[52d29f7] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[6732c094] | 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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[52d29f7] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[87532434] | 7 | <!ENTITY gcc-download-http "http://ftpmirror.gnu.org/gcc/gcc-&gcc-version;/gcc-&gcc-version;.tar.bz2">
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[9268fb5] | 8 | <!ENTITY gcc-download-ftp "ftp://ftp.gnu.org/gnu/gcc/gcc-&gcc-version;/gcc-&gcc-version;.tar.bz2">
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[9562b375] | 9 | <!ENTITY gcc-md5sum "6bf56a2bca9dac9dbbf8e8d1036964a8">
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| 10 | <!ENTITY gcc-size "80 MB">
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| 11 | <!ENTITY gcc-buildsize "7.4 GB (with tests)">
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| 12 | <!ENTITY gcc-time "61 SBU (with tests and parallelism=4)">
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[52d29f7] | 13 | ]>
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| 14 |
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[58bd309a] | 15 | <sect1 id="gcc" xreflabel="GCC-&gcc-version;">
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[70e3220] | 16 | <?dbhtml filename="gcc.html" ?>
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| 17 |
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| 18 | <sect1info>
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| 19 | <othername>$LastChangedBy$</othername>
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| 20 | <date>$Date$</date>
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| 21 | </sect1info>
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| 22 |
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| 23 | <title>GCC-&gcc-version;</title>
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| 24 |
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| 25 | <indexterm zone="gcc">
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[ae0673a] | 26 | <primary sortas="a-gcc-5-0">GCC-&gcc-version;</primary>
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[70e3220] | 27 | </indexterm>
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| 28 |
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| 29 | <sect2 role="package">
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| 30 | <title>Introduction to GCC</title>
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| 31 |
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[ae0673a] | 32 | <para>
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| 33 | The <application>GCC</application> package contains the GNU Compiler
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| 34 | Collection. This page describes the installation of compilers for the
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| 35 | following languages: C, C++, Fortran, Objective C, Objective C++, and Go.
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[9562b375] | 36 | One additional languages , Ada is available in the collection. It has
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| 37 | specific requirements, so it is described in a separate page (<xref
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| 38 | linkend="gcc-ada"/>). Since C and C++ are installed in LFS, this page is
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| 39 | either for upgrading C and C++, or for installing additional compilers.
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[ae0673a] | 40 | </para>
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[5512e64] | 41 |
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[a3fe45a] | 42 | &lfs80_checked;
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[625d5fe5] | 43 |
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[636acbb1] | 44 | <caution>
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[ae0673a] | 45 | <para>
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| 46 | If you are upgrading <application>GCC</application> from any other
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| 47 | version prior to &gcc-version;, then you must be careful compiling 3rd
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| 48 | party kernel modules. You should ensure that the kernel and all its
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| 49 | native modules are also compiled using the same version of
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| 50 | <application>GCC</application> that you use to build the 3rd party module.
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| 51 | This issue does not affect native kernel (and kernel modules) updates,
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| 52 | as the instructions below are a complete reinstallation of
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| 53 | <application>GCC</application>. If you have existing 3rd party modules
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| 54 | installed, ensure they are recompiled using the updated version of
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| 55 | <application>GCC</application>. As always, never update the kernel
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| 56 | headers from the ones used when <application>Glibc</application> was
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| 57 | compiled during LFS.
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| 58 | </para>
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| 59 |
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| 60 | <para>
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[e9cab664] | 61 | Some system headers need to be fixed to be used with GCC. This is done
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| 62 | during the installation of GCC, and the <quote>fixed</quote> headers
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| 63 | are installed in <filename class="directory">
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| 64 | /usr/lib/gcc/<machine triplet>/<GCC version>/include-fixed
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| 65 | </filename>. This is harmless if GCC is built during the LFS stage. But
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| 66 | if you reinstall GCC in BLFS, some of the BLFS packages may be
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| 67 | <quote>fixed</quote>. If one of those packages is reinstalled
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| 68 | afterwards, the <quote>fixed</quote> headers are not updated, which may
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| 69 | lead to version mismatches. In case that happens, the
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| 70 | <quote>fixed</quote> headers must be updated by running (as
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| 71 | <systemitem class="username">root</systemitem>):
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| 72 | <command>
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| 73 | /usr/libexec/gcc/x86_64-pc-linux-gnu/7.1.0/install-tools/mkheaders
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| 74 | </command>. The machine triplet may be different on a 32bit system.
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[ae0673a] | 75 | </para>
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[636acbb1] | 76 | </caution>
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| 77 |
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[70e3220] | 78 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 79 | <itemizedlist spacing="compact">
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| 80 | <listitem>
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[ae0673a] | 81 | <para>
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| 82 | Download (HTTP): <ulink url="&gcc-download-http;"/>
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| 83 | </para>
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[70e3220] | 84 | </listitem>
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| 85 | <listitem>
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[ae0673a] | 86 | <para>
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| 87 | Download (FTP): <ulink url="&gcc-download-ftp;"/>
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| 88 | </para>
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[70e3220] | 89 | </listitem>
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| 90 | <listitem>
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[ae0673a] | 91 | <para>
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| 92 | Download MD5 sum: &gcc-md5sum;
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| 93 | </para>
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[70e3220] | 94 | </listitem>
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| 95 | <listitem>
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[ae0673a] | 96 | <para>
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| 97 | Download size: &gcc-size;
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| 98 | </para>
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[70e3220] | 99 | </listitem>
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| 100 | <listitem>
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[ae0673a] | 101 | <para>
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| 102 | Estimated disk space required: &gcc-buildsize;
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| 103 | </para>
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[70e3220] | 104 | </listitem>
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| 105 | <listitem>
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[ae0673a] | 106 | <para>
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| 107 | Estimated build time: &gcc-time;
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| 108 | </para>
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[70e3220] | 109 | </listitem>
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| 110 | </itemizedlist>
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[ae0673a] | 111 |
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[87532434] | 112 | <!-- <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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[18310d86] | 113 | <itemizedlist spacing="compact">
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| 114 | <listitem>
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| 115 | <para>
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| 116 | Required patch:
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[5fd1f25b] | 117 | <ulink url="&patch-root;/gcc-&gcc-version;-upstream_fixes-1.patch"/>
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[18310d86] | 118 | </para>
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| 119 | </listitem>
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| 120 | </itemizedlist>
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[87532434] | 121 | -->
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[8ddc247] | 122 |
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[70e3220] | 123 | <bridgehead renderas="sect3">GCC Dependencies</bridgehead>
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| 124 |
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[7cadfea] | 125 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 126 | <para role="recommended">
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[eb631ac] | 127 | <xref linkend="dejagnu"/>, for tests
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[7cadfea] | 128 | </para>
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| 129 |
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[ae0673a] | 130 | <para condition="html" role="usernotes">
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| 131 | User Notes: <ulink url="&blfs-wiki;/gcc"/>
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| 132 | </para>
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[1039de3] | 133 |
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[70e3220] | 134 | </sect2>
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[034eda7] | 135 |
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[70e3220] | 136 | <sect2 role="installation">
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| 137 | <title>Installation of GCC</title>
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| 138 |
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| 139 | <important>
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[ae0673a] | 140 | <para>
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| 141 | Even if you specify only languages other than C and C++ to the
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| 142 | <command>./configure</command> command below, the
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| 143 | installation process will overwrite your existing
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| 144 | <application>GCC</application> C and C++ compilers and libraries.
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| 145 | Having the <application>Tcl</application>,
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| 146 | <application>Expect</application> and <application>DejaGnu</application>
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| 147 | packages installed before beginning the build is highly recommended so
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| 148 | you can run the full suite of tests.
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| 149 | </para>
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| 150 |
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| 151 | <para>
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| 152 | Do not continue with the <command>make install</command> command
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| 153 | until you are confident the build was successful. You can compare your
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| 154 | test results with those found at <ulink
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| 155 | url="http://gcc.gnu.org/ml/gcc-testresults/"/>. You may also want to
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| 156 | refer to the information found in the <application>GCC</application>
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| 157 | section of Chapter 6 in the LFS book (<ulink
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| 158 | url="&lfs-root;/chapter06/gcc.html"/>).
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| 159 | </para>
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[70e3220] | 160 | </important>
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| 161 |
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[ae0673a] | 162 | <para>
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| 163 | The instructions below are intentionally performing a
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| 164 | <quote>bootstrap</quote> process. Bootstrapping is needed for robustness
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| 165 | and is highly recommended when upgrading the compilers version. To disable
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| 166 | bootstrap anyways, add <parameter>--disable-bootstrap</parameter> to the
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| 167 | <command>./configure</command> options below.
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| 168 | </para>
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[c6bfee88] | 169 |
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[ae0673a] | 170 | <para>
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| 171 | Install <application>GCC</application> by running the following commands:
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| 172 | </para>
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| 173 |
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[92245989] | 174 | <screen><userinput>case $(uname -m) in
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| 175 | x86_64)
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| 176 | sed -e '/m64=/s/lib64/lib/' \
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| 177 | -i.orig gcc/config/i386/t-linux64
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| 178 | ;;
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| 179 | esac
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| 180 |
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| 181 | mkdir build &&
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[0e64979] | 182 | cd build &&
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[2d488eb] | 183 |
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[0e64979] | 184 | ../configure \
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[2d488eb] | 185 | --prefix=/usr \
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| 186 | --disable-multilib \
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| 187 | --with-system-zlib \
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| 188 | --enable-languages=c,c++,fortran,go,objc,obj-c++ &&
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[7cadfea] | 189 | make</userinput></screen>
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[5512e64] | 190 |
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[ae0673a] | 191 | <para>
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| 192 | If you have installed additional packages such as
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| 193 | <application>Valgrind</application> and <application>GDB</application>,
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| 194 | the <application>GCC</application> part of the testsuite will run more
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| 195 | tests than in LFS. Some of those will report FAIL and others XPASS
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| 196 | (pass when expected to FAIL). To run the tests, issue:
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| 197 | </para>
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[d3757f1c] | 198 |
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[7cadfea] | 199 | <screen><userinput>ulimit -s 32768 &&
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[b10cfc81] | 200 | make -k check</userinput></screen>
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| 201 | <!-- The command above may error out, so using && may prevent the summary
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| 202 | to be run. -->
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| 203 |
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[ae0673a] | 204 | <para>
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| 205 | The tests are very long, and the results may be hard to find in the
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| 206 | logs, specially if you use parallel jobs with make. You can get a summary
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| 207 | of the tests with:
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| 208 | </para>
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[5512e64] | 209 |
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[0e64979] | 210 | <screen><userinput>../contrib/test_summary</userinput></screen>
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[8c9ec303] | 211 |
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[ae0673a] | 212 | <para>
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| 213 | Now, as the <systemitem class="username">root</systemitem> user:
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| 214 | </para>
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[8c9ec303] | 215 |
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[70e3220] | 216 | <screen role="root"><userinput>make install &&
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[5512e64] | 217 |
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[7cadfea] | 218 | mkdir -pv /usr/share/gdb/auto-load/usr/lib &&
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| 219 | mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib &&
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| 220 |
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[38485e5c] | 221 | chown -v -R root:root \
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[2d488eb] | 222 | /usr/lib/gcc/*linux-gnu/&gcc-version;/include{,-fixed}</userinput></screen>
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[f182eed] | 223 |
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[ae0673a] | 224 | <para>
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| 225 | Some packages expect to find the C preprocessor in
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| 226 | <filename class="directory">/lib</filename> or may refer to the C compiler
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| 227 | under the name <command>cc</command>. The following symbolic links are not
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| 228 | needed if you have followed the LFS instructions, since they
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| 229 | have been already created. If you do not have them on your system, issue
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| 230 | as the <systemitem class="username">root</systemitem> user:
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| 231 | </para>
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[70e3220] | 232 |
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[ae0673a] | 233 | <screen role="root"><userinput>ln -v -sf ../usr/bin/cpp /lib &&
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| 234 | ln -v -sf gcc /usr/bin/cc &&
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| 235 | install -v -dm755 /usr/lib/bfd-plugins &&
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| 236 | ln -sfv ../../libexec/gcc/$(gcc -dumpmachine)/&gcc-version;/liblto_plugin.so /usr/lib/bfd-plugins/</userinput></screen>
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[034eda7] | 237 |
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[70e3220] | 238 | </sect2>
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| 239 |
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| 240 | <sect2 role="commands">
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| 241 | <title>Command Explanations</title>
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[8ddc247] | 242 |
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[2d488eb] | 243 | <para>
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[0e64979] | 244 | <command>mkdir build; cd build</command>: The
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[2d488eb] | 245 | <application>GCC</application> documentation recommends
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| 246 | building the package in a dedicated build directory.
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| 247 | </para>
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[70e3220] | 248 |
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[2d488eb] | 249 | <para>
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| 250 | <parameter>--disable-multilib</parameter>: This parameter ensures
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| 251 | that files are created for the specific architecture of your computer.
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| 252 | </para>
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[7cadfea] | 253 |
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[2d488eb] | 254 | <para>
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[fa200b8] | 255 | <parameter>--with-system-zlib</parameter>: Uses the system
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[2d488eb] | 256 | <application>zlib</application> instead of the bundled one.
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| 257 | <application>zlib</application> is used for compressing
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| 258 | and uncompressing <application>GCC</application>'s intermediate
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| 259 | language in LTO (Link Time Optimization) object files.
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| 260 | </para>
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[034eda7] | 261 |
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[800c9c3] | 262 | <para>
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[2d488eb] | 263 | <parameter>--enable-languages=c,c++,fortran,go,objc,obj-c++</parameter>:
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| 264 | This command identifies which languages to build. You may modify
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[9562b375] | 265 | this command to remove undesired languages. Two other languages can be
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[3d9141c] | 266 | added, besides ADA, which is described on a separate page: BRIG (add
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| 267 | <parameter>brig</parameter> to the list of enabled languages), a binary
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[9562b375] | 268 | format for HSAIL (Heterogeneous System Architecture Intermediate
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[3d9141c] | 269 | Language), and JIT (add <parameter>jit</parameter> to the list of enabled
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| 270 | languages), a library which can be linked into interpreters that
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[9562b375] | 271 | want to generate machine code <quote>on the fly</quote> at run-time. They
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[9457028] | 272 | have not been tested by the BLFS developers.
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[2d488eb] | 273 | </para>
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| 274 |
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[ae0673a] | 275 | <para>
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[0e64979] | 276 | <option>--with-default-libstdcxx-abi=gcc4-compatible</option>: Use this
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| 277 | switch if you are upgrading from a <application>GCC</application>
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| 278 | version prior to 5.1.0, and you do not want to recompile all the
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| 279 | libraries written in C++.
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[ae0673a] | 280 | </para>
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| 281 |
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[2d488eb] | 282 | <para>
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| 283 | <command>ulimit -s 32768</command>: This command prevents several
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| 284 | tests from running out of stack space.
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| 285 | </para>
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| 286 |
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| 287 | <para>
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| 288 | <command>make -k check</command>: This command runs the test suite
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| 289 | without stopping if any errors are encountered.
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| 290 | </para>
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| 291 |
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| 292 | <para>
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[9562b375] | 293 | <command>../contrib/test_summary</command>: This command will produce
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| 294 | a summary of the test suite results. You can append <command>| grep
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| 295 | -A7 Summ</command> to the command to produce an even more condensed
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| 296 | version of the summary. You may also wish to redirect the output
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[2d488eb] | 297 | to a file for review and comparison later on.
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| 298 | </para>
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| 299 |
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| 300 | <para>
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| 301 | <command>mv -v /usr/lib/*gdb.py ...</command>: The installation
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| 302 | stage puts some files used by <application>gdb</application> under the
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| 303 | <filename class="directory">/usr/lib</filename> directory. This generates
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| 304 | spurious error messages when performing <command>ldconfig</command>. This
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| 305 | command moves the files to another location.
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| 306 | </para>
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| 307 |
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| 308 | <para>
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| 309 | <command>chown -v -R root:root /usr/lib/gcc/*linux-gnu/...</command>:
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| 310 | If the package is built by a user other than root, the ownership of the
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| 311 | installed <filename class="directory">include</filename> directory (and
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| 312 | its content) will be incorrect. This command changes the ownership to the
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| 313 | <systemitem class="username">root</systemitem> user and group.
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| 314 | </para>
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[034eda7] | 315 |
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[70e3220] | 316 | </sect2>
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| 317 |
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| 318 | <sect2 role="content">
|
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| 319 | <title>Contents</title>
|
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| 320 |
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[ae0673a] | 321 | <para>
|
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| 322 | Some program and library names and descriptions are not listed here,
|
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| 323 | but can be found at
|
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| 324 | <ulink url="&lfs-root;/chapter06/gcc.html#contents-gcc"/> as they were
|
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| 325 | initially installed during the building of LFS.
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| 326 | </para>
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[2d488eb] | 327 |
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[70e3220] | 328 | <segmentedlist>
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| 329 | <segtitle>Installed Programs</segtitle>
|
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| 330 | <segtitle>Installed Libraries</segtitle>
|
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| 331 | <segtitle>Installed Directories</segtitle>
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| 332 |
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| 333 | <seglistitem>
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[7cadfea] | 334 | <seg>
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[87532434] | 335 | gccgo, go, gofmt and gfortran, hard-linked to architecture specific
|
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| 336 | names
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[7cadfea] | 337 | </seg>
|
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| 338 | <seg>
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[d7d743f0] | 339 | libgfortran.{so,a},
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[9562b375] | 340 | libgo.{so,a}, libgobegin.a, libgolibbegin.a,
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[d7d743f0] | 341 | libobjc.{so,a}, and numerous other run-time libraries and executables
|
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[7cadfea] | 342 | </seg>
|
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| 343 | <seg>
|
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[b4c31a6] | 344 | /usr/lib/go/&gcc-version;
|
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[7cadfea] | 345 | </seg>
|
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[70e3220] | 346 | </seglistitem>
|
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| 347 | </segmentedlist>
|
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| 348 |
|
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| 349 | <variablelist>
|
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| 350 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
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| 351 | <?dbfo list-presentation="list"?>
|
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| 352 | <?dbhtml list-presentation="table"?>
|
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| 353 |
|
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[034eda7] | 354 | <varlistentry id="gccgo">
|
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| 355 | <term><command>gccgo</command></term>
|
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| 356 | <listitem>
|
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[ae0673a] | 357 | <para>
|
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[5b55f9b3] | 358 | is a GCC-based compiler for the <application>Go</application>
|
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| 359 | language.
|
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[ae0673a] | 360 | </para>
|
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[034eda7] | 361 | <indexterm zone="gcc gccgo">
|
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| 362 | <primary sortas="b-gccgo">gccgo</primary>
|
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[70e3220] | 363 | </indexterm>
|
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| 364 | </listitem>
|
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| 365 | </varlistentry>
|
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| 366 |
|
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[87532434] | 367 | <varlistentry id="go">
|
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| 368 | <term><command>go</command></term>
|
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| 369 | <listitem>
|
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| 370 | <para>
|
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| 371 | is a tool for managing <application>Go</application> source code.
|
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| 372 | </para>
|
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| 373 | <indexterm zone="gcc go">
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| 374 | <primary sortas="b-go">go</primary>
|
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| 375 | </indexterm>
|
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| 376 | </listitem>
|
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| 377 | </varlistentry>
|
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| 378 |
|
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| 379 | <varlistentry id="gofmt">
|
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| 380 | <term><command>gofmt</command></term>
|
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| 381 | <listitem>
|
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| 382 | <para>
|
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| 383 | is a tool for formatting <application>Go</application> source code.
|
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| 384 | </para>
|
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| 385 | <indexterm zone="gcc gofmt">
|
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| 386 | <primary sortas="b-gofmt">gofmt</primary>
|
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| 387 | </indexterm>
|
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| 388 | </listitem>
|
---|
| 389 | </varlistentry>
|
---|
| 390 |
|
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[800c9c3] | 391 | <varlistentry id="gfortran">
|
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| 392 | <term><command>gfortran</command></term>
|
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| 393 | <listitem>
|
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[ae0673a] | 394 | <para>
|
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| 395 | is a GCC-based compiler for the <application>Fortran</application>
|
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| 396 | language.
|
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| 397 | </para>
|
---|
[800c9c3] | 398 | <indexterm zone="gcc gfortran">
|
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| 399 | <primary sortas="b-gfortran">gfortran</primary>
|
---|
| 400 | </indexterm>
|
---|
| 401 | </listitem>
|
---|
| 402 | </varlistentry>
|
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| 403 |
|
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[70e3220] | 404 | </variablelist>
|
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| 405 |
|
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| 406 | </sect2>
|
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[1a686a1] | 407 |
|
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| 408 | </sect1>
|
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