[1fa2099] | 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><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 | <!--
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| 61 | libc_cv_forced_unwind=yes \
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| 62 | libc_cv_c_cleanup=yes</userinput></screen> -->
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| 63 |
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| 64 | <variablelist>
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| 65 | <title>The meaning of the configure options:</title>
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| 66 |
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| 67 | <varlistentry>
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| 68 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
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| 69 | <listitem>
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| 70 | <para>The combined effect of these switches is that Glibc's build system
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| 71 | configures itself to cross-compile, using the cross-linker and
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| 72 | cross-compiler in <filename class="directory">/tools</filename>.</para>
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| 73 | </listitem>
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| 74 | </varlistentry>
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| 75 |
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| 76 | <varlistentry>
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| 77 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
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| 78 | <listitem>
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| 79 | <para>This tells Glibc to compile the library with support
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| 80 | for &min-kernel; and later Linux kernels. Workarounds for older
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| 81 | kernels are not enabled.</para>
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| 82 | </listitem>
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| 83 | </varlistentry>
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| 84 |
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[ee1a413] | 85 | <varlistentry arch="ml_32,ml_x32,ml_all">
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[8eb3fe4] | 86 | <term><parameter>--enable-multi-arch</parameter></term>
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| 87 | <listitem>
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| 88 | <para>Enables glibc for multiarch environments.</para>
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| 89 | </listitem>
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| 90 | </varlistentry>
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| 91 |
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[1fa2099] | 92 | <varlistentry>
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| 93 | <term><parameter>--with-headers=/tools/include</parameter></term>
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| 94 | <listitem>
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| 95 | <para>This tells Glibc to compile itself against the headers recently
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| 96 | installed to the tools directory, so that it knows exactly what
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| 97 | features the kernel has and can optimize itself accordingly.</para>
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| 98 | </listitem>
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| 99 | </varlistentry>
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| 100 | <!--
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| 101 | <varlistentry>
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| 102 | <term><parameter>libc_cv_forced_unwind=yes</parameter></term>
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| 103 | <listitem>
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| 104 | <para>The linker installed during
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| 105 | <xref linkend="ch-tools-binutils-pass1"/> was cross-compiled and as
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| 106 | such cannot be used until Glibc has been installed. This means that
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| 107 | the configure test for force-unwind support will fail, as it relies on
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| 108 | a working linker. The libc_cv_forced_unwind=yes variable is passed in
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| 109 | order to inform <command>configure</command> that force-unwind
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| 110 | support is available without it having to run the test.</para>
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| 111 | </listitem>
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| 112 | </varlistentry>
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| 113 | <varlistentry>
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| 114 | <term><parameter>libc_cv_c_cleanup=yes</parameter></term>
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| 115 | <listitem>
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| 116 | <para>Similarly, we pass libc_cv_c_cleanup=yes through to the
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| 117 | <command>configure</command> script so that the test is skipped and C
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| 118 | cleanup handling support is configured.</para>
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| 119 | </listitem>
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| 120 | </varlistentry>
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| 121 | -->
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| 122 | <!-- <varlistentry>
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| 123 | <term><parameter>libc_cv_ctors_header=yes</parameter></term>
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| 124 | <listitem>
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| 125 | <para>Similarly, we pass libc_cv_ctors_header=yes through to the
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| 126 | <command>configure</command> script so that the test is skipped and
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| 127 | gcc constructor support is configured.</para>
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| 128 | </listitem>
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| 129 | </varlistentry>-->
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| 130 |
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| 131 | </variablelist>
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| 132 |
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| 133 | <para>During this stage the following warning might appear:</para>
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| 134 |
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| 135 | <blockquote>
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| 136 | <screen><computeroutput>configure: WARNING:
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| 137 | *** These auxiliary programs are missing or
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| 138 | *** incompatible versions: msgfmt
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| 139 | *** some features will be disabled.
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| 140 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 141 | </blockquote>
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| 142 |
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| 143 | <para>The missing or incompatible <command>msgfmt</command> program is
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| 144 | generally harmless. This <command>msgfmt</command> program is part of the
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| 145 | Gettext package which the host distribution should provide.</para>
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| 146 |
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| 147 | <note><para>There have been reports that this package may fail when
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| 148 | building as a "parallel make". If this occurs, rerun the make command
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| 149 | with a "-j1" option.</para></note>
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| 150 |
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| 151 | <para>Compile the package:</para>
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| 152 |
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| 153 | <screen><userinput remap="make">make</userinput></screen>
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| 154 |
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| 155 | <para>Install the package:</para>
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| 156 |
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| 157 | <screen><userinput remap="install">make install</userinput></screen>
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| 158 |
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| 159 | <caution>
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| 160 | <para>At this point, it is imperative to stop and ensure that the basic
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| 161 | functions (compiling and linking) of the new toolchain are working as
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| 162 | expected. To perform a sanity check, run the following commands:</para>
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| 163 |
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| 164 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 165 | $LFS_TGT-gcc dummy.c
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| 166 | readelf -l a.out | grep ': /tools'</userinput></screen>
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| 167 |
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| 168 | <para>If everything is working correctly, there should be no errors,
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| 169 | and the output of the last command will be of the form:</para>
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| 170 |
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| 171 | <screen><computeroutput>[Requesting program interpreter: /tools/lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
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| 172 |
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| 173 | <para>Note that for 32-bit machines, the interpreter name will be
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| 174 | <filename>/tools/lib/ld-linux.so.2</filename>.</para>
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| 175 |
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| 176 | <para>If the output is not shown as above or there was no output at all,
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| 177 | then something is wrong. Investigate and retrace the steps to find out
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| 178 | where the problem is and correct it. This issue must be resolved before
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| 179 | continuing on.</para>
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| 180 |
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| 181 | <para>Once all is well, clean up the test files:</para>
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| 182 |
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| 183 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 184 |
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| 185 | </caution>
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| 186 |
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| 187 | <note><para>Building Binutils in the section after next will serve as an
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| 188 | additional check that the toolchain has been built properly. If Binutils
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| 189 | fails to build, it is an indication that something has gone wrong with the
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| 190 | previous Binutils, GCC, or Glibc installations.</para></note>
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| 191 |
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| 192 | </sect2>
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| 193 |
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[ee1a413] | 194 | <sect2 arch="ml_32,ml_all" role="installation">
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[8eb3fe4] | 195 | <title>Installation of Glibc 32-bit</title>
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| 196 |
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| 197 | <para>Clean the build directory for redoing glibc for 32-bit:</para>
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| 198 | <screen><userinput remap="pre">mkdir ../build32
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| 199 | cd ../build32</userinput></screen>
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| 200 |
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| 201 | <para>Rebuild glibc for 32-bit:</para>
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| 202 | <screen><userinput remap="configure">echo slibdir=/tools/lib32 > configparms
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| 203 | BUILD_CC="gcc -m32" \
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| 204 | CC="${LFS_TGT}-gcc -m32" \
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| 205 | CXX="${LFS_TGT}-g++ -m32" \
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| 206 | AR="${LFS_TGT}-ar" \
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| 207 | RANLIB="${LFS_TGT}-ranlib" \
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| 208 | ../configure --prefix=/tools \
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| 209 | --build=$(../scripts/config.guess) \
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| 210 | --host=${LFS_TGT32} \
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| 211 | --enable-kernel=&min-kernel; \
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| 212 | --enable-multi-arch \
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| 213 | --libdir=/tools/lib32 \
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| 214 | --libexecdir=/tools/lib32 \
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| 215 | --with-headers=/tools/include \
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[ee1a413] | 216 | --with-binutils=/tools/bin</userinput></screen>
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| 217 | <!-- \
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[8eb3fe4] | 218 | libc_cv_forced_unwind=yes \
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[ee1a413] | 219 | libc_cv_c_cleanup=yes</userinput></screen> -->
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[8eb3fe4] | 220 |
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| 221 | <para>Now compile the 32-bit version of glibc:</para>
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| 222 | <screen><userinput remap="make">make</userinput></screen>
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| 223 |
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| 224 | <para>Install 32-bit version of glibc:</para>
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| 225 | <screen><userinput remap="install">make install_root="${PWD}/DESTDIR" install
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| 226 | install -vdm755 /tools/lib32
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| 227 | cp -Rv DESTDIR/tools/lib32/* /tools/lib32
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| 228 | install -vm644 DESTDIR/tools/include/gnu/{lib-names,stubs}-32.h \
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| 229 | /tools/include/gnu/
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| 230 | ln -svf /tools/lib32/ld-linux.so.2 /tools/lib/
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| 231 | cd ..</userinput></screen>
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| 232 |
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| 233 | </sect2>
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| 234 |
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[ee1a413] | 235 | <sect2 arch="ml_x32,ml_all" role="installation">
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[8eb3fe4] | 236 | <title>Installation of Glibc x32-bit</title>
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| 237 |
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| 238 | <para>Create a build directory for redoing glibc for x32-bit:</para>
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| 239 | <screen><userinput remap="pre">mkdir build32x
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| 240 | cd build32x</userinput></screen>
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| 241 |
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| 242 | <para>Rebuild glibc for x32-bit:</para>
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| 243 | <screen><userinput remap="configure">echo slibdir=/tools/libx32 > configparms
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| 244 | BUILD_CC="gcc -mx32" \
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| 245 | CC="${LFS_TGT}-gcc -mx32" \
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| 246 | CXX="${LFS_TGT}-g++ -mx32" \
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| 247 | AR="${LFS_TGT}-ar" \
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| 248 | RANLIB="${LFS_TGT}-ranlib" \
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| 249 | ../configure --prefix=/tools \
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| 250 | --build=$(../scripts/config.guess) \
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| 251 | --host=${LFS_TGTX32} \
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| 252 | --enable-kernel=&min-kernel; \
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| 253 | --enable-multi-arch \
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| 254 | --libdir=/tools/libx32 \
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| 255 | --libexecdir=/tools/libx32 \
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| 256 | --with-headers=/tools/include \
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[ee1a413] | 257 | --with-binutils=/tools/bin</userinput></screen>
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| 258 | <!-- \
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[8eb3fe4] | 259 | libc_cv_forced_unwind=yes \
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[ee1a413] | 260 | libc_cv_c_cleanup=yes</userinput></screen> -->
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[8eb3fe4] | 261 |
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| 262 | <para>Now compile the x32-bit version of glibc:</para>
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| 263 | <screen><userinput remap="make">make</userinput></screen>
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| 264 |
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| 265 | <para>Install x32-bit version of glibc:</para>
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| 266 | <screen><userinput remap="install">make install_root="${PWD}/DESTDIR" install
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| 267 | install -vdm755 /tools/libx32
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| 268 | cp -Rv DESTDIR/tools/libx32/* /tools/libx32
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| 269 | install -vm644 DESTDIR/tools/include/gnu/lib-names-x32.h \
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| 270 | /tools/include/gnu/
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| 271 | [ -e DESTDIR/tools/include/gnu/stubs-x32.h ] \
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| 272 | && install -vm644 DESTDIR/tools/include/gnu/stubs-x32.h /tools/include/gnu/ \
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| 273 | || ln -v /tools/include/gnu/stubs-64.h /tools/include/gnu/stubs-x32.h
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| 274 | ln -svf /tools/libx32/ld-linux-x32.so.2 /tools/lib/</userinput></screen>
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| 275 | <!-- For whatever reason the stubs-x32.h doesn't get created. The 'ln' above is
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| 276 | just a "brute force" workaraound - by copying the stubs-64.h file. -->
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| 277 |
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| 278 | <caution>
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| 279 | <para>At this point, it is imperative to stop and ensure that the basic
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| 280 | functions (compiling and linking) of the new toolchain are working as
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| 281 | expected. To perform a sanity check, run the following commands:</para>
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| 282 |
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| 283 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 284 | $LFS_TGT-gcc -m32 dummy.c
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| 285 | readelf -l a.out | grep ': /tools'</userinput></screen>
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| 286 |
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| 287 | <para>If everything is working correctly, there should be no errors,
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| 288 | and the output of the last command will be of the form:</para>
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| 289 |
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| 290 | <screen><computeroutput>[Requesting program interpreter: /tools/lib/ld-linux.so.2]</computeroutput></screen>
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| 291 |
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| 292 | <para>Redo test for x32-ABI:</para>
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| 293 |
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| 294 | <screen><userinput>echo 'int main(){}' > dummy.c
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| 295 | $LFS_TGT-gcc -mx32 dummy.c
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| 296 | readelf -l a.out | grep ': /tools'</userinput></screen>
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| 297 |
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| 298 | <para>Output should be like:</para>
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| 299 |
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[aa196b1] | 300 | <screen><computeroutput>[Requesting program interpreter: /tools/libx32/ld-linux-x32.so.2]</computeroutput></screen>
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[8eb3fe4] | 301 |
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| 302 | <para>If the output is not shown as above or there was no output at all,
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| 303 | then something is wrong. Investigate and retrace the steps to find out
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| 304 | where the problem is and correct it. This issue must be resolved before
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| 305 | continuing on.</para>
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| 306 |
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| 307 | <para>Once all is well, clean up the test files:</para>
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| 308 |
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| 309 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
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| 310 |
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| 311 | </caution>
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| 312 | </sect2>
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| 313 |
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[1fa2099] | 314 | <sect2 role="content">
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| 315 | <title/>
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| 316 |
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| 317 | <para>Details on this package are located in
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| 318 | <xref linkend="contents-glibc" role="."/></para>
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| 319 |
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| 320 | </sect2>
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| 321 |
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| 322 | </sect1>
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