[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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[f33eca9] | 50 | <screen arch="default"><userinput remap="pre">case "$LFS_TGT" in
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| 51 | i?86-*) ln -sfv ld-linux.so.2 $LFS/lib/ld-lsb.so.3
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[6dfcfecc] | 52 | ;;
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[f33eca9] | 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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[6dfcfecc] | 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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[73aedd1d] | 100 |
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[1f7ca93] | 101 | <variablelist>
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| 102 | <title>The meaning of the configure options:</title>
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| 103 |
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[4e82d47] | 104 | <varlistentry>
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[418b038] | 105 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
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[4e82d47] | 106 | <listitem>
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| 107 | <para>The combined effect of these switches is that Glibc's build system
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[6dfcfecc] | 108 | configures itself to be cross-compiled, using the cross-linker and
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| 109 | cross-compiler in <filename class="directory">$LFS/tools</filename>.</para>
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[4e82d47] | 110 | </listitem>
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| 111 | </varlistentry>
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[1118b17] | 112 |
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[1f7ca93] | 113 | <varlistentry>
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[70cd9f32] | 114 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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[1f7ca93] | 115 | <listitem>
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| 116 | <para>This tells Glibc to compile the library with support
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[70cd9f32] | 117 | for &min-kernel; and later Linux kernels. Workarounds for older
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[3532721] | 118 | kernels are not enabled.</para>
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[1f7ca93] | 119 | </listitem>
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| 120 | </varlistentry>
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[1118b17] | 121 |
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[1f7ca93] | 122 | <varlistentry>
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[6dfcfecc] | 123 | <term><parameter>--with-headers=$LFS/usr/include</parameter></term>
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[1f7ca93] | 124 | <listitem>
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[6dfcfecc] | 125 | <para>This tells Glibc to compile itself against the headers
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| 126 | recently installed to the $LFS/usr/include directory, so that
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| 127 | it knows exactly what features the kernel has and can optimize
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| 128 | itself accordingly.</para>
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[4e82d47] | 129 | </listitem>
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| 130 | </varlistentry>
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[6dfcfecc] | 131 |
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[4e82d47] | 132 | <varlistentry>
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[d7a9421] | 133 | <term><parameter>libc_cv_slibdir=/usr/lib</parameter></term>
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[4e82d47] | 134 | <listitem>
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[d7a9421] | 135 | <para>This ensures that the library is installed in /usr/lib instead
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[f6820bb6] | 136 | of the default /lib64 on 64-bit machines.</para>
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[1f7ca93] | 137 | </listitem>
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| 138 | </varlistentry>
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| 139 |
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[25b3c0f] | 140 | <varlistentry>
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| 141 | <term><parameter>--disable-nscd</parameter></term>
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| 142 | <listitem>
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| 143 | <para>Do not build the name service cache daemon which is no
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| 144 | longer used.</para>
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| 145 | </listitem>
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| 146 | </varlistentry>
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| 147 |
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[1f7ca93] | 148 | </variablelist>
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| 149 |
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| 150 | <para>During this stage the following warning might appear:</para>
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| 151 |
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| 152 | <blockquote>
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| 153 | <screen><computeroutput>configure: WARNING:
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| 154 | *** These auxiliary programs are missing or
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[81fd230] | 155 | *** incompatible versions: msgfmt
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| 156 | *** some features will be disabled.
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[1f7ca93] | 157 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 158 | </blockquote>
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[81fd230] | 159 |
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[1f7ca93] | 160 | <para>The missing or incompatible <command>msgfmt</command> program is
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[5f7456b] | 161 | generally harmless. This <command>msgfmt</command> program is part of the
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[f6820bb6] | 162 | Gettext package, which the host distribution should provide.</para>
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[81fd230] | 163 |
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[a26f29f] | 164 | <note><para>There have been reports that this package may fail when
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[360fdfca] | 165 | building as a <quote>parallel make.</quote> If that occurs, rerun the make command
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| 166 | with the <option>-j1</option> option.</para></note>
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[7b1923d] | 167 |
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[1f7ca93] | 168 | <para>Compile the package:</para>
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[73aedd1d] | 169 |
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[0445a3d] | 170 | <screen><userinput remap="make">make</userinput></screen>
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[73aedd1d] | 171 |
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[1f7ca93] | 172 | <para>Install the package:</para>
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[73aedd1d] | 173 |
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[6dfcfecc] | 174 | <warning><para>If <envar>LFS</envar> is not properly set, and despite the
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[38de42d] | 175 | recommendations, you are building as
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| 176 | <systemitem class="username">root</systemitem>, the next command will
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[f6820bb6] | 177 | install the newly built Glibc to your host system, which will almost
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| 178 | certainly render it unusable. So double-check that the environment is
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| 179 | correctly set, and that you are not &root;, before running the following command.</para></warning>
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[6dfcfecc] | 180 |
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| 181 | <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
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| 182 |
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| 183 | <variablelist>
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| 184 | <title>The meaning of the <command>make install</command> option:</title>
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| 185 |
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| 186 | <varlistentry>
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| 187 | <term><parameter>DESTDIR=$LFS</parameter></term>
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| 188 | <listitem>
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| 189 | <para>The <envar>DESTDIR</envar> make variable is used by almost all
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| 190 | packages to define the location where the package should be
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| 191 | installed. If it is not set, it defaults to the root (<filename
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| 192 | class="directory">/</filename>) directory. Here we specify that
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[f6820bb6] | 193 | the package is installed in <filename class="directory">$LFS
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| 194 | </filename>, which will become the root directory in <xref linkend=
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[6dfcfecc] | 195 | "ch-tools-chroot"/>.</para>
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| 196 | </listitem>
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| 197 | </varlistentry>
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[73aedd1d] | 198 |
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[6dfcfecc] | 199 | </variablelist>
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| 200 |
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[f6820bb6] | 201 | <para>Fix a hard coded path to the executable loader in the
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[0ebda11] | 202 | <command>ldd</command> script:</para>
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| 203 |
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| 204 | <screen><userinput remap="install">sed '/RTLDLIST=/s@/usr@@g' -i $LFS/usr/bin/ldd</userinput></screen>
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| 205 |
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[6dfcfecc] | 206 | <caution>
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| 207 | <para>At this point, it is imperative to stop and ensure that the basic
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| 208 | functions (compiling and linking) of the new toolchain are working as
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| 209 | expected. To perform a sanity check, run the following commands:</para>
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[1a3e6a3] | 210 |
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[793f9087] | 211 | <screen><userinput>echo 'int main(){}' | $LFS_TGT-gcc -xc -
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[b3f157c6] | 212 | readelf -l a.out | grep ld-linux</userinput></screen>
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[1a3e6a3] | 213 |
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[6dfcfecc] | 214 | <para>If everything is working correctly, there should be no errors,
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| 215 | and the output of the last command will be of the form:</para>
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[1a3e6a3] | 216 |
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[6dfcfecc] | 217 | <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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[1a3e6a3] | 218 |
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[6dfcfecc] | 219 | <para arch="default">Note that for 32-bit machines, the interpreter name will be
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| 220 | <filename>/lib/ld-linux.so.2</filename>.</para>
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[1a3e6a3] | 221 |
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[f6820bb6] | 222 | <para>If the output is not as shown above, or there is no output at all,
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[6dfcfecc] | 223 | then something is wrong. Investigate and retrace the steps to find out
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| 224 | where the problem is and correct it. This issue must be resolved before
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[f6820bb6] | 225 | continuing.</para>
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[1a3e6a3] | 226 |
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[b3f157c6] | 227 | <para>Once all is well, clean up the test file:</para>
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[1a3e6a3] | 228 |
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[b3f157c6] | 229 | <screen><userinput>rm -v a.out</userinput></screen>
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[1a3e6a3] | 230 |
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[6dfcfecc] | 231 | </caution>
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[1a3e6a3] | 232 |
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[f6820bb6] | 233 | <note><para>Building the packages in the next chapter will serve as an
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[6dfcfecc] | 234 | additional check that the toolchain has been built properly. If some
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[f6820bb6] | 235 | package, especially Binutils-pass2 or GCC-pass2, fails to build, it is
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[6dfcfecc] | 236 | an indication that something has gone wrong with the
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[f6820bb6] | 237 | preceding Binutils, GCC, or Glibc installations.</para></note>
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[bd5b888] | 238 | <!--
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[6dfcfecc] | 239 | <para>Now that our cross-toolchain is complete, finalize the installation
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[f6820bb6] | 240 | of the limits.h header. To do this, run a utility provided by the GCC
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[6dfcfecc] | 241 | developers:</para>
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[bc82645e] | 242 |
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[6dfcfecc] | 243 | <screen><userinput>$LFS/tools/libexec/gcc/$LFS_TGT/&gcc-version;/install-tools/mkheaders</userinput></screen>
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[bd5b888] | 244 | -->
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[6dfcfecc] | 245 | </sect2>
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[e2ccc32] | 246 |
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[6dfcfecc] | 247 | <!-- - - - - - - - - - -->
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| 248 | <!-- Multilib - 32bit -->
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| 249 | <!-- - - - - - - - - - -->
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| 250 | <sect2 arch="ml_32,ml_all">
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| 251 | <title>Building Glibc - 32bit</title>
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| 252 |
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| 253 | <para>Now recompile for m32. The extracted source can be
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[0ebda11] | 254 | reused but needs to be cleaned before installing the m32
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[6dfcfecc] | 255 | version of Glibc.</para>
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| 256 |
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| 257 | <para>Clear the build directory and remove artefacts from
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| 258 | previous build:</para>
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| 259 |
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| 260 | <screen><userinput remap="pre">make clean
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| 261 | find .. -name "*.a" -delete</userinput></screen>
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| 262 |
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| 263 | <para>Configure Glibc for m32 with the following commands:</para>
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| 264 |
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| 265 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -m32" \
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| 266 | CXX="$LFS_TGT-g++ -m32" \
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| 267 | ../configure \
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| 268 | --prefix=/usr \
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| 269 | --host=$LFS_TGT32 \
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| 270 | --build=$(../scripts/config.guess) \
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| 271 | --enable-kernel=&min-kernel; \
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| 272 | --with-headers=$LFS/usr/include \
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[800ee38] | 273 | --disable-nscd \
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[0ebda11] | 274 | --libdir=/usr/lib32 \
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| 275 | --libexecdir=/usr/lib32 \
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[d4b5218] | 276 | libc_cv_slibdir=/usr/lib32</userinput></screen>
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[e2ccc32] | 277 |
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[6dfcfecc] | 278 | <para>Compile the package:</para>
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[e2ccc32] | 279 |
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[6dfcfecc] | 280 | <screen><userinput remap="make">make</userinput></screen>
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[e2ccc32] | 281 |
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[6dfcfecc] | 282 | <para>Install the package:</para>
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[e2ccc32] | 283 |
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[6dfcfecc] | 284 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 285 | cp -a DESTDIR/usr/lib32 $LFS/usr/
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[6dfcfecc] | 286 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-32.h \
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| 287 | $LFS/usr/include/gnu/
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[0ebda11] | 288 | ln -svf ../lib32/ld-linux.so.2 $LFS/lib/ld-linux.so.2</userinput></screen>
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| 289 |
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[b3f1ebb3] | 290 |
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[6dfcfecc] | 291 | <caution>
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| 292 | <para>At this point, it is imperative to stop and ensure that the basic
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| 293 | functions (compiling and linking) of the new toolchain are working as
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| 294 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 295 |
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[6dfcfecc] | 296 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 297 | $LFS_TGT-gcc -m32 dummy.c
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| 298 | readelf -l a.out | grep '/ld-linux'</userinput></screen>
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[b3f1ebb3] | 299 |
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[6dfcfecc] | 300 | <para>If everything is working correctly, there should be no errors,
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| 301 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 302 |
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[6dfcfecc] | 303 | <screen><computeroutput>[Requesting program interpreter: /lib/ld-linux.so.2]</computeroutput></screen>
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[e2ccc32] | 304 |
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[6dfcfecc] | 305 | <para>If the output is not shown as above or there was no output at all,
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| 306 | then something is wrong. Investigate and retrace the steps to find out
|
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| 307 | where the problem is and correct it. This issue must be resolved before
|
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| 308 | continuing on.</para>
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[e2ccc32] | 309 |
|
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[6dfcfecc] | 310 | <para>Once all is well, clean up the test files:</para>
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[e2ccc32] | 311 |
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[6dfcfecc] | 312 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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[e2ccc32] | 313 |
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[6dfcfecc] | 314 | </caution>
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[e2ccc32] | 315 |
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[6dfcfecc] | 316 | </sect2><!-- m32 -->
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[b3f1ebb3] | 317 |
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[6dfcfecc] | 318 | <!-- - - - - - - - - - -->
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| 319 | <!-- Multilib - x32bit -->
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| 320 | <!-- - - - - - - - - - -->
|
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| 321 |
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| 322 | <sect2 arch="ml_x32,ml_all">
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| 323 | <title>Building Glibc - x32bit</title>
|
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| 324 |
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| 325 | <para>Now recompile for mx32. The extracted source can be
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[0ebda11] | 326 | reused but needs to be cleaned before installing the mx32
|
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[6dfcfecc] | 327 | version of Glibc.</para>
|
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| 328 |
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| 329 | <para>Clear the build directory and remove artefacts from
|
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| 330 | previous build:</para>
|
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| 331 |
|
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| 332 | <screen><userinput remap="pre">make clean
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| 333 | find .. -name "*.a" -delete</userinput></screen>
|
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| 334 |
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| 335 | <para>Configure Glibc for mx32 with the following commands:</para>
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| 336 |
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| 337 | <screen><userinput remap="configure">CC="$LFS_TGT-gcc -mx32" \
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| 338 | CXX="$LFS_TGT-g++ -mx32" \
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| 339 | ../configure \
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| 340 | --prefix=/usr \
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| 341 | --host=$LFS_TGTX32 \
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| 342 | --build=$(../scripts/config.guess) \
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| 343 | --enable-kernel=&min-kernel; \
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| 344 | --with-headers=$LFS/usr/include \
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[800ee38] | 345 | --disable-nscd \
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[0ebda11] | 346 | --libdir=/usr/libx32 \
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| 347 | --libexecdir=/usr/libx32 \
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[d4b5218] | 348 | libc_cv_slibdir=/usr/libx32</userinput></screen>
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[b3f1ebb3] | 349 |
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[6dfcfecc] | 350 | <para>Compile the package:</para>
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| 351 |
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| 352 | <screen><userinput remap="make">make</userinput></screen>
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[b3f1ebb3] | 353 |
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[6dfcfecc] | 354 | <para>Install the package:</para>
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[b3f1ebb3] | 355 |
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[6dfcfecc] | 356 | <screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
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[0ebda11] | 357 | cp -a DESTDIR/usr/libx32 $LFS/usr/
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[6dfcfecc] | 358 | install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-x32.h \
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| 359 | $LFS/usr/include/gnu/
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[0ebda11] | 360 | ln -svf ../libx32/ld-linux-x32.so.2 $LFS/lib/ld-linux-x32.so.2</userinput></screen>
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[b3f1ebb3] | 361 |
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[6dfcfecc] | 362 | <caution>
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| 363 | <para>At this point, it is imperative to stop and ensure that the basic
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| 364 | functions (compiling and linking) of the new toolchain are working as
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| 365 | expected. To perform a sanity check, run the following commands:</para>
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[b3f1ebb3] | 366 |
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| 367 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 368 | $LFS_TGT-gcc -mx32 dummy.c
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[6dfcfecc] | 369 | readelf -l a.out | grep '/ld-linux-x32'</userinput></screen>
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[b3f1ebb3] | 370 |
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[6dfcfecc] | 371 | <para>If everything is working correctly, there should be no errors,
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| 372 | and the output of the last command will be of the form:</para>
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[b3f1ebb3] | 373 |
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[d7e0db5] | 374 | <screen><computeroutput>[Requesting program interpreter: /libx32/ld-linux-x32.so.2]</computeroutput></screen>
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[b3f1ebb3] | 375 |
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[6dfcfecc] | 376 | <para>If the output is not shown as above or there was no output at all,
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| 377 | then something is wrong. Investigate and retrace the steps to find out
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| 378 | where the problem is and correct it. This issue must be resolved before
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| 379 | continuing on.</para>
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[b3f1ebb3] | 380 |
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[6dfcfecc] | 381 | <para>Once all is well, clean up the test files:</para>
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[b3f1ebb3] | 382 |
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| 383 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 384 |
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[6dfcfecc] | 385 | </caution>
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| 386 |
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| 387 | </sect2><!-- mx32 -->
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| 388 |
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[1f7ca93] | 389 | <sect2 role="content">
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| 390 | <title/>
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[81fd230] | 391 |
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[1f7ca93] | 392 | <para>Details on this package are located in
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| 393 | <xref linkend="contents-glibc" role="."/></para>
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| 394 |
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| 395 | </sect2>
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[81fd230] | 396 |
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[1f7ca93] | 397 | </sect1>
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