[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[b06ca36] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[673b0d8] | 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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[1f7ca93] | 7 |
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[9652249] | 8 | <sect1 id="ch-tools-glibc" role="wrap">
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[1f7ca93] | 9 | <?dbhtml filename="glibc.html"?>
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| 10 |
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[e747759] | 11 | <sect1info condition="script">
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| 12 | <productname>glibc</productname>
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| 13 | <productnumber>&glibc-version;</productnumber>
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| 14 | <address>&glibc-url;</address>
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| 15 | </sect1info>
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| 16 |
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[1f7ca93] | 17 | <title>Glibc-&glibc-version;</title>
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| 18 |
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| 19 | <indexterm zone="ch-tools-glibc">
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| 20 | <primary sortas="a-Glibc">Glibc</primary>
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| 21 | <secondary>tools</secondary>
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| 22 | </indexterm>
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| 23 |
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| 24 | <sect2 role="package">
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| 25 | <title/>
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[bc82645e] | 26 |
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[d9441360] | 27 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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[6dfcfecc] | 28 | href="../chapter08/glibc.xml"
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[1f7ca93] | 29 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
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[81fd230] | 30 |
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[1f7ca93] | 31 | <segmentedlist>
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| 32 | <segtitle>&buildtime;</segtitle>
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| 33 | <segtitle>&diskspace;</segtitle>
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[673b0d8] | 34 |
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[1f7ca93] | 35 | <seglistitem>
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[6dfcfecc] | 36 | <seg>&glibc-tmp-sbu;</seg>
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| 37 | <seg>&glibc-tmp-du;</seg>
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[1f7ca93] | 38 | </seglistitem>
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| 39 | </segmentedlist>
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[673b0d8] | 40 |
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[1f7ca93] | 41 | </sect2>
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[73aedd1d] | 42 |
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[1f7ca93] | 43 | <sect2 role="installation">
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| 44 | <title>Installation of Glibc</title>
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[6fc168b] | 45 |
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[ceebda5] | 46 | <para>First, create a symbolic link for LSB compliance. Additionally,
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[6dfcfecc] | 47 | for x86_64, create a compatibility symbolic link required for proper
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| 48 | operation of the dynamic library loader:</para>
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| 49 |
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| 50 | <screen arch="default"><userinput remap="pre">case $(uname -m) in
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| 51 | i?86) ln -sfv ld-linux.so.2 $LFS/lib/ld-lsb.so.3
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| 52 | ;;
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| 53 | x86_64) ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64
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| 54 | ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64/ld-lsb-x86-64.so.3
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| 55 | ;;
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| 56 | esac</userinput></screen>
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| 57 | <!-- no ld-linux.so.2 here as multilib is based on x86_64, not on i686 -->
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| 58 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="pre">ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64
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| 59 | ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64/ld-lsb-x86-64.so.3</userinput></screen>
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| 60 |
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[ceebda5] | 61 | <note>
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| 62 | <para>
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| 63 | The above command is correct. The <command>ln</command> command has
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| 64 | a few syntactic versions, so be sure to check
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| 65 | <command>info coreutils ln</command> and <filename>ln(1)</filename>
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| 66 | before reporting what you may think is an error.
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| 67 | </para>
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| 68 | </note>
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| 69 |
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[6dfcfecc] | 70 | <para>Some of the Glibc programs use the non-FHS compliant
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| 71 | <filename class="directory">/var/db</filename> directory to store their
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| 72 | runtime data. Apply the following patch to make such programs store their
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| 73 | runtime data in the FHS-compliant locations:</para>
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| 74 |
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| 75 | <screen><userinput remap="pre">patch -Np1 -i ../glibc-&glibc-version;-fhs-1.patch</userinput></screen>
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| 76 |
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[f1dd547] | 77 | <para>The Glibc documentation recommends building Glibc
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| 78 | in a dedicated build directory:</para>
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[9bda40d] | 79 |
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[f1dd547] | 80 | <screen><userinput remap="pre">mkdir -v build
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| 81 | cd build</userinput></screen>
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[f1c177f] | 82 |
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[1f7ca93] | 83 | <para>Next, prepare Glibc for compilation:</para>
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[73aedd1d] | 84 |
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[9c31d62] | 85 | <screen arch="default"><userinput remap="configure">../configure \
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[6dfcfecc] | 86 | --prefix=/usr \
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[63df8c7] | 87 | --host=$LFS_TGT \
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| 88 | --build=$(../scripts/config.guess) \
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[c10c983] | 89 | --enable-kernel=&min-kernel; \
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[6dfcfecc] | 90 | --with-headers=$LFS/usr/include \
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| 91 | libc_cv_slibdir=/lib</userinput></screen>
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[9c31d62] | 92 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure">../configure \
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[6dfcfecc] | 93 | --prefix=/usr \
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[9c31d62] | 94 | --host=$LFS_TGT \
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| 95 | --build=$(../scripts/config.guess) \
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| 96 | --enable-kernel=&min-kernel; \
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[6dfcfecc] | 97 | --with-headers=$LFS/usr/include \
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[9c31d62] | 98 | --enable-multi-arch \
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[6dfcfecc] | 99 | --libdir=/usr/lib \
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| 100 | --libexecdir=/usr/lib \
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| 101 | libc_cv_slibdir=/lib</userinput></screen>
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[c10c983] | 102 | <!--
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[63df8c7] | 103 | libc_cv_forced_unwind=yes \
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[c10c983] | 104 | libc_cv_c_cleanup=yes</userinput></screen> -->
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[73aedd1d] | 105 |
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[1f7ca93] | 106 | <variablelist>
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| 107 | <title>The meaning of the configure options:</title>
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| 108 |
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[4e82d47] | 109 | <varlistentry>
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[418b038] | 110 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
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[4e82d47] | 111 | <listitem>
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| 112 | <para>The combined effect of these switches is that Glibc's build system
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[6dfcfecc] | 113 | configures itself to be cross-compiled, using the cross-linker and
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| 114 | cross-compiler in <filename class="directory">$LFS/tools</filename>.</para>
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[4e82d47] | 115 | </listitem>
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| 116 | </varlistentry>
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[1118b17] | 117 |
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[1f7ca93] | 118 | <varlistentry>
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[70cd9f32] | 119 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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[1f7ca93] | 120 | <listitem>
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| 121 | <para>This tells Glibc to compile the library with support
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[70cd9f32] | 122 | for &min-kernel; and later Linux kernels. Workarounds for older
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[3532721] | 123 | kernels are not enabled.</para>
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[1f7ca93] | 124 | </listitem>
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| 125 | </varlistentry>
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[1118b17] | 126 |
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[1f7ca93] | 127 | <varlistentry>
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[6dfcfecc] | 128 | <term><parameter>--with-headers=$LFS/usr/include</parameter></term>
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[1f7ca93] | 129 | <listitem>
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[6dfcfecc] | 130 | <para>This tells Glibc to compile itself against the headers
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| 131 | recently installed to the $LFS/usr/include directory, so that
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| 132 | it knows exactly what features the kernel has and can optimize
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| 133 | itself accordingly.</para>
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[4e82d47] | 134 | </listitem>
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| 135 | </varlistentry>
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[6dfcfecc] | 136 |
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[4e82d47] | 137 | <varlistentry>
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[6dfcfecc] | 138 | <term><parameter>libc_cv_slibdir=/lib</parameter></term>
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[4e82d47] | 139 | <listitem>
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[6dfcfecc] | 140 | <para>This ensures that the library is installed in /lib instead
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| 141 | of the default /lib64 on 64 bit machines.</para>
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[1f7ca93] | 142 | </listitem>
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| 143 | </varlistentry>
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| 144 |
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[4c8c128] | 145 | <varlistentry>
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| 146 | <term><option>libc_cv_include_x86_isa_level=no</option></term>
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| 147 | <listitem>
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| 148 | <para>This disables <quote>x86 ISA needed</quote> property in
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| 149 | Glibc libraries. Use it <emphasis role="bold">if</emphasis>
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| 150 | you are building Glibc with <option>-march</option> option in
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| 151 | <envar>CFLAGS</envar>, to workaround an issue in Glibc-2.33
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| 152 | breaking it.</para>
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| 153 | </listitem>
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| 154 | </varlistentry>
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| 155 |
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[1f7ca93] | 156 | </variablelist>
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| 157 |
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| 158 | <para>During this stage the following warning might appear:</para>
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| 159 |
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| 160 | <blockquote>
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| 161 | <screen><computeroutput>configure: WARNING:
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| 162 | *** These auxiliary programs are missing or
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[81fd230] | 163 | *** incompatible versions: msgfmt
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| 164 | *** some features will be disabled.
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[1f7ca93] | 165 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 166 | </blockquote>
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[81fd230] | 167 |
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[1f7ca93] | 168 | <para>The missing or incompatible <command>msgfmt</command> program is
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[5f7456b] | 169 | generally harmless. This <command>msgfmt</command> program is part of the
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| 170 | Gettext package which the host distribution should provide.</para>
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[81fd230] | 171 |
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[7b1923d] | 172 | <note><para>There have been reports that this package may fail when
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| 173 | building as a "parallel make". If this occurs, rerun the make command
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| 174 | with a "-j1" option.</para></note>
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| 175 |
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[1f7ca93] | 176 | <para>Compile the package:</para>
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[73aedd1d] | 177 |
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[0445a3d] | 178 | <screen><userinput remap="make">make</userinput></screen>
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[73aedd1d] | 179 |
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[1f7ca93] | 180 | <para>Install the package:</para>
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[73aedd1d] | 181 |
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[6dfcfecc] | 182 | <warning><para>If <envar>LFS</envar> is not properly set, and despite the
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[38de42d] | 183 | recommendations, you are building as
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| 184 | <systemitem class="username">root</systemitem>, the next command will
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| 185 | install the newly built glibc to your host system, which most likely
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| 186 | will render it unusable. So double check that the environment is
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| 187 | correctly set, before running the following command.</para></warning>
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[6dfcfecc] | 188 |
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| 189 | <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
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| 190 |
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| 191 | <variablelist>
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| 192 | <title>The meaning of the <command>make install</command> option:</title>
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| 193 |
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| 194 | <varlistentry>
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| 195 | <term><parameter>DESTDIR=$LFS</parameter></term>
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| 196 | <listitem>
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| 197 | <para>The <envar>DESTDIR</envar> make variable is used by almost all
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| 198 | packages to define the location where the package should be
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| 199 | installed. If it is not set, it defaults to the root (<filename
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| 200 | class="directory">/</filename>) directory. Here we specify that
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| 201 | the package be installed in <filename class="directory">$LFS
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| 202 | </filename>, which will become the root after <xref linkend=
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| 203 | "ch-tools-chroot"/>.</para>
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| 204 | </listitem>
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| 205 | </varlistentry>
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[73aedd1d] | 206 |
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[6dfcfecc] | 207 | </variablelist>
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| 208 |
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| 209 | <caution>
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| 210 | <para>At this point, it is imperative to stop and ensure that the basic
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| 211 | functions (compiling and linking) of the new toolchain are working as
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| 212 | expected. To perform a sanity check, run the following commands:</para>
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[1a3e6a3] | 213 |
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[3d56263] | 214 | <screen><userinput>echo 'int main(){}' > dummy.c
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[1a3e6a3] | 215 | $LFS_TGT-gcc dummy.c
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[6dfcfecc] | 216 | readelf -l a.out | grep '/ld-linux'</userinput></screen>
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[1a3e6a3] | 217 |
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[6dfcfecc] | 218 | <para>If everything is working correctly, there should be no errors,
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| 219 | and the output of the last command will be of the form:</para>
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[1a3e6a3] | 220 |
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[6dfcfecc] | 221 | <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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[1a3e6a3] | 222 |
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[6dfcfecc] | 223 | <para arch="default">Note that for 32-bit machines, the interpreter name will be
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| 224 | <filename>/lib/ld-linux.so.2</filename>.</para>
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[1a3e6a3] | 225 |
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[6dfcfecc] | 226 | <para>If the output is not shown as above or there was no output at all,
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| 227 | then something is wrong. Investigate and retrace the steps to find out
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| 228 | where the problem is and correct it. This issue must be resolved before
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| 229 | continuing on.</para>
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[1a3e6a3] | 230 |
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[6dfcfecc] | 231 | <para>Once all is well, clean up the test files:</para>
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[1a3e6a3] | 232 |
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| 233 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 234 |
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[6dfcfecc] | 235 | </caution>
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[1a3e6a3] | 236 |
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[6dfcfecc] | 237 | <note><para>Building packages in the next chapter will serve as an
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| 238 | additional check that the toolchain has been built properly. If some
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| 239 | package, especially binutils-pass2 or gcc-pass2, fails to build, it is
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| 240 | an indication that something has gone wrong with the
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| 241 | previous Binutils, GCC, or Glibc installations.</para></note>
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[1a3e6a3] | 242 |
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[6dfcfecc] | 243 | <para>Now that our cross-toolchain is complete, finalize the installation
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| 244 | of the limits.h header. For doing so, run a utility provided by the GCC
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| 245 | developers:</para>
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[bc82645e] | 246 |
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[6dfcfecc] | 247 | <screen><userinput>$LFS/tools/libexec/gcc/$LFS_TGT/&gcc-version;/install-tools/mkheaders</userinput></screen>
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[b3f1ebb3] | 248 |
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[6dfcfecc] | 249 | </sect2>
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[e2ccc32] | 250 |
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[6dfcfecc] | 251 | <!-- - - - - - - - - - -->
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| 252 | <!-- Multilib - 32bit -->
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| 253 | <!-- - - - - - - - - - -->
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| 254 | <sect2 arch="ml_32,ml_all">
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| 255 | <title>Building Glibc - 32bit</title>
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| 256 |
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| 257 | <para>Now recompile for m32. The extracted source can be
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| 258 | reused but needs to cleaned before installing the m32
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| 259 | version of Glibc.</para>
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| 260 |
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| 261 | <para>Clear the build directory and remove artefacts from
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| 262 | previous build:</para>
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| 263 |
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| 264 | <screen><userinput remap="pre">make clean
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| 265 | find .. -name "*.a" -delete</userinput></screen>
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| 266 |
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| 267 | <para>Configure Glibc for m32 with the following commands:</para>
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| 268 |
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| 269 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -m32" \
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| 270 | CXX="$LFS_TGT-g++ -m32" \
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| 271 | ../configure \
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| 272 | --prefix=/usr \
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| 273 | --host=$LFS_TGT32 \
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| 274 | --build=$(../scripts/config.guess) \
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| 275 | --enable-kernel=&min-kernel; \
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| 276 | --with-headers=$LFS/usr/include \
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| 277 | --enable-multi-arch \
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| 278 | --libdir=&usr-lib-m32; \
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| 279 | --libexecdir=&usr-lib-m32; \
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| 280 | libc_cv_slibdir=&lib-m32;</userinput></screen>
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[e2ccc32] | 281 |
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[6dfcfecc] | 282 | <para>Compile the package:</para>
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[e2ccc32] | 283 |
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[6dfcfecc] | 284 | <screen><userinput remap="make">make</userinput></screen>
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[e2ccc32] | 285 |
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[6dfcfecc] | 286 | <para>Install the package:</para>
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[e2ccc32] | 287 |
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[6dfcfecc] | 288 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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| 289 | cp -a DESTDIR&lib-m32;/* $LFS&lib-m32;/
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| 290 | cp -a DESTDIR&usr-lib-m32; $LFS/usr/
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| 291 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-32.h \
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| 292 | $LFS/usr/include/gnu/
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| 293 | ln -svf ..&lib-m32;/ld-linux.so.2 $LFS/lib/ld-linux.so.2</userinput></screen>
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[b3f1ebb3] | 294 |
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[6dfcfecc] | 295 | <caution>
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| 296 | <para>At this point, it is imperative to stop and ensure that the basic
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| 297 | functions (compiling and linking) of the new toolchain are working as
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| 298 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 299 |
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[6dfcfecc] | 300 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 301 | $LFS_TGT-gcc -m32 dummy.c
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| 302 | readelf -l a.out | grep '/ld-linux'</userinput></screen>
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[b3f1ebb3] | 303 |
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[6dfcfecc] | 304 | <para>If everything is working correctly, there should be no errors,
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| 305 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 306 |
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[6dfcfecc] | 307 | <screen><computeroutput>[Requesting program interpreter: /lib/ld-linux.so.2]</computeroutput></screen>
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[e2ccc32] | 308 |
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[6dfcfecc] | 309 | <para>If the output is not shown as above or there was no output at all,
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| 310 | then something is wrong. Investigate and retrace the steps to find out
|
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| 311 | where the problem is and correct it. This issue must be resolved before
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| 312 | continuing on.</para>
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[e2ccc32] | 313 |
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[6dfcfecc] | 314 | <para>Once all is well, clean up the test files:</para>
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[e2ccc32] | 315 |
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[6dfcfecc] | 316 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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[e2ccc32] | 317 |
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[6dfcfecc] | 318 | </caution>
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[e2ccc32] | 319 |
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[6dfcfecc] | 320 | </sect2><!-- m32 -->
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[b3f1ebb3] | 321 |
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[6dfcfecc] | 322 | <!-- - - - - - - - - - -->
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| 323 | <!-- Multilib - x32bit -->
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| 324 | <!-- - - - - - - - - - -->
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| 325 |
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| 326 | <sect2 arch="ml_x32,ml_all">
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| 327 | <title>Building Glibc - x32bit</title>
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| 328 |
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| 329 | <para>Now recompile for mx32. The extracted source can be
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| 330 | reused but needs to cleaned before installing the mx32
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| 331 | version of Glibc.</para>
|
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| 332 |
|
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| 333 | <para>Clear the build directory and remove artefacts from
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| 334 | previous build:</para>
|
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| 335 |
|
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| 336 | <screen><userinput remap="pre">make clean
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| 337 | find .. -name "*.a" -delete</userinput></screen>
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| 338 |
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| 339 | <para>Configure Glibc for mx32 with the following commands:</para>
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| 340 |
|
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| 341 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -mx32" \
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| 342 | CXX="$LFS_TGT-g++ -mx32" \
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| 343 | ../configure \
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| 344 | --prefix=/usr \
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| 345 | --host=$LFS_TGTX32 \
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| 346 | --build=$(../scripts/config.guess) \
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| 347 | --enable-kernel=&min-kernel; \
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| 348 | --with-headers=$LFS/usr/include \
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| 349 | --enable-multi-arch \
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| 350 | --libdir=&usr-lib-mx32; \
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| 351 | --libexecdir=&usr-lib-mx32; \
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| 352 | libc_cv_slibdir=&lib-mx32;</userinput></screen>
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[b3f1ebb3] | 353 |
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[6dfcfecc] | 354 | <para>Compile the package:</para>
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| 355 |
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| 356 | <screen><userinput remap="make">make</userinput></screen>
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[b3f1ebb3] | 357 |
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[6dfcfecc] | 358 | <para>Install the package:</para>
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[b3f1ebb3] | 359 |
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[6dfcfecc] | 360 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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| 361 | cp -a DESTDIR&lib-mx32;/* $LFS&lib-mx32;/
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| 362 | cp -a DESTDIR&usr-lib-mx32; $LFS/usr/
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| 363 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-x32.h \
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| 364 | $LFS/usr/include/gnu/
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| 365 | ln -svf ..&lib-mx32;/ld-linux-x32.so.2 $LFS/lib/ld-linux-x32.so.2</userinput></screen>
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[b3f1ebb3] | 366 |
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[6dfcfecc] | 367 | <caution>
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| 368 | <para>At this point, it is imperative to stop and ensure that the basic
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| 369 | functions (compiling and linking) of the new toolchain are working as
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| 370 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 371 |
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| 372 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 373 | $LFS_TGT-gcc -mx32 dummy.c
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[6dfcfecc] | 374 | readelf -l a.out | grep '/ld-linux-x32'</userinput></screen>
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[b3f1ebb3] | 375 |
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[6dfcfecc] | 376 | <para>If everything is working correctly, there should be no errors,
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| 377 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 378 |
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[d7e0db5] | 379 | <screen><computeroutput>[Requesting program interpreter: /libx32/ld-linux-x32.so.2]</computeroutput></screen>
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[b3f1ebb3] | 380 |
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[6dfcfecc] | 381 | <para>If the output is not shown as above or there was no output at all,
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| 382 | then something is wrong. Investigate and retrace the steps to find out
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| 383 | where the problem is and correct it. This issue must be resolved before
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| 384 | continuing on.</para>
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[b3f1ebb3] | 385 |
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[6dfcfecc] | 386 | <para>Once all is well, clean up the test files:</para>
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[b3f1ebb3] | 387 |
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| 388 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 389 |
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[6dfcfecc] | 390 | </caution>
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| 391 |
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| 392 | </sect2><!-- mx32 -->
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| 393 |
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[1f7ca93] | 394 | <sect2 role="content">
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| 395 | <title/>
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[81fd230] | 396 |
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[1f7ca93] | 397 | <para>Details on this package are located in
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| 398 | <xref linkend="contents-glibc" role="."/></para>
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| 399 |
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| 400 | </sect2>
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[81fd230] | 401 |
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[1f7ca93] | 402 | </sect1>
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