[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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[0fc1b27] | 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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[f6820bb6] | 64 | several syntactic versions, so be sure to check
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[0fc1b27] | 65 | <command>info coreutils ln</command> and <filename>ln(1)</filename>
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[f6820bb6] | 66 | before reporting what may appear to be an error.
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[0fc1b27] | 67 | </para>
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| 68 | </note>
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| 69 |
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[f6820bb6] | 70 | <para>Some of the Glibc programs use the non-FHS-compliant
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[6dfcfecc] | 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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[a26f29f] | 77 | <para>The Glibc documentation recommends building Glibc
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[f1dd547] | 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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[4eee9cc] | 83 | <para>Ensure that the <command>ldconfig</command> and <command>sln</command>
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[bcb20b4] | 84 | utilities are installed into
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[4eee9cc] | 85 | <filename class="directory">/usr/sbin</filename>:</para>
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| 86 |
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| 87 | <screen><userinput remap="pre">echo "rootsbindir=/usr/sbin" > configparms</userinput></screen>
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| 88 |
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[1f7ca93] | 89 | <para>Next, prepare Glibc for compilation:</para>
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[73aedd1d] | 90 |
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[9c31d62] | 91 | <screen arch="default"><userinput remap="configure">../configure \
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[6dfcfecc] | 92 | --prefix=/usr \
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[63df8c7] | 93 | --host=$LFS_TGT \
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| 94 | --build=$(../scripts/config.guess) \
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[0f18f2b] | 95 | --enable-kernel=&min-kernel; \
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[6dfcfecc] | 96 | --with-headers=$LFS/usr/include \
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[d4b5218] | 97 | libc_cv_slibdir=/usr/lib</userinput></screen>
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[9c31d62] | 98 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure">../configure \
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[6dfcfecc] | 99 | --prefix=/usr \
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[9c31d62] | 100 | --host=$LFS_TGT \
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| 101 | --build=$(../scripts/config.guess) \
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| 102 | --enable-kernel=&min-kernel; \
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[6dfcfecc] | 103 | --with-headers=$LFS/usr/include \
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[9c31d62] | 104 | --enable-multi-arch \
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[d4b5218] | 105 | libc_cv_slibdir=/usr/lib</userinput></screen>
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[73aedd1d] | 106 |
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[1f7ca93] | 107 | <variablelist>
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| 108 | <title>The meaning of the configure options:</title>
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| 109 |
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[4e82d47] | 110 | <varlistentry>
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[418b038] | 111 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
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[4e82d47] | 112 | <listitem>
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| 113 | <para>The combined effect of these switches is that Glibc's build system
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[6dfcfecc] | 114 | configures itself to be cross-compiled, using the cross-linker and
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| 115 | cross-compiler in <filename class="directory">$LFS/tools</filename>.</para>
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[4e82d47] | 116 | </listitem>
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| 117 | </varlistentry>
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[1118b17] | 118 |
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[1f7ca93] | 119 | <varlistentry>
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[70cd9f32] | 120 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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[1f7ca93] | 121 | <listitem>
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| 122 | <para>This tells Glibc to compile the library with support
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[70cd9f32] | 123 | for &min-kernel; and later Linux kernels. Workarounds for older
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[3532721] | 124 | kernels are not enabled.</para>
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[1f7ca93] | 125 | </listitem>
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| 126 | </varlistentry>
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[1118b17] | 127 |
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[1f7ca93] | 128 | <varlistentry>
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[6dfcfecc] | 129 | <term><parameter>--with-headers=$LFS/usr/include</parameter></term>
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[1f7ca93] | 130 | <listitem>
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[6dfcfecc] | 131 | <para>This tells Glibc to compile itself against the headers
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| 132 | recently installed to the $LFS/usr/include directory, so that
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| 133 | it knows exactly what features the kernel has and can optimize
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| 134 | itself accordingly.</para>
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[4e82d47] | 135 | </listitem>
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| 136 | </varlistentry>
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[6dfcfecc] | 137 |
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[4e82d47] | 138 | <varlistentry>
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[d7a9421] | 139 | <term><parameter>libc_cv_slibdir=/usr/lib</parameter></term>
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[4e82d47] | 140 | <listitem>
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[d7a9421] | 141 | <para>This ensures that the library is installed in /usr/lib instead
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[f6820bb6] | 142 | of the default /lib64 on 64-bit machines.</para>
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[1f7ca93] | 143 | </listitem>
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| 144 | </varlistentry>
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| 145 |
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| 146 | </variablelist>
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| 147 |
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| 148 | <para>During this stage the following warning might appear:</para>
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| 149 |
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| 150 | <blockquote>
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| 151 | <screen><computeroutput>configure: WARNING:
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| 152 | *** These auxiliary programs are missing or
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[81fd230] | 153 | *** incompatible versions: msgfmt
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| 154 | *** some features will be disabled.
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[1f7ca93] | 155 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 156 | </blockquote>
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[81fd230] | 157 |
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[1f7ca93] | 158 | <para>The missing or incompatible <command>msgfmt</command> program is
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[5f7456b] | 159 | generally harmless. This <command>msgfmt</command> program is part of the
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[f6820bb6] | 160 | Gettext package, which the host distribution should provide.</para>
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[81fd230] | 161 |
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[a26f29f] | 162 | <note><para>There have been reports that this package may fail when
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[f6820bb6] | 163 | building as a "parallel make". If that occurs, rerun the make command
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| 164 | with the "-j1" option.</para></note>
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[7b1923d] | 165 |
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[1f7ca93] | 166 | <para>Compile the package:</para>
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[73aedd1d] | 167 |
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[0445a3d] | 168 | <screen><userinput remap="make">make</userinput></screen>
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[73aedd1d] | 169 |
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[1f7ca93] | 170 | <para>Install the package:</para>
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[73aedd1d] | 171 |
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[6dfcfecc] | 172 | <warning><para>If <envar>LFS</envar> is not properly set, and despite the
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[38de42d] | 173 | recommendations, you are building as
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| 174 | <systemitem class="username">root</systemitem>, the next command will
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[f6820bb6] | 175 | install the newly built Glibc to your host system, which will almost
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| 176 | certainly render it unusable. So double-check that the environment is
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| 177 | correctly set, and that you are not &root;, before running the following command.</para></warning>
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[6dfcfecc] | 178 |
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| 179 | <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
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| 180 |
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| 181 | <variablelist>
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| 182 | <title>The meaning of the <command>make install</command> option:</title>
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| 183 |
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| 184 | <varlistentry>
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| 185 | <term><parameter>DESTDIR=$LFS</parameter></term>
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| 186 | <listitem>
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| 187 | <para>The <envar>DESTDIR</envar> make variable is used by almost all
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| 188 | packages to define the location where the package should be
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| 189 | installed. If it is not set, it defaults to the root (<filename
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| 190 | class="directory">/</filename>) directory. Here we specify that
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[f6820bb6] | 191 | the package is installed in <filename class="directory">$LFS
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| 192 | </filename>, which will become the root directory in <xref linkend=
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[6dfcfecc] | 193 | "ch-tools-chroot"/>.</para>
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| 194 | </listitem>
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| 195 | </varlistentry>
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[73aedd1d] | 196 |
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[6dfcfecc] | 197 | </variablelist>
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| 198 |
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[f6820bb6] | 199 | <para>Fix a hard coded path to the executable loader in the
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[0ebda11] | 200 | <command>ldd</command> script:</para>
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| 201 |
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| 202 | <screen><userinput remap="install">sed '/RTLDLIST=/s@/usr@@g' -i $LFS/usr/bin/ldd</userinput></screen>
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| 203 |
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[6dfcfecc] | 204 | <caution>
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| 205 | <para>At this point, it is imperative to stop and ensure that the basic
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| 206 | functions (compiling and linking) of the new toolchain are working as
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| 207 | expected. To perform a sanity check, run the following commands:</para>
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[1a3e6a3] | 208 |
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[793f9087] | 209 | <screen><userinput>echo 'int main(){}' | $LFS_TGT-gcc -xc -
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[b3f157c6] | 210 | readelf -l a.out | grep ld-linux</userinput></screen>
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[1a3e6a3] | 211 |
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[6dfcfecc] | 212 | <para>If everything is working correctly, there should be no errors,
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| 213 | and the output of the last command will be of the form:</para>
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[1a3e6a3] | 214 |
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[6dfcfecc] | 215 | <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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[1a3e6a3] | 216 |
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[6dfcfecc] | 217 | <para arch="default">Note that for 32-bit machines, the interpreter name will be
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| 218 | <filename>/lib/ld-linux.so.2</filename>.</para>
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[1a3e6a3] | 219 |
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[f6820bb6] | 220 | <para>If the output is not as shown above, or there is no output at all,
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[6dfcfecc] | 221 | then something is wrong. Investigate and retrace the steps to find out
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| 222 | where the problem is and correct it. This issue must be resolved before
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[f6820bb6] | 223 | continuing.</para>
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[1a3e6a3] | 224 |
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[b3f157c6] | 225 | <para>Once all is well, clean up the test file:</para>
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[1a3e6a3] | 226 |
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[b3f157c6] | 227 | <screen><userinput>rm -v a.out</userinput></screen>
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[1a3e6a3] | 228 |
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[6dfcfecc] | 229 | </caution>
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[1a3e6a3] | 230 |
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[f6820bb6] | 231 | <note><para>Building the packages in the next chapter will serve as an
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[6dfcfecc] | 232 | additional check that the toolchain has been built properly. If some
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[f6820bb6] | 233 | package, especially Binutils-pass2 or GCC-pass2, fails to build, it is
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[6dfcfecc] | 234 | an indication that something has gone wrong with the
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[f6820bb6] | 235 | preceding Binutils, GCC, or Glibc installations.</para></note>
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[bd5b888] | 236 | <!--
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[6dfcfecc] | 237 | <para>Now that our cross-toolchain is complete, finalize the installation
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[f6820bb6] | 238 | of the limits.h header. To do this, run a utility provided by the GCC
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[6dfcfecc] | 239 | developers:</para>
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[bc82645e] | 240 |
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[6dfcfecc] | 241 | <screen><userinput>$LFS/tools/libexec/gcc/$LFS_TGT/&gcc-version;/install-tools/mkheaders</userinput></screen>
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[bd5b888] | 242 | -->
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[6dfcfecc] | 243 | </sect2>
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[e2ccc32] | 244 |
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[6dfcfecc] | 245 | <!-- - - - - - - - - - -->
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| 246 | <!-- Multilib - 32bit -->
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| 247 | <!-- - - - - - - - - - -->
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| 248 | <sect2 arch="ml_32,ml_all">
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| 249 | <title>Building Glibc - 32bit</title>
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| 250 |
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| 251 | <para>Now recompile for m32. The extracted source can be
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[0ebda11] | 252 | reused but needs to be cleaned before installing the m32
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[6dfcfecc] | 253 | version of Glibc.</para>
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| 254 |
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| 255 | <para>Clear the build directory and remove artefacts from
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| 256 | previous build:</para>
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| 257 |
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| 258 | <screen><userinput remap="pre">make clean
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| 259 | find .. -name "*.a" -delete</userinput></screen>
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| 260 |
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| 261 | <para>Configure Glibc for m32 with the following commands:</para>
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| 262 |
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| 263 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -m32" \
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| 264 | CXX="$LFS_TGT-g++ -m32" \
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| 265 | ../configure \
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| 266 | --prefix=/usr \
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| 267 | --host=$LFS_TGT32 \
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| 268 | --build=$(../scripts/config.guess) \
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| 269 | --enable-kernel=&min-kernel; \
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| 270 | --with-headers=$LFS/usr/include \
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| 271 | --enable-multi-arch \
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[0ebda11] | 272 | --libdir=/usr/lib32 \
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| 273 | --libexecdir=/usr/lib32 \
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[d4b5218] | 274 | libc_cv_slibdir=/usr/lib32</userinput></screen>
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[e2ccc32] | 275 |
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[6dfcfecc] | 276 | <para>Compile the package:</para>
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[e2ccc32] | 277 |
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[6dfcfecc] | 278 | <screen><userinput remap="make">make</userinput></screen>
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[e2ccc32] | 279 |
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[6dfcfecc] | 280 | <para>Install the package:</para>
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[e2ccc32] | 281 |
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[6dfcfecc] | 282 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 283 | cp -a DESTDIR/usr/lib32 $LFS/usr/
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[6dfcfecc] | 284 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-32.h \
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| 285 | $LFS/usr/include/gnu/
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[0ebda11] | 286 | ln -svf ../lib32/ld-linux.so.2 $LFS/lib/ld-linux.so.2</userinput></screen>
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| 287 |
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[b3f1ebb3] | 288 |
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[6dfcfecc] | 289 | <caution>
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| 290 | <para>At this point, it is imperative to stop and ensure that the basic
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| 291 | functions (compiling and linking) of the new toolchain are working as
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| 292 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 293 |
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[6dfcfecc] | 294 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 295 | $LFS_TGT-gcc -m32 dummy.c
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| 296 | readelf -l a.out | grep '/ld-linux'</userinput></screen>
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[b3f1ebb3] | 297 |
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[6dfcfecc] | 298 | <para>If everything is working correctly, there should be no errors,
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| 299 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 300 |
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[6dfcfecc] | 301 | <screen><computeroutput>[Requesting program interpreter: /lib/ld-linux.so.2]</computeroutput></screen>
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[e2ccc32] | 302 |
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[6dfcfecc] | 303 | <para>If the output is not shown as above or there was no output at all,
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| 304 | then something is wrong. Investigate and retrace the steps to find out
|
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| 305 | where the problem is and correct it. This issue must be resolved before
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| 306 | continuing on.</para>
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[e2ccc32] | 307 |
|
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[6dfcfecc] | 308 | <para>Once all is well, clean up the test files:</para>
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[e2ccc32] | 309 |
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[6dfcfecc] | 310 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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[e2ccc32] | 311 |
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[6dfcfecc] | 312 | </caution>
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[e2ccc32] | 313 |
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[6dfcfecc] | 314 | </sect2><!-- m32 -->
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[b3f1ebb3] | 315 |
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[6dfcfecc] | 316 | <!-- - - - - - - - - - -->
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| 317 | <!-- Multilib - x32bit -->
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| 318 | <!-- - - - - - - - - - -->
|
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| 319 |
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| 320 | <sect2 arch="ml_x32,ml_all">
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| 321 | <title>Building Glibc - x32bit</title>
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| 322 |
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| 323 | <para>Now recompile for mx32. The extracted source can be
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[0ebda11] | 324 | reused but needs to be cleaned before installing the mx32
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[6dfcfecc] | 325 | version of Glibc.</para>
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| 326 |
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| 327 | <para>Clear the build directory and remove artefacts from
|
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| 328 | previous build:</para>
|
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| 329 |
|
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| 330 | <screen><userinput remap="pre">make clean
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| 331 | find .. -name "*.a" -delete</userinput></screen>
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| 332 |
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| 333 | <para>Configure Glibc for mx32 with the following commands:</para>
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| 334 |
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| 335 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -mx32" \
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| 336 | CXX="$LFS_TGT-g++ -mx32" \
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| 337 | ../configure \
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| 338 | --prefix=/usr \
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| 339 | --host=$LFS_TGTX32 \
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| 340 | --build=$(../scripts/config.guess) \
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| 341 | --enable-kernel=&min-kernel; \
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| 342 | --with-headers=$LFS/usr/include \
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| 343 | --enable-multi-arch \
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[0ebda11] | 344 | --libdir=/usr/libx32 \
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| 345 | --libexecdir=/usr/libx32 \
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[d4b5218] | 346 | libc_cv_slibdir=/usr/libx32</userinput></screen>
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[b3f1ebb3] | 347 |
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[6dfcfecc] | 348 | <para>Compile the package:</para>
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| 349 |
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| 350 | <screen><userinput remap="make">make</userinput></screen>
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[b3f1ebb3] | 351 |
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[6dfcfecc] | 352 | <para>Install the package:</para>
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[b3f1ebb3] | 353 |
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[6dfcfecc] | 354 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 355 | cp -a DESTDIR/usr/libx32 $LFS/usr/
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[6dfcfecc] | 356 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-x32.h \
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| 357 | $LFS/usr/include/gnu/
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[0ebda11] | 358 | ln -svf ../libx32/ld-linux-x32.so.2 $LFS/lib/ld-linux-x32.so.2</userinput></screen>
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[b3f1ebb3] | 359 |
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[6dfcfecc] | 360 | <caution>
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| 361 | <para>At this point, it is imperative to stop and ensure that the basic
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| 362 | functions (compiling and linking) of the new toolchain are working as
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| 363 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 364 |
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| 365 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 366 | $LFS_TGT-gcc -mx32 dummy.c
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[6dfcfecc] | 367 | readelf -l a.out | grep '/ld-linux-x32'</userinput></screen>
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[b3f1ebb3] | 368 |
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[6dfcfecc] | 369 | <para>If everything is working correctly, there should be no errors,
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| 370 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 371 |
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[d7e0db5] | 372 | <screen><computeroutput>[Requesting program interpreter: /libx32/ld-linux-x32.so.2]</computeroutput></screen>
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[b3f1ebb3] | 373 |
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[6dfcfecc] | 374 | <para>If the output is not shown as above or there was no output at all,
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| 375 | then something is wrong. Investigate and retrace the steps to find out
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| 376 | where the problem is and correct it. This issue must be resolved before
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| 377 | continuing on.</para>
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[b3f1ebb3] | 378 |
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[6dfcfecc] | 379 | <para>Once all is well, clean up the test files:</para>
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[b3f1ebb3] | 380 |
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| 381 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 382 |
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[6dfcfecc] | 383 | </caution>
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| 384 |
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| 385 | </sect2><!-- mx32 -->
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| 386 |
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[1f7ca93] | 387 | <sect2 role="content">
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| 388 | <title/>
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[81fd230] | 389 |
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[1f7ca93] | 390 | <para>Details on this package are located in
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| 391 | <xref linkend="contents-glibc" role="."/></para>
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| 392 |
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| 393 | </sect2>
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[81fd230] | 394 |
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[1f7ca93] | 395 | </sect1>
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