[7152faa] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[b06ca36] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[673b0d8] | 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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[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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[ea93c11] | 65 | <command>info coreutils ln</command> and <ulink role='man'
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| 66 | url='&man;ln.1'>ln(1)</ulink> before reporting what may appear to be
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| 67 | an error.
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[0fc1b27] | 68 | </para>
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| 69 | </note>
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| 70 |
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[f6820bb6] | 71 | <para>Some of the Glibc programs use the non-FHS-compliant
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[6dfcfecc] | 72 | <filename class="directory">/var/db</filename> directory to store their
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| 73 | runtime data. Apply the following patch to make such programs store their
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| 74 | runtime data in the FHS-compliant locations:</para>
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| 75 |
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| 76 | <screen><userinput remap="pre">patch -Np1 -i ../glibc-&glibc-version;-fhs-1.patch</userinput></screen>
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| 77 |
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[a26f29f] | 78 | <para>The Glibc documentation recommends building Glibc
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[f1dd547] | 79 | in a dedicated build directory:</para>
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[9bda40d] | 80 |
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[f1dd547] | 81 | <screen><userinput remap="pre">mkdir -v build
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| 82 | cd build</userinput></screen>
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[f1c177f] | 83 |
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[4eee9cc] | 84 | <para>Ensure that the <command>ldconfig</command> and <command>sln</command>
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[bcb20b4] | 85 | utilities are installed into
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[4eee9cc] | 86 | <filename class="directory">/usr/sbin</filename>:</para>
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| 87 |
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| 88 | <screen><userinput remap="pre">echo "rootsbindir=/usr/sbin" > configparms</userinput></screen>
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| 89 |
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[1f7ca93] | 90 | <para>Next, prepare Glibc for compilation:</para>
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[73aedd1d] | 91 |
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[62a13d02] | 92 | <screen><userinput remap="configure">../configure \
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| 93 | --prefix=/usr \
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| 94 | --host=$LFS_TGT \
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| 95 | --build=$(../scripts/config.guess) \
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| 96 | --enable-kernel=&min-kernel; \
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| 97 | --with-headers=$LFS/usr/include \
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| 98 | --disable-nscd \
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| 99 | libc_cv_slibdir=/usr/lib</userinput></screen>
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| 100 | <!--
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[9c31d62] | 101 | <screen arch="default"><userinput remap="configure">../configure \
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[8778c71] | 102 | - -prefix=/usr \
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| 103 | - -host=$LFS_TGT \
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| 104 | - -build=$(../scripts/config.guess) \
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| 105 | - -enable-kernel=&min-kernel; \
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| 106 | - -with-headers=$LFS/usr/include \
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| 107 | - -disable-nscd \
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[d4b5218] | 108 | libc_cv_slibdir=/usr/lib</userinput></screen>
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[9c31d62] | 109 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure">../configure \
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[8778c71] | 110 | - -prefix=/usr \
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| 111 | - -host=$LFS_TGT \
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| 112 | - -build=$(../scripts/config.guess) \
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| 113 | - -enable-kernel=&min-kernel; \
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| 114 | - -with-headers=$LFS/usr/include \
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| 115 | - -disable-nscd \
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[d4b5218] | 116 | libc_cv_slibdir=/usr/lib</userinput></screen>
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[62a13d02] | 117 | -->
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[73aedd1d] | 118 |
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[1f7ca93] | 119 | <variablelist>
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| 120 | <title>The meaning of the configure options:</title>
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| 121 |
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[4e82d47] | 122 | <varlistentry>
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[418b038] | 123 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
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[4e82d47] | 124 | <listitem>
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| 125 | <para>The combined effect of these switches is that Glibc's build system
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[6dfcfecc] | 126 | configures itself to be cross-compiled, using the cross-linker and
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| 127 | cross-compiler in <filename class="directory">$LFS/tools</filename>.</para>
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[4e82d47] | 128 | </listitem>
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| 129 | </varlistentry>
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[1118b17] | 130 |
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[1f7ca93] | 131 | <varlistentry>
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[70cd9f32] | 132 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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[1f7ca93] | 133 | <listitem>
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| 134 | <para>This tells Glibc to compile the library with support
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[70cd9f32] | 135 | for &min-kernel; and later Linux kernels. Workarounds for older
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[3532721] | 136 | kernels are not enabled.</para>
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[1f7ca93] | 137 | </listitem>
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| 138 | </varlistentry>
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[1118b17] | 139 |
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[1f7ca93] | 140 | <varlistentry>
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[6dfcfecc] | 141 | <term><parameter>--with-headers=$LFS/usr/include</parameter></term>
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[1f7ca93] | 142 | <listitem>
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[6dfcfecc] | 143 | <para>This tells Glibc to compile itself against the headers
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| 144 | recently installed to the $LFS/usr/include directory, so that
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| 145 | it knows exactly what features the kernel has and can optimize
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| 146 | itself accordingly.</para>
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[4e82d47] | 147 | </listitem>
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| 148 | </varlistentry>
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[6dfcfecc] | 149 |
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[4e82d47] | 150 | <varlistentry>
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[d7a9421] | 151 | <term><parameter>libc_cv_slibdir=/usr/lib</parameter></term>
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[4e82d47] | 152 | <listitem>
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[d7a9421] | 153 | <para>This ensures that the library is installed in /usr/lib instead
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[f6820bb6] | 154 | of the default /lib64 on 64-bit machines.</para>
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[1f7ca93] | 155 | </listitem>
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| 156 | </varlistentry>
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| 157 |
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[25b3c0f] | 158 | <varlistentry>
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| 159 | <term><parameter>--disable-nscd</parameter></term>
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| 160 | <listitem>
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| 161 | <para>Do not build the name service cache daemon which is no
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| 162 | longer used.</para>
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| 163 | </listitem>
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| 164 | </varlistentry>
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| 165 |
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[1f7ca93] | 166 | </variablelist>
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| 167 |
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| 168 | <para>During this stage the following warning might appear:</para>
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| 169 |
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| 170 | <blockquote>
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| 171 | <screen><computeroutput>configure: WARNING:
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| 172 | *** These auxiliary programs are missing or
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[81fd230] | 173 | *** incompatible versions: msgfmt
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| 174 | *** some features will be disabled.
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[1f7ca93] | 175 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 176 | </blockquote>
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[81fd230] | 177 |
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[1f7ca93] | 178 | <para>The missing or incompatible <command>msgfmt</command> program is
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[5f7456b] | 179 | generally harmless. This <command>msgfmt</command> program is part of the
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[f6820bb6] | 180 | Gettext package, which the host distribution should provide.</para>
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[81fd230] | 181 |
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[a26f29f] | 182 | <note><para>There have been reports that this package may fail when
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[360fdfca] | 183 | building as a <quote>parallel make.</quote> If that occurs, rerun the make command
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| 184 | with the <option>-j1</option> option.</para></note>
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[7b1923d] | 185 |
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[1f7ca93] | 186 | <para>Compile the package:</para>
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[73aedd1d] | 187 |
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[0445a3d] | 188 | <screen><userinput remap="make">make</userinput></screen>
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[73aedd1d] | 189 |
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[1f7ca93] | 190 | <para>Install the package:</para>
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[73aedd1d] | 191 |
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[6dfcfecc] | 192 | <warning><para>If <envar>LFS</envar> is not properly set, and despite the
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[38de42d] | 193 | recommendations, you are building as
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| 194 | <systemitem class="username">root</systemitem>, the next command will
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[f6820bb6] | 195 | install the newly built Glibc to your host system, which will almost
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| 196 | certainly render it unusable. So double-check that the environment is
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| 197 | correctly set, and that you are not &root;, before running the following command.</para></warning>
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[6dfcfecc] | 198 |
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| 199 | <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
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| 200 |
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| 201 | <variablelist>
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| 202 | <title>The meaning of the <command>make install</command> option:</title>
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| 203 |
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| 204 | <varlistentry>
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| 205 | <term><parameter>DESTDIR=$LFS</parameter></term>
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| 206 | <listitem>
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| 207 | <para>The <envar>DESTDIR</envar> make variable is used by almost all
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| 208 | packages to define the location where the package should be
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| 209 | installed. If it is not set, it defaults to the root (<filename
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| 210 | class="directory">/</filename>) directory. Here we specify that
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[f6820bb6] | 211 | the package is installed in <filename class="directory">$LFS
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| 212 | </filename>, which will become the root directory in <xref linkend=
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[6dfcfecc] | 213 | "ch-tools-chroot"/>.</para>
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| 214 | </listitem>
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| 215 | </varlistentry>
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[73aedd1d] | 216 |
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[6dfcfecc] | 217 | </variablelist>
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| 218 |
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[f6820bb6] | 219 | <para>Fix a hard coded path to the executable loader in the
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[0ebda11] | 220 | <command>ldd</command> script:</para>
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| 221 |
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| 222 | <screen><userinput remap="install">sed '/RTLDLIST=/s@/usr@@g' -i $LFS/usr/bin/ldd</userinput></screen>
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| 223 |
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[6dfcfecc] | 224 | <caution>
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| 225 | <para>At this point, it is imperative to stop and ensure that the basic
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| 226 | functions (compiling and linking) of the new toolchain are working as
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| 227 | expected. To perform a sanity check, run the following commands:</para>
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[1a3e6a3] | 228 |
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[793f9087] | 229 | <screen><userinput>echo 'int main(){}' | $LFS_TGT-gcc -xc -
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[b3f157c6] | 230 | readelf -l a.out | grep ld-linux</userinput></screen>
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[1a3e6a3] | 231 |
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[6dfcfecc] | 232 | <para>If everything is working correctly, there should be no errors,
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| 233 | and the output of the last command will be of the form:</para>
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[1a3e6a3] | 234 |
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[6dfcfecc] | 235 | <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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[1a3e6a3] | 236 |
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[6dfcfecc] | 237 | <para arch="default">Note that for 32-bit machines, the interpreter name will be
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| 238 | <filename>/lib/ld-linux.so.2</filename>.</para>
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[1a3e6a3] | 239 |
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[f6820bb6] | 240 | <para>If the output is not as shown above, or there is no output at all,
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[6dfcfecc] | 241 | then something is wrong. Investigate and retrace the steps to find out
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| 242 | where the problem is and correct it. This issue must be resolved before
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[f6820bb6] | 243 | continuing.</para>
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[1a3e6a3] | 244 |
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[b3f157c6] | 245 | <para>Once all is well, clean up the test file:</para>
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[1a3e6a3] | 246 |
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[b3f157c6] | 247 | <screen><userinput>rm -v a.out</userinput></screen>
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[1a3e6a3] | 248 |
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[6dfcfecc] | 249 | </caution>
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[1a3e6a3] | 250 |
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[f6820bb6] | 251 | <note><para>Building the packages in the next chapter will serve as an
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[6dfcfecc] | 252 | additional check that the toolchain has been built properly. If some
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[f6820bb6] | 253 | package, especially Binutils-pass2 or GCC-pass2, fails to build, it is
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[6dfcfecc] | 254 | an indication that something has gone wrong with the
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[f6820bb6] | 255 | preceding Binutils, GCC, or Glibc installations.</para></note>
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[bd5b888] | 256 | <!--
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[6dfcfecc] | 257 | <para>Now that our cross-toolchain is complete, finalize the installation
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[f6820bb6] | 258 | of the limits.h header. To do this, run a utility provided by the GCC
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[6dfcfecc] | 259 | developers:</para>
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[bc82645e] | 260 |
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[6dfcfecc] | 261 | <screen><userinput>$LFS/tools/libexec/gcc/$LFS_TGT/&gcc-version;/install-tools/mkheaders</userinput></screen>
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[bd5b888] | 262 | -->
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[6dfcfecc] | 263 | </sect2>
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[e2ccc32] | 264 |
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[6dfcfecc] | 265 | <!-- - - - - - - - - - -->
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| 266 | <!-- Multilib - 32bit -->
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| 267 | <!-- - - - - - - - - - -->
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| 268 | <sect2 arch="ml_32,ml_all">
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| 269 | <title>Building Glibc - 32bit</title>
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| 270 |
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| 271 | <para>Now recompile for m32. The extracted source can be
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[0ebda11] | 272 | reused but needs to be cleaned before installing the m32
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[6dfcfecc] | 273 | version of Glibc.</para>
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| 274 |
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| 275 | <para>Clear the build directory and remove artefacts from
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| 276 | previous build:</para>
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| 277 |
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| 278 | <screen><userinput remap="pre">make clean
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| 279 | find .. -name "*.a" -delete</userinput></screen>
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| 280 |
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| 281 | <para>Configure Glibc for m32 with the following commands:</para>
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| 282 |
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| 283 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -m32" \
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| 284 | CXX="$LFS_TGT-g++ -m32" \
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| 285 | ../configure \
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| 286 | --prefix=/usr \
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| 287 | --host=$LFS_TGT32 \
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| 288 | --build=$(../scripts/config.guess) \
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| 289 | --enable-kernel=&min-kernel; \
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| 290 | --with-headers=$LFS/usr/include \
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[800ee38] | 291 | --disable-nscd \
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[0ebda11] | 292 | --libdir=/usr/lib32 \
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| 293 | --libexecdir=/usr/lib32 \
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[d4b5218] | 294 | libc_cv_slibdir=/usr/lib32</userinput></screen>
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[e2ccc32] | 295 |
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[6dfcfecc] | 296 | <para>Compile the package:</para>
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[e2ccc32] | 297 |
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[6dfcfecc] | 298 | <screen><userinput remap="make">make</userinput></screen>
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[e2ccc32] | 299 |
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[6dfcfecc] | 300 | <para>Install the package:</para>
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[e2ccc32] | 301 |
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[6dfcfecc] | 302 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 303 | cp -a DESTDIR/usr/lib32 $LFS/usr/
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[6dfcfecc] | 304 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-32.h \
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| 305 | $LFS/usr/include/gnu/
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[0ebda11] | 306 | ln -svf ../lib32/ld-linux.so.2 $LFS/lib/ld-linux.so.2</userinput></screen>
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| 307 |
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[b3f1ebb3] | 308 |
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[6dfcfecc] | 309 | <caution>
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| 310 | <para>At this point, it is imperative to stop and ensure that the basic
|
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| 311 | functions (compiling and linking) of the new toolchain are working as
|
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| 312 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 313 |
|
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[6dfcfecc] | 314 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 315 | $LFS_TGT-gcc -m32 dummy.c
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| 316 | readelf -l a.out | grep '/ld-linux'</userinput></screen>
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[b3f1ebb3] | 317 |
|
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[6dfcfecc] | 318 | <para>If everything is working correctly, there should be no errors,
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| 319 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 320 |
|
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[6dfcfecc] | 321 | <screen><computeroutput>[Requesting program interpreter: /lib/ld-linux.so.2]</computeroutput></screen>
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[e2ccc32] | 322 |
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[6dfcfecc] | 323 | <para>If the output is not shown as above or there was no output at all,
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| 324 | then something is wrong. Investigate and retrace the steps to find out
|
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| 325 | where the problem is and correct it. This issue must be resolved before
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| 326 | continuing on.</para>
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[e2ccc32] | 327 |
|
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[6dfcfecc] | 328 | <para>Once all is well, clean up the test files:</para>
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[e2ccc32] | 329 |
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[6dfcfecc] | 330 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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[e2ccc32] | 331 |
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[6dfcfecc] | 332 | </caution>
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[e2ccc32] | 333 |
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[6dfcfecc] | 334 | </sect2><!-- m32 -->
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[b3f1ebb3] | 335 |
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[6dfcfecc] | 336 | <!-- - - - - - - - - - -->
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| 337 | <!-- Multilib - x32bit -->
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| 338 | <!-- - - - - - - - - - -->
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| 339 |
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| 340 | <sect2 arch="ml_x32,ml_all">
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| 341 | <title>Building Glibc - x32bit</title>
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| 342 |
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| 343 | <para>Now recompile for mx32. The extracted source can be
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[0ebda11] | 344 | reused but needs to be cleaned before installing the mx32
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[6dfcfecc] | 345 | version of Glibc.</para>
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| 346 |
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| 347 | <para>Clear the build directory and remove artefacts from
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| 348 | previous build:</para>
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| 349 |
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| 350 | <screen><userinput remap="pre">make clean
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| 351 | find .. -name "*.a" -delete</userinput></screen>
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| 352 |
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| 353 | <para>Configure Glibc for mx32 with the following commands:</para>
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| 354 |
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| 355 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -mx32" \
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| 356 | CXX="$LFS_TGT-g++ -mx32" \
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| 357 | ../configure \
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| 358 | --prefix=/usr \
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| 359 | --host=$LFS_TGTX32 \
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| 360 | --build=$(../scripts/config.guess) \
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| 361 | --enable-kernel=&min-kernel; \
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| 362 | --with-headers=$LFS/usr/include \
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[800ee38] | 363 | --disable-nscd \
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[0ebda11] | 364 | --libdir=/usr/libx32 \
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| 365 | --libexecdir=/usr/libx32 \
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[d4b5218] | 366 | libc_cv_slibdir=/usr/libx32</userinput></screen>
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[b3f1ebb3] | 367 |
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[6dfcfecc] | 368 | <para>Compile the package:</para>
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| 369 |
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| 370 | <screen><userinput remap="make">make</userinput></screen>
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[b3f1ebb3] | 371 |
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[6dfcfecc] | 372 | <para>Install the package:</para>
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[b3f1ebb3] | 373 |
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[6dfcfecc] | 374 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 375 | cp -a DESTDIR/usr/libx32 $LFS/usr/
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[6dfcfecc] | 376 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-x32.h \
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| 377 | $LFS/usr/include/gnu/
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[0ebda11] | 378 | ln -svf ../libx32/ld-linux-x32.so.2 $LFS/lib/ld-linux-x32.so.2</userinput></screen>
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[b3f1ebb3] | 379 |
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[6dfcfecc] | 380 | <caution>
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| 381 | <para>At this point, it is imperative to stop and ensure that the basic
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| 382 | functions (compiling and linking) of the new toolchain are working as
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| 383 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 384 |
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| 385 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 386 | $LFS_TGT-gcc -mx32 dummy.c
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[6dfcfecc] | 387 | readelf -l a.out | grep '/ld-linux-x32'</userinput></screen>
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[b3f1ebb3] | 388 |
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[6dfcfecc] | 389 | <para>If everything is working correctly, there should be no errors,
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| 390 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 391 |
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[d7e0db5] | 392 | <screen><computeroutput>[Requesting program interpreter: /libx32/ld-linux-x32.so.2]</computeroutput></screen>
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[b3f1ebb3] | 393 |
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[6dfcfecc] | 394 | <para>If the output is not shown as above or there was no output at all,
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| 395 | then something is wrong. Investigate and retrace the steps to find out
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| 396 | where the problem is and correct it. This issue must be resolved before
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| 397 | continuing on.</para>
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[b3f1ebb3] | 398 |
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[6dfcfecc] | 399 | <para>Once all is well, clean up the test files:</para>
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[b3f1ebb3] | 400 |
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| 401 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 402 |
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[6dfcfecc] | 403 | </caution>
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| 404 |
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| 405 | </sect2><!-- mx32 -->
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| 406 |
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[1f7ca93] | 407 | <sect2 role="content">
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| 408 | <title/>
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[81fd230] | 409 |
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[1f7ca93] | 410 | <para>Details on this package are located in
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| 411 | <xref linkend="contents-glibc" role="."/></para>
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| 412 |
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| 413 | </sect2>
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[81fd230] | 414 |
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[1f7ca93] | 415 | </sect1>
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