| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 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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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-tools-glibc" role="wrap">
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| 9 | <?dbhtml filename="glibc.html"?>
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| 10 |
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| 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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| 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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| 26 |
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| 27 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 28 | href="../chapter06/glibc.xml"
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| 29 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
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| 30 |
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| 31 | <segmentedlist>
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| 32 | <segtitle>&buildtime;</segtitle>
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| 33 | <segtitle>&diskspace;</segtitle>
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| 34 |
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| 35 | <seglistitem>
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| 36 | <seg>&glibc-ch5-sbu;</seg>
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| 37 | <seg>&glibc-ch5-du;</seg>
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| 38 | </seglistitem>
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| 39 | </segmentedlist>
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| 40 |
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| 41 | </sect2>
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| 42 |
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| 43 | <sect2 role="installation">
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| 44 | <title>Installation of Glibc</title>
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| 45 |
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| 46 | <para>The Glibc documentation recommends building Glibc
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| 47 | in a dedicated build directory:</para>
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| 48 |
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| 49 | <screen><userinput remap="pre">mkdir -v build
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| 50 | cd build</userinput></screen>
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| 51 |
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| 52 | <para>Next, prepare Glibc for compilation:</para>
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| 53 |
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| 54 | <screen arch="default"><userinput remap="configure">../configure \
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| 55 | --prefix=/tools \
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| 56 | --host=$LFS_TGT \
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| 57 | --build=$(../scripts/config.guess) \
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| 58 | --enable-kernel=&min-kernel; \
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| 59 | --with-headers=/tools/include</userinput></screen>
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| 60 | <screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure">../configure \
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| 61 | --prefix=/tools \
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| 62 | --host=$LFS_TGT \
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| 63 | --build=$(../scripts/config.guess) \
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| 64 | --enable-kernel=&min-kernel; \
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| 65 | --enable-multi-arch \
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| 66 | --with-headers=/tools/include</userinput></screen>
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| 67 | <!--
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| 68 | libc_cv_forced_unwind=yes \
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| 69 | libc_cv_c_cleanup=yes</userinput></screen> -->
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| 70 |
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| 71 | <variablelist>
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| 72 | <title>The meaning of the configure options:</title>
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| 73 |
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| 74 | <varlistentry>
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| 75 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
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| 76 | <listitem>
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| 77 | <para>The combined effect of these switches is that Glibc's build system
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| 78 | configures itself to cross-compile, using the cross-linker and
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| 79 | cross-compiler in <filename class="directory">/tools</filename>.</para>
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| 80 | </listitem>
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| 81 | </varlistentry>
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| 82 |
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| 83 | <varlistentry>
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| 84 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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| 85 | <listitem>
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| 86 | <para>This tells Glibc to compile the library with support
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| 87 | for &min-kernel; and later Linux kernels. Workarounds for older
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| 88 | kernels are not enabled.</para>
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| 89 | </listitem>
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| 90 | </varlistentry>
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| 91 |
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| 92 | <varlistentry arch="ml_32,ml_x32,ml_all">
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| 93 | <term><parameter>--enable-multi-arch</parameter></term>
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| 94 | <listitem>
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| 95 | <para>Enables glibc for multiarch environments.</para>
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| 96 | </listitem>
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| 97 | </varlistentry>
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| 98 |
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| 99 | <varlistentry>
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| 100 | <term><parameter>--with-headers=/tools/include</parameter></term>
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| 101 | <listitem>
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| 102 | <para>This tells Glibc to compile itself against the headers recently
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| 103 | installed to the tools directory, so that it knows exactly what
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| 104 | features the kernel has and can optimize itself accordingly.</para>
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| 105 | </listitem>
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| 106 | </varlistentry>
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| 107 | <!--
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| 108 | <varlistentry>
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| 109 | <term><parameter>libc_cv_forced_unwind=yes</parameter></term>
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| 110 | <listitem>
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| 111 | <para>The linker installed during
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| 112 | <xref linkend="ch-tools-binutils-pass1"/> was cross-compiled and as
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| 113 | such cannot be used until Glibc has been installed. This means that
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| 114 | the configure test for force-unwind support will fail, as it relies on
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| 115 | a working linker. The libc_cv_forced_unwind=yes variable is passed in
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| 116 | order to inform <command>configure</command> that force-unwind
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| 117 | support is available without it having to run the test.</para>
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| 118 | </listitem>
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| 119 | </varlistentry>
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| 120 | <varlistentry>
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| 121 | <term><parameter>libc_cv_c_cleanup=yes</parameter></term>
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| 122 | <listitem>
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| 123 | <para>Similarly, we pass libc_cv_c_cleanup=yes through to the
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| 124 | <command>configure</command> script so that the test is skipped and C
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| 125 | cleanup handling support is configured.</para>
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| 126 | </listitem>
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| 127 | </varlistentry>
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| 128 | -->
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| 129 | <!-- <varlistentry>
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| 130 | <term><parameter>libc_cv_ctors_header=yes</parameter></term>
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| 131 | <listitem>
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| 132 | <para>Similarly, we pass libc_cv_ctors_header=yes through to the
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| 133 | <command>configure</command> script so that the test is skipped and
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| 134 | gcc constructor support is configured.</para>
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| 135 | </listitem>
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| 136 | </varlistentry>-->
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| 137 |
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| 138 | </variablelist>
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| 139 |
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| 140 | <para>During this stage the following warning might appear:</para>
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| 141 |
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| 142 | <blockquote>
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| 143 | <screen><computeroutput>configure: WARNING:
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| 144 | *** These auxiliary programs are missing or
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| 145 | *** incompatible versions: msgfmt
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| 146 | *** some features will be disabled.
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| 147 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 148 | </blockquote>
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| 149 |
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| 150 | <para>The missing or incompatible <command>msgfmt</command> program is
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| 151 | generally harmless. This <command>msgfmt</command> program is part of the
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| 152 | Gettext package which the host distribution should provide.</para>
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| 153 |
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| 154 | <note><para>There have been reports that this package may fail when
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| 155 | building as a "parallel make". If this occurs, rerun the make command
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| 156 | with a "-j1" option.</para></note>
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| 157 |
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| 158 | <para>Compile the package:</para>
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| 159 |
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| 160 | <screen><userinput remap="make">make</userinput></screen>
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| 161 |
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| 162 | <para>Install the package:</para>
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| 163 |
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| 164 | <screen><userinput remap="install">make install</userinput></screen>
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| 165 |
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| 166 | <caution>
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| 167 | <para>At this point, it is imperative to stop and ensure that the basic
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| 168 | functions (compiling and linking) of the new toolchain are working as
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| 169 | expected. To perform a sanity check, run the following commands:</para>
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| 170 |
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| 171 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 172 | $LFS_TGT-gcc dummy.c
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| 173 | readelf -l a.out | grep ': /tools'</userinput></screen>
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| 174 |
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| 175 | <para>If everything is working correctly, there should be no errors,
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| 176 | and the output of the last command will be of the form:</para>
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| 177 |
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| 178 | <screen><computeroutput>[Requesting program interpreter: /tools/lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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| 179 |
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| 180 | <para>Note that for 32-bit machines, the interpreter name will be
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| 181 | <filename>/tools/lib/ld-linux.so.2</filename>.</para>
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| 182 |
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| 183 | <para>If the output is not shown as above or there was no output at all,
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| 184 | then something is wrong. Investigate and retrace the steps to find out
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| 185 | where the problem is and correct it. This issue must be resolved before
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| 186 | continuing on.</para>
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| 187 |
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| 188 | <para>Once all is well, clean up the test files:</para>
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| 189 |
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| 190 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 191 |
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| 192 | </caution>
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| 193 |
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| 194 | <note><para>Building Binutils in the section after next will serve as an
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| 195 | additional check that the toolchain has been built properly. If Binutils
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| 196 | fails to build, it is an indication that something has gone wrong with the
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| 197 | previous Binutils, GCC, or Glibc installations.</para></note>
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| 198 |
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| 199 | </sect2>
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| 200 |
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| 201 | <sect2 arch="ml_32,ml_all" role="installation">
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| 202 | <title>Installation of Glibc 32-bit</title>
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| 203 |
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| 204 | <para>Clean the build directory for redoing glibc for 32-bit:</para>
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| 205 | <screen><userinput remap="pre">mkdir ../build32
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| 206 | cd ../build32</userinput></screen>
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| 207 |
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| 208 | <para>Rebuild glibc for 32-bit:</para>
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| 209 | <screen><userinput remap="configure">echo slibdir=/tools/lib32 > configparms
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| 210 | BUILD_CC="gcc -m32" \
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| 211 | CC="${LFS_TGT}-gcc -m32" \
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| 212 | CXX="${LFS_TGT}-g++ -m32" \
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| 213 | AR="${LFS_TGT}-ar" \
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| 214 | RANLIB="${LFS_TGT}-ranlib" \
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| 215 | ../configure --prefix=/tools \
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| 216 | --build=$(../scripts/config.guess) \
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| 217 | --host=${LFS_TGT32} \
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| 218 | --enable-kernel=&min-kernel; \
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| 219 | --with-headers=/tools/include \
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| 220 | --with-binutils=/tools/bin \
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| 221 | --enable-multi-arch \
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| 222 | --libdir=/tools/lib32 \
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| 223 | --libexecdir=/tools/lib32</userinput></screen>
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| 224 | <!-- \
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| 225 | libc_cv_forced_unwind=yes \
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| 226 | libc_cv_c_cleanup=yes</userinput></screen> -->
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| 227 |
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| 228 | <variablelist>
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| 229 | <title>The meaning of the extra configure options:</title>
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| 230 |
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| 231 | <varlistentry>
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| 232 | <term><parameter>--enable-multi-arch</parameter></term>
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| 233 | <listitem>
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| 234 | <para>Enables glibc for multiarch environments.</para>
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| 235 | </listitem>
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| 236 | </varlistentry>
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| 237 |
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| 238 | <varlistentry>
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| 239 | <term><parameter>--libdir=/tools/lib32, --libexecdir=/tools/lib32</parameter></term>
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| 240 | <listitem>
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| 241 | <para>Overrides location for installing 32-bit files.</para>
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| 242 | </listitem>
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| 243 | </varlistentry>
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| 244 |
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| 245 | <varlistentry>
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| 246 | <term><parameter>--with-binutils=/tools/bin</parameter></term>
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| 247 | <listitem>
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| 248 | <para>This tells Glibc to compile itself against the utilities
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| 249 | found within our "tools" heirachy, because otherwise...</para>
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| 250 | </listitem>
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| 251 | </varlistentry>
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| 252 |
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| 253 | </variablelist>
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| 254 |
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| 255 | <para>Now compile the 32-bit version of glibc:</para>
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| 256 | <screen><userinput remap="make">make</userinput></screen>
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| 257 |
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| 258 | <para>Install 32-bit version of glibc:</para>
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| 259 | <screen><userinput remap="install">make install_root="${PWD}/DESTDIR" install
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| 260 | install -vdm755 /tools/lib32
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| 261 | cp -Rv DESTDIR/tools/lib32/* /tools/lib32
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| 262 | install -vm644 DESTDIR/tools/include/gnu/{lib-names,stubs}-32.h \
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| 263 | /tools/include/gnu/
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| 264 | ln -svf /tools/lib32/ld-linux.so.2 /tools/lib/</userinput></screen>
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| 265 |
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| 266 | </sect2>
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| 267 |
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| 268 | <sect2 arch="ml_x32,ml_all" role="installation">
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| 269 | <title>Installation of Glibc x32-bit</title>
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| 270 |
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| 271 | <para>Create a build directory for redoing glibc for x32-bit:</para>
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| 272 | <screen><userinput remap="pre">mkdir ../build32x
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| 273 | cd ../build32x</userinput></screen>
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| 274 |
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| 275 | <para>Rebuild glibc for x32-bit:</para>
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| 276 | <screen><userinput remap="configure">echo slibdir=/tools/libx32 > configparms
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| 277 | BUILD_CC="gcc -mx32" \
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| 278 | CC="${LFS_TGT}-gcc -mx32" \
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| 279 | CXX="${LFS_TGT}-g++ -mx32" \
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| 280 | AR="${LFS_TGT}-ar" \
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| 281 | RANLIB="${LFS_TGT}-ranlib" \
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| 282 | ../configure --prefix=/tools \
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| 283 | --build=$(../scripts/config.guess) \
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| 284 | --host=${LFS_TGTX32} \
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| 285 | --enable-kernel=&min-kernel; \
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| 286 | --with-headers=/tools/include \
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| 287 | --with-binutils=/tools/bin \
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| 288 | --enable-multi-arch \
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| 289 | --libdir=/tools/libx32 \
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| 290 | --libexecdir=/tools/libx32</userinput></screen>
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| 291 | <!-- \
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| 292 | libc_cv_forced_unwind=yes \
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| 293 | libc_cv_c_cleanup=yes</userinput></screen> -->
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| 294 |
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| 295 | <variablelist>
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| 296 | <title>The meaning of the extra configure options:</title>
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| 297 |
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| 298 | <varlistentry>
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| 299 | <term><parameter>--enable-multi-arch</parameter></term>
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| 300 | <listitem>
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| 301 | <para>Enables glibc for multiarch environments.</para>
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| 302 | </listitem>
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| 303 | </varlistentry>
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| 304 |
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| 305 | <varlistentry>
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| 306 | <term><parameter>--libdir=/tools/libx32, --libexecdir=/tools/libx32</parameter></term>
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| 307 | <listitem>
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| 308 | <para>Overrides location for installing x32-bit files.</para>
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| 309 | </listitem>
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| 310 | </varlistentry>
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| 311 |
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| 312 | <varlistentry>
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| 313 | <term><parameter>--with-binutils=/tools/bin</parameter></term>
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| 314 | <listitem>
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| 315 | <para>This tells Glibc to compile itself against the utilities
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| 316 | found within our "tools" heirachy, because otherwise...</para>
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| 317 | </listitem>
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| 318 | </varlistentry>
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| 319 |
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| 320 | </variablelist>
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| 321 |
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| 322 | <para>Now compile the x32-bit version of glibc:</para>
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| 323 | <screen><userinput remap="make">make</userinput></screen>
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| 324 |
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| 325 | <para>Install x32-bit version of glibc:</para>
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| 326 | <screen><userinput remap="install">make install_root="${PWD}/DESTDIR" install
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| 327 | install -vdm755 /tools/libx32
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| 328 | cp -Rv DESTDIR/tools/libx32/* /tools/libx32
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| 329 | install -vm644 DESTDIR/tools/include/gnu/lib-names-x32.h \
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| 330 | /tools/include/gnu/
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| 331 | [ -e DESTDIR/tools/include/gnu/stubs-x32.h ] \
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| 332 | && install -vm644 DESTDIR/tools/include/gnu/stubs-x32.h /tools/include/gnu/ \
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| 333 | || ln -v /tools/include/gnu/stubs-64.h /tools/include/gnu/stubs-x32.h
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| 334 | ln -svf /tools/libx32/ld-linux-x32.so.2 /tools/lib/</userinput></screen>
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| 335 | <!-- For whatever reason the stubs-x32.h doesn't get created. The 'ln' above is
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| 336 | just a "brute force" workaraound - by copying the stubs-64.h file. -->
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| 337 |
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| 338 | <caution>
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| 339 | <para>At this point, it is imperative to stop and ensure that the basic
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| 340 | functions (compiling and linking) of the new toolchain are working as
|
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| 341 | expected. To perform a sanity check, run the following commands:</para>
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| 342 |
|
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| 343 | <screen><userinput>echo 'int main(){}' > dummy.c
|
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| 344 | $LFS_TGT-gcc -m32 dummy.c
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| 345 | readelf -l a.out | grep ': /tools'</userinput></screen>
|
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| 346 |
|
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| 347 | <para>If everything is working correctly, there should be no errors,
|
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| 348 | and the output of the last command will be of the form:</para>
|
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| 349 |
|
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| 350 | <screen><computeroutput>[Requesting program interpreter: /tools/lib/ld-linux.so.2]</computeroutput></screen>
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| 351 |
|
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| 352 | <para>Redo test for x32-ABI:</para>
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| 353 |
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| 354 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 355 | $LFS_TGT-gcc -mx32 dummy.c
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| 356 | readelf -l a.out | grep ': /tools'</userinput></screen>
|
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| 357 |
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| 358 | <para>Output should be like:</para>
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| 359 |
|
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| 360 | <screen><computeroutput>[Requesting program interpreter: /tools/libx32/ld-linux-x32.so.2]</computeroutput></screen>
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| 361 |
|
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| 362 | <para>If the output is not shown as above or there was no output at all,
|
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| 363 | then something is wrong. Investigate and retrace the steps to find out
|
|---|
| 364 | where the problem is and correct it. This issue must be resolved before
|
|---|
| 365 | continuing on.</para>
|
|---|
| 366 |
|
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| 367 | <para>Once all is well, clean up the test files:</para>
|
|---|
| 368 |
|
|---|
| 369 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 370 |
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| 371 | </caution>
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| 372 | </sect2>
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| 373 |
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| 374 | <sect2 role="content">
|
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| 375 | <title/>
|
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| 376 |
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| 377 | <para>Details on this package are located in
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| 378 | <xref linkend="contents-glibc" role="."/></para>
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| 379 |
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| 380 | </sect2>
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| 381 |
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| 382 | </sect1>
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