os='t'])"/>
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| 340 |
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| 341 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 342 | href="adjusting.xml"
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| 343 | xpointer="xpointer(//*[@os='u'])"/>
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| 344 |
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| 345 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 346 | href="adjusting.xml"
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| 347 | xpointer="xpointer(//*[@os='v'])"/>
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| 348 |
|
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| 349 | <para>Finally, move a misplaced file:</para>
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| 350 |
|
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| 351 | <screen><userinput remap="install">mkdir -pv /usr/share/gdb/auto-load/usr/lib
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| 352 | mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib</userinput></screen>
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| 353 |
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| 354 | </sect2>
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| 355 |
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| 356 | <sect2 id="contents-gcc" role="content">
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| 357 | <title>Contents of GCC</title>
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| 358 |
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| 359 | <segmentedlist>
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| 360 | <segtitle>Installed programs</segtitle>
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| 361 | <segtitle>Installed libraries</segtitle>
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| 362 | <segtitle>Installed directories</segtitle>
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| 363 |
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| 364 | <seglistitem>
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| 365 | <seg>c++, cc (link to gcc), cpp, g++, gcc,
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| 366 | gcc-ar, gcc-nm, gcc-ranlib, gcov, gcov-dump, and gcov-tool</seg>
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| 367 |
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| 368 | <seg>libasan.{a,so}, libatomic.{a,so}, libcc1.so, libgcc.a, libgcc_eh.a,
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| 369 | libgcc_s.so, libgcov.a, libgomp.{a,so}, libitm.{a,so},
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| 370 | liblsan.{a,so}, liblto_plugin.so,
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| 371 | libquadmath.{a,so}, libssp.{a,so}, libssp_nonshared.a,
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| 372 | libstdc++.{a,so}, libstdc++fs.a, libsupc++.a, libtsan.{a,so},
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| 373 | and libubsan.{a,so}</seg>
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| 374 |
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| 375 | <seg>/usr/include/c++, /usr/lib/gcc, /usr/libexec/gcc, and
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| 376 | /usr/share/gcc-&gcc-version;</seg>
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| 377 | </seglistitem>
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| 378 | </segmentedlist>
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| 379 |
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| 380 | <variablelist>
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| 381 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 382 | <?dbfo list-presentation="list"?>
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| 383 | <?dbhtml list-presentation="table"?>
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| 384 |
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| 385 | <varlistentry id="c">
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| 386 | <term><command>c++</command></term>
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| 387 | <listitem>
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| 388 | <para>The C++ compiler</para>
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| 389 | <indexterm zone="ch-system-gcc c">
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| 390 | <primary sortas="b-c++">c++</primary>
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| 391 | </indexterm>
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| 392 | </listitem>
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| 393 | </varlistentry>
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| 394 |
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| 395 | <varlistentry id="cc">
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| 396 | <term><command>cc</command></term>
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| 397 | <listitem>
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| 398 | <para>The C compiler</para>
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| 399 | <indexterm zone="ch-system-gcc cc">
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| 400 | <primary sortas="b-cc">cc</primary>
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| 401 | </indexterm>
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| 402 | </listitem>
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| 403 | </varlistentry>
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| 404 |
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| 405 | <varlistentry id="cpp">
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| 406 | <term><command>cpp</command></term>
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| 407 | <listitem>
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| 408 | <para>The C preprocessor; it is used by the compiler to expand the
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| 409 | #include, #define, and similar statements in the source files</para>
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| 410 | <indexterm zone="ch-system-gcc cpp">
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| 411 | <primary sortas="b-cpp">cpp</primary>
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| 412 | </indexterm>
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| 413 | </listitem>
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| 414 | </varlistentry>
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| 415 |
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| 416 | <varlistentry id="g">
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| 417 | <term><command>g++</command></term>
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| 418 | <listitem>
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| 419 | <para>The C++ compiler</para>
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| 420 | <indexterm zone="ch-system-gcc g">
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| 421 | <primary sortas="b-g++">g++</primary>
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| 422 | </indexterm>
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| 423 | </listitem>
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| 424 | </varlistentry>
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| 425 |
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| 426 | <varlistentry id="gcc">
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| 427 | <term><command>gcc</command></term>
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| 428 | <listitem>
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| 429 | <para>The C compiler</para>
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| 430 | <indexterm zone="ch-system-gcc gcc">
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| 431 | <primary sortas="b-gcc">gcc</primary>
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| 432 | </indexterm>
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| 433 | </listitem>
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| 434 | </varlistentry>
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| 435 |
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| 436 | <varlistentry id="gcc-ar">
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| 437 | <term><command>gcc-ar</command></term>
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| 438 | <listitem>
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| 439 | <para>A wrapper around <command>ar</command> that adds a
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| 440 | plugin to the command line. This program is only used
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| 441 | to add "link time optimization" and is not useful with the
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| 442 | default build options</para>
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| 443 | <indexterm zone="ch-system-gcc gcc-ar">
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| 444 | <primary sortas="b-gcc-ar">gc-ar</primary>
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| 445 | </indexterm>
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| 446 | </listitem>
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| 447 | </varlistentry>
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| 448 |
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| 449 | <varlistentry id="gcc-nm">
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| 450 | <term><command>gcc-nm</command></term>
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| 451 | <listitem>
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| 452 | <para>A wrapper around <command>nm</command> that adds a
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| 453 | plugin to the command line. This program is only used
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| 454 | to add "link time optimization" and is not useful with the
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| 455 | default build options</para>
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| 456 | <indexterm zone="ch-system-gcc gcc-nm">
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| 457 | <primary sortas="b-gcc-nm">gc-nm</primary>
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| 458 | </indexterm>
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| 459 | </listitem>
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| 460 | </varlistentry>
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| 461 |
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| 462 | <varlistentry id="gcc-ranlib">
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| 463 | <term><command>gcc-ranlib</command></term>
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| 464 | <listitem>
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| 465 | <para>A wrapper around <command>ranlib</command> that adds a
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| 466 | plugin to the command line. This program is only used
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| 467 | to add "link time optimization" and is not useful with the
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| 468 | default build options</para>
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| 469 | <indexterm zone="ch-system-gcc gcc-ranlib">
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| 470 | <primary sortas="b-gcc-ranlib">gc-ranlib</primary>
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| 471 | </indexterm>
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| 472 | </listitem>
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| 473 | </varlistentry>
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| 474 |
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| 475 | <varlistentry id="gcov">
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| 476 | <term><command>gcov</command></term>
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| 477 | <listitem>
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| 478 | <para>A coverage testing tool; it is used to analyze programs to
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| 479 | determine where optimizations will have the most effect</para>
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| 480 | <indexterm zone="ch-system-gcc gcov">
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| 481 | <primary sortas="b-gcov">gcov</primary>
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| 482 | </indexterm>
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| 483 | </listitem>
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| 484 | </varlistentry>
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| 485 |
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| 486 | <varlistentry id="gcov-dump">
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| 487 | <term><command>gcov-dump</command></term>
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| 488 | <listitem>
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| 489 | <para>Offline gcda and gcno profile dump tool</para>
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| 490 | <indexterm zone="ch-system-gcc gcov-dump">
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| 491 | <primary sortas="b-gcov-dump">gcov-dump</primary>
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| 492 | </indexterm>
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| 493 | </listitem>
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| 494 | </varlistentry>
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| 495 |
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| 496 | <varlistentry id="gcov-tool">
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| 497 | <term><command>gcov-tool</command></term>
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| 498 | <listitem>
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| 499 | <para>Offline gcda profile processing tool</para>
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| 500 | <indexterm zone="ch-system-gcc gcov-tool">
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| 501 | <primary sortas="b-gcov-tool">gcov-tool</primary>
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| 502 | </indexterm>
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| 503 | </listitem>
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| 504 | </varlistentry>
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| 505 |
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| 506 | <varlistentry id="libasan">
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| 507 | <term><filename class="libraryfile">libasan</filename></term>
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| 508 | <listitem>
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| 509 | <para>The Address Sanitizer runtime library</para>
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| 510 | <indexterm zone="ch-system-gcc libasan">
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| 511 | <primary sortas="b-libasan">libasan</primary>
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| 512 | </indexterm>
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| 513 | </listitem>
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| 514 | </varlistentry>
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| 515 |
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| 516 | <varlistentry id="libatomic">
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| 517 | <term><filename class="libraryfile">libatomic</filename></term>
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| 518 | <listitem>
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| 519 | <para>GCC atomic built-in runtime library</para>
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| 520 | <indexterm zone="ch-system-gcc libatomic">
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| 521 | <primary sortas="b-libatomic">libatomic</primary>
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| 522 | </indexterm>
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| 523 | </listitem>
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| 524 | </varlistentry>
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| 525 |
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| 526 | <varlistentry id="libcc1">
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| 527 | <term><filename class="libraryfile">libcc1</filename></term>
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| 528 | <listitem>
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| 529 | <para>The C preprocessing library</para>
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| 530 | <indexterm zone="ch-system-gcc libcc1">
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| 531 | <primary sortas="b-libcc1">libcc1</primary>
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| 532 | </indexterm>
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| 533 | </listitem>
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| 534 | </varlistentry>
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| 535 |
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| 536 | <varlistentry id="libgcc">
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| 537 | <term><filename class="libraryfile">libgcc</filename></term>
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| 538 | <listitem>
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| 539 | <para>Contains run-time support for <command>gcc</command></para>
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| 540 | <indexterm zone="ch-system-gcc libgcc">
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| 541 | <primary sortas="c-libgcc">libgcc</primary>
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| 542 | </indexterm>
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| 543 | </listitem>
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| 544 | </varlistentry>
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| 545 |
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| 546 | <varlistentry id="libgcov">
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| 547 | <term><filename class="libraryfile">libgcov</filename></term>
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| 548 | <listitem>
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| 549 | <para>This library is linked in to a program when GCC is instructed
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| 550 | to enable profiling</para>
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| 551 | <indexterm zone="ch-system-gcc libgcov">
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| 552 | <primary sortas="c-libgcov">libgcov</primary>
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| 553 | </indexterm>
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| 554 | </listitem>
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| 555 | </varlistentry>
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| 556 |
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| 557 | <varlistentry id="libgomp">
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| 558 | <term><filename class="libraryfile">libgomp</filename></term>
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| 559 | <listitem>
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| 560 | <para>GNU implementation of the OpenMP API for multi-platform
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| 561 | shared-memory parallel programming in C/C++ and Fortran</para>
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| 562 | <indexterm zone="ch-system-gcc libgomp">
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| 563 | <primary sortas="c-libgomp">libgomp</primary>
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| 564 | </indexterm>
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| 565 | </listitem>
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| 566 | </varlistentry>
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| 567 |
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| 568 | <varlistentry id="liblsan">
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| 569 | <term><filename class="libraryfile">liblsan</filename></term>
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| 570 | <listitem>
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| 571 | <para>The Leak Sanitizer runtime library</para>
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| 572 | <indexterm zone="ch-system-gcc liblsan">
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| 573 | <primary sortas="c-liblsan">liblsan</primary>
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| 574 | </indexterm>
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| 575 | </listitem>
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| 576 | </varlistentry>
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| 577 |
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| 578 | <varlistentry id="liblto_plugin">
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| 579 | <term><filename class="libraryfile">liblto_plugin</filename></term>
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| 580 | <listitem>
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| 581 | <para>GCC's Link Time Optimization (LTO) plugin allows GCC to perform
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| 582 | optimizations across compilation units</para>
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| 583 | <indexterm zone="ch-system-gcc liblto_plugin">
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| 584 | <primary sortas="c-liblto_plugin">liblto_plugin</primary>
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| 585 | </indexterm>
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| 586 | </listitem>
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| 587 | </varlistentry>
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| 588 |
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| 589 | <varlistentry id="libquadmath">
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| 590 | <term><filename class="libraryfile">libquadmath</filename></term>
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| 591 | <listitem>
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| 592 | <para>GCC Quad Precision Math Library API</para>
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| 593 | <indexterm zone="ch-system-gcc libquadmath">
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| 594 | <primary sortas="c-libquadmath">libquadmath</primary>
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| 595 | </indexterm>
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| 596 | </listitem>
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| 597 | </varlistentry>
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| 598 |
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| 599 | <varlistentry id="libssp">
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| 600 | <term><filename class="libraryfile">libssp</filename></term>
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| 601 | <listitem>
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| 602 | <para>Contains routines supporting GCC's stack-smashing protection
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| 603 | functionality</para>
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| 604 | <indexterm zone="ch-system-gcc libssp">
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| 605 | <primary sortas="c-libssp">libssp</primary>
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| 606 | </indexterm>
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| 607 | </listitem>
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| 608 | </varlistentry>
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| 609 |
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| 610 | <varlistentry id="libstdc">
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| 611 | <term><filename class="libraryfile">libstdc++</filename></term>
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| 612 | <listitem>
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| 613 | <para>The standard C++ library</para>
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| 614 | <indexterm zone="ch-system-gcc libstdc">
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| 615 | <primary sortas="c-libstdc++">libstdc++</primary>
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| 616 | </indexterm>
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| 617 | </listitem>
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| 618 | </varlistentry>
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| 619 |
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| 620 | <varlistentry id="libstdcfs">
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| 621 | <term><filename class="libraryfile">libstdc++fs</filename></term>
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| 622 | <listitem>
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| 623 | <para>ISO/IEC TS 18822:2015 Filesystem library</para>
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| 624 | <indexterm zone="ch-system-gcc libstdcfs">
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| 625 | <primary sortas="c-libstdc++fs">libstdc++fs</primary>
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| 626 | </indexterm>
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| 627 | </listitem>
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| 628 | </varlistentry>
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| 629 |
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| 630 | <varlistentry id="libsupc">
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| 631 | <term><filename class="libraryfile">libsupc++</filename></term>
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| 632 | <listitem>
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| 633 | <para>Provides supporting routines for the C++ programming
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| 634 | language</para>
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| 635 | <indexterm zone="ch-system-gcc libsupc">
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| 636 | <primary sortas="c-libsupc++">libsupc++</primary>
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| 637 | </indexterm>
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| 638 | </listitem>
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| 639 | </varlistentry>
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| 640 |
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| 641 | <varlistentry id="libtsan">
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| 642 | <term><filename class="libraryfile">libtsan</filename></term>
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| 643 | <listitem>
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| 644 | <para>The Thread Sanitizer runtime library</para>
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| 645 | <indexterm zone="ch-system-gcc libtsan">
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| 646 | <primary sortas="c-libtsan">libtsan</primary>
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| 647 | </indexterm>
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| 648 | </listitem>
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| 649 | </varlistentry>
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| 650 |
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| 651 | <varlistentry id="libubsan">
|
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| 652 | <term><filename class="libraryfile">libubsan</filename></term>
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| 653 | <listitem>
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| 654 | <para>The Undefined Behavior Sanitizer runtime library</para>
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| 655 | <indexterm zone="ch-system-gcc libubsan">
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| 656 | <primary sortas="c-libubsan">libubsan</primary>
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| 657 | </indexterm>
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| 658 | </listitem>
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| 659 | </varlistentry>
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| 660 |
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| 661 | </variablelist>
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| 662 |
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| 663 | </sect2>
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| 664 |
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| 665 | </sect1>
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