[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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[fcc02767] | 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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[fb386e0] | 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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[d125a6b] | 46 | <para>First, create a symbolic link for LSB compliance. Additionally,
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| 47 | for x86_64, create a compatibility symbolic link required for proper
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[efcb393] | 48 | operation of the dynamic library loader:</para>
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| 49 |
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[d125a6b] | 50 | <screen><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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[efcb393] | 57 |
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[0fc1b27] | 58 | <note>
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| 59 | <para>
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| 60 | The above command is correct. The <command>ln</command> command has
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[f6820bb6] | 61 | several syntactic versions, so be sure to check
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[ea93c11] | 62 | <command>info coreutils ln</command> and <ulink role='man'
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| 63 | url='&man;ln.1'>ln(1)</ulink> before reporting what may appear to be
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| 64 | an error.
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[0fc1b27] | 65 | </para>
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| 66 | </note>
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| 67 |
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[f6820bb6] | 68 | <para>Some of the Glibc programs use the non-FHS-compliant
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[efcb393] | 69 | <filename class="directory">/var/db</filename> directory to store their
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| 70 | runtime data. Apply the following patch to make such programs store their
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| 71 | runtime data in the FHS-compliant locations:</para>
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| 72 |
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| 73 | <screen><userinput remap="pre">patch -Np1 -i ../glibc-&glibc-version;-fhs-1.patch</userinput></screen>
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| 74 |
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[a26f29f] | 75 | <para>The Glibc documentation recommends building Glibc
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[f1dd547] | 76 | in a dedicated build directory:</para>
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[9bda40d] | 77 |
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[f1dd547] | 78 | <screen><userinput remap="pre">mkdir -v build
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| 79 | cd build</userinput></screen>
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[f1c177f] | 80 |
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[4eee9cc] | 81 | <para>Ensure that the <command>ldconfig</command> and <command>sln</command>
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[bcb20b4] | 82 | utilities are installed into
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[4eee9cc] | 83 | <filename class="directory">/usr/sbin</filename>:</para>
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| 84 |
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| 85 | <screen><userinput remap="pre">echo "rootsbindir=/usr/sbin" > configparms</userinput></screen>
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| 86 |
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[1f7ca93] | 87 | <para>Next, prepare Glibc for compilation:</para>
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[73aedd1d] | 88 |
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[63df8c7] | 89 | <screen><userinput remap="configure">../configure \
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[efcb393] | 90 | --prefix=/usr \
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[63df8c7] | 91 | --host=$LFS_TGT \
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| 92 | --build=$(../scripts/config.guess) \
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[0f18f2b] | 93 | --enable-kernel=&min-kernel; \
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[efcb393] | 94 | --with-headers=$LFS/usr/include \
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[25b3c0f] | 95 | --disable-nscd \
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[7f25c84] | 96 | libc_cv_slibdir=/usr/lib</userinput></screen>
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[73aedd1d] | 97 |
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[1f7ca93] | 98 | <variablelist>
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| 99 | <title>The meaning of the configure options:</title>
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| 100 |
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[4e82d47] | 101 | <varlistentry>
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[418b038] | 102 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
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[4e82d47] | 103 | <listitem>
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| 104 | <para>The combined effect of these switches is that Glibc's build system
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[efcb393] | 105 | configures itself to be cross-compiled, using the cross-linker and
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[d9cdc3e] | 106 | cross-compiler in <filename class="directory">$LFS/tools</filename>.</para>
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[4e82d47] | 107 | </listitem>
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| 108 | </varlistentry>
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[1118b17] | 109 |
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[1f7ca93] | 110 | <varlistentry>
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[70cd9f32] | 111 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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[1f7ca93] | 112 | <listitem>
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| 113 | <para>This tells Glibc to compile the library with support
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[70cd9f32] | 114 | for &min-kernel; and later Linux kernels. Workarounds for older
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[3532721] | 115 | kernels are not enabled.</para>
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[1f7ca93] | 116 | </listitem>
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| 117 | </varlistentry>
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[1118b17] | 118 |
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[1f7ca93] | 119 | <varlistentry>
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[efcb393] | 120 | <term><parameter>--with-headers=$LFS/usr/include</parameter></term>
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[1f7ca93] | 121 | <listitem>
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[77d2cd8d] | 122 | <para>This tells Glibc to compile itself against the headers
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| 123 | recently installed to the $LFS/usr/include directory, so that
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| 124 | it knows exactly what features the kernel has and can optimize
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| 125 | itself accordingly.</para>
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[1f7ca93] | 126 | </listitem>
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| 127 | </varlistentry>
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[efcb393] | 128 |
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[1f7ca93] | 129 | <varlistentry>
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[d7a9421] | 130 | <term><parameter>libc_cv_slibdir=/usr/lib</parameter></term>
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[1f7ca93] | 131 | <listitem>
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[d7a9421] | 132 | <para>This ensures that the library is installed in /usr/lib instead
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[f6820bb6] | 133 | of the default /lib64 on 64-bit machines.</para>
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[4e82d47] | 134 | </listitem>
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| 135 | </varlistentry>
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[1f7ca93] | 136 |
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[25b3c0f] | 137 | <varlistentry>
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| 138 | <term><parameter>--disable-nscd</parameter></term>
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| 139 | <listitem>
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| 140 | <para>Do not build the name service cache daemon which is no
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| 141 | longer used.</para>
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| 142 | </listitem>
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| 143 | </varlistentry>
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| 144 |
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[1f7ca93] | 145 | </variablelist>
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| 146 |
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| 147 | <para>During this stage the following warning might appear:</para>
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| 148 |
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| 149 | <blockquote>
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| 150 | <screen><computeroutput>configure: WARNING:
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| 151 | *** These auxiliary programs are missing or
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[81fd230] | 152 | *** incompatible versions: msgfmt
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| 153 | *** some features will be disabled.
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[1f7ca93] | 154 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 155 | </blockquote>
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[81fd230] | 156 |
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[1f7ca93] | 157 | <para>The missing or incompatible <command>msgfmt</command> program is
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[5f7456b] | 158 | generally harmless. This <command>msgfmt</command> program is part of the
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[f6820bb6] | 159 | Gettext package, which the host distribution should provide.</para>
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[81fd230] | 160 |
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[a26f29f] | 161 | <note><para>There have been reports that this package may fail when
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[360fdfca] | 162 | building as a <quote>parallel make.</quote> If that occurs, rerun the make command
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| 163 | with the <option>-j1</option> option.</para></note>
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[7b1923d] | 164 |
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[1f7ca93] | 165 | <para>Compile the package:</para>
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[73aedd1d] | 166 |
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[0445a3d] | 167 | <screen><userinput remap="make">make</userinput></screen>
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[73aedd1d] | 168 |
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[1f7ca93] | 169 | <para>Install the package:</para>
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[73aedd1d] | 170 |
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[6a156bab] | 171 | <warning><para>If <envar>LFS</envar> is not properly set, and despite the
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[34fe7e0] | 172 | recommendations, you are building as
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| 173 | <systemitem class="username">root</systemitem>, the next command will
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[f6820bb6] | 174 | install the newly built Glibc to your host system, which will almost
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| 175 | certainly render it unusable. So double-check that the environment is
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| 176 | correctly set, and that you are not &root;, before running the following command.</para></warning>
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[192c668] | 177 |
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[efcb393] | 178 | <screen><userinput remap="install">make DESTDIR=$LFS install</userinput></screen>
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| 179 |
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| 180 | <variablelist>
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| 181 | <title>The meaning of the <command>make install</command> option:</title>
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| 182 |
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| 183 | <varlistentry>
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| 184 | <term><parameter>DESTDIR=$LFS</parameter></term>
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| 185 | <listitem>
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| 186 | <para>The <envar>DESTDIR</envar> make variable is used by almost all
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| 187 | packages to define the location where the package should be
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| 188 | installed. If it is not set, it defaults to the root (<filename
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| 189 | class="directory">/</filename>) directory. Here we specify that
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[f6820bb6] | 190 | the package is installed in <filename class="directory">$LFS
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| 191 | </filename>, which will become the root directory in <xref linkend=
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[efcb393] | 192 | "ch-tools-chroot"/>.</para>
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| 193 | </listitem>
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| 194 | </varlistentry>
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| 195 |
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| 196 | </variablelist>
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[1b1acbed] | 197 |
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[f6820bb6] | 198 | <para>Fix a hard coded path to the executable loader in the
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[7bf2e85] | 199 | <command>ldd</command> script:</para>
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| 200 |
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| 201 | <screen><userinput remap="install">sed '/RTLDLIST=/s@/usr@@g' -i $LFS/usr/bin/ldd</userinput></screen>
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[1b1acbed] | 202 |
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[efcb393] | 203 | <caution>
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| 204 | <para>At this point, it is imperative to stop and ensure that the basic
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| 205 | functions (compiling and linking) of the new toolchain are working as
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| 206 | expected. To perform a sanity check, run the following commands:</para>
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[1a3e6a3] | 207 |
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[793f9087] | 208 | <screen><userinput>echo 'int main(){}' | $LFS_TGT-gcc -xc -
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[b3f157c6] | 209 | readelf -l a.out | grep ld-linux</userinput></screen>
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[1a3e6a3] | 210 |
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[efcb393] | 211 | <para>If everything is working correctly, there should be no errors,
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| 212 | and the output of the last command will be of the form:</para>
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[1a3e6a3] | 213 |
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[efcb393] | 214 | <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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[1a3e6a3] | 215 |
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[efcb393] | 216 | <para>Note that for 32-bit machines, the interpreter name will be
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| 217 | <filename>/lib/ld-linux.so.2</filename>.</para>
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[1a3e6a3] | 218 |
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[f6820bb6] | 219 | <para>If the output is not as shown above, or there is no output at all,
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[efcb393] | 220 | then something is wrong. Investigate and retrace the steps to find out
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| 221 | where the problem is and correct it. This issue must be resolved before
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[f6820bb6] | 222 | continuing.</para>
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[1a3e6a3] | 223 |
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[b3f157c6] | 224 | <para>Once all is well, clean up the test file:</para>
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[1a3e6a3] | 225 |
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[b3f157c6] | 226 | <screen><userinput>rm -v a.out</userinput></screen>
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[1a3e6a3] | 227 |
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[efcb393] | 228 | </caution>
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| 229 |
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[f6820bb6] | 230 | <note><para>Building the packages in the next chapter will serve as an
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[efcb393] | 231 | additional check that the toolchain has been built properly. If some
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[f6820bb6] | 232 | package, especially Binutils-pass2 or GCC-pass2, fails to build, it is
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[efcb393] | 233 | an indication that something has gone wrong with the
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[f6820bb6] | 234 | preceding Binutils, GCC, or Glibc installations.</para></note>
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[bd5b888] | 235 | <!--
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[efcb393] | 236 | <para>Now that our cross-toolchain is complete, finalize the installation
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[f6820bb6] | 237 | of the limits.h header. To do this, run a utility provided by the GCC
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[efcb393] | 238 | developers:</para>
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[1a3e6a3] | 239 |
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[efcb393] | 240 | <screen><userinput>$LFS/tools/libexec/gcc/$LFS_TGT/&gcc-version;/install-tools/mkheaders</userinput></screen>
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[bd5b888] | 241 | -->
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[1f7ca93] | 242 | </sect2>
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[bc82645e] | 243 |
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[1f7ca93] | 244 | <sect2 role="content">
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| 245 | <title/>
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[81fd230] | 246 |
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[1f7ca93] | 247 | <para>Details on this package are located in
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| 248 | <xref linkend="contents-glibc" role="."/></para>
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| 249 |
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| 250 | </sect2>
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[81fd230] | 251 |
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[1f7ca93] | 252 | </sect1>
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