[1fa2099] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
|
---|
| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
---|
| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
---|
| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
|
---|
| 5 | %general-entities;
|
---|
| 6 | ]>
|
---|
| 7 |
|
---|
| 8 | <sect1 id="ch-tools-glibc" role="wrap">
|
---|
| 9 | <?dbhtml filename="glibc.html"?>
|
---|
| 10 |
|
---|
| 11 | <sect1info condition="script">
|
---|
| 12 | <productname>glibc</productname>
|
---|
| 13 | <productnumber>&glibc-version;</productnumber>
|
---|
| 14 | <address>&glibc-url;</address>
|
---|
| 15 | </sect1info>
|
---|
| 16 |
|
---|
| 17 | <title>Glibc-&glibc-version;</title>
|
---|
| 18 |
|
---|
| 19 | <indexterm zone="ch-tools-glibc">
|
---|
| 20 | <primary sortas="a-Glibc">Glibc</primary>
|
---|
| 21 | <secondary>tools</secondary>
|
---|
| 22 | </indexterm>
|
---|
| 23 |
|
---|
| 24 | <sect2 role="package">
|
---|
| 25 | <title/>
|
---|
| 26 |
|
---|
| 27 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
---|
| 28 | href="../chapter06/glibc.xml"
|
---|
| 29 | xpointer="xpointer(/sect1/sect2[1]/para[1])"/>
|
---|
| 30 |
|
---|
| 31 | <segmentedlist>
|
---|
| 32 | <segtitle>&buildtime;</segtitle>
|
---|
| 33 | <segtitle>&diskspace;</segtitle>
|
---|
| 34 |
|
---|
| 35 | <seglistitem>
|
---|
| 36 | <seg>&glibc-ch5-sbu;</seg>
|
---|
| 37 | <seg>&glibc-ch5-du;</seg>
|
---|
| 38 | </seglistitem>
|
---|
| 39 | </segmentedlist>
|
---|
| 40 |
|
---|
| 41 | </sect2>
|
---|
| 42 |
|
---|
| 43 | <sect2 role="installation">
|
---|
| 44 | <title>Installation of Glibc</title>
|
---|
| 45 |
|
---|
| 46 | <para>The Glibc documentation recommends building Glibc
|
---|
| 47 | in a dedicated build directory:</para>
|
---|
| 48 |
|
---|
| 49 | <screen><userinput remap="pre">mkdir -v build
|
---|
| 50 | cd build</userinput></screen>
|
---|
| 51 |
|
---|
| 52 | <para>Next, prepare Glibc for compilation:</para>
|
---|
| 53 |
|
---|
| 54 | <screen><userinput remap="configure">../configure \
|
---|
| 55 | --prefix=/tools \
|
---|
| 56 | --host=$LFS_TGT \
|
---|
| 57 | --build=$(../scripts/config.guess) \
|
---|
| 58 | --enable-kernel=&min-kernel; \
|
---|
| 59 | --with-headers=/tools/include</userinput></screen>
|
---|
| 60 | <!--
|
---|
| 61 | libc_cv_forced_unwind=yes \
|
---|
| 62 | libc_cv_c_cleanup=yes</userinput></screen> -->
|
---|
| 63 |
|
---|
| 64 | <variablelist>
|
---|
| 65 | <title>The meaning of the configure options:</title>
|
---|
| 66 |
|
---|
| 67 | <varlistentry>
|
---|
| 68 | <term><parameter>--host=$LFS_TGT, --build=$(../scripts/config.guess)</parameter></term>
|
---|
| 69 | <listitem>
|
---|
| 70 | <para>The combined effect of these switches is that Glibc's build system
|
---|
| 71 | configures itself to cross-compile, using the cross-linker and
|
---|
| 72 | cross-compiler in <filename class="directory">/tools</filename>.</para>
|
---|
| 73 | </listitem>
|
---|
| 74 | </varlistentry>
|
---|
| 75 |
|
---|
| 76 | <varlistentry>
|
---|
| 77 | <term><parameter>--enable-kernel=&min-kernel;</parameter></term>
|
---|
| 78 | <listitem>
|
---|
| 79 | <para>This tells Glibc to compile the library with support
|
---|
| 80 | for &min-kernel; and later Linux kernels. Workarounds for older
|
---|
| 81 | kernels are not enabled.</para>
|
---|
| 82 | </listitem>
|
---|
| 83 | </varlistentry>
|
---|
| 84 |
|
---|
| 85 | <varlistentry>
|
---|
| 86 | <term><parameter>--with-headers=/tools/include</parameter></term>
|
---|
| 87 | <listitem>
|
---|
| 88 | <para>This tells Glibc to compile itself against the headers recently
|
---|
| 89 | installed to the tools directory, so that it knows exactly what
|
---|
| 90 | features the kernel has and can optimize itself accordingly.</para>
|
---|
| 91 | </listitem>
|
---|
| 92 | </varlistentry>
|
---|
| 93 | <!--
|
---|
| 94 | <varlistentry>
|
---|
| 95 | <term><parameter>libc_cv_forced_unwind=yes</parameter></term>
|
---|
| 96 | <listitem>
|
---|
| 97 | <para>The linker installed during
|
---|
| 98 | <xref linkend="ch-tools-binutils-pass1"/> was cross-compiled and as
|
---|
| 99 | such cannot be used until Glibc has been installed. This means that
|
---|
| 100 | the configure test for force-unwind support will fail, as it relies on
|
---|
| 101 | a working linker. The libc_cv_forced_unwind=yes variable is passed in
|
---|
| 102 | order to inform <command>configure</command> that force-unwind
|
---|
| 103 | support is available without it having to run the test.</para>
|
---|
| 104 | </listitem>
|
---|
| 105 | </varlistentry>
|
---|
| 106 | <varlistentry>
|
---|
| 107 | <term><parameter>libc_cv_c_cleanup=yes</parameter></term>
|
---|
| 108 | <listitem>
|
---|
| 109 | <para>Similarly, we pass libc_cv_c_cleanup=yes through to the
|
---|
| 110 | <command>configure</command> script so that the test is skipped and C
|
---|
| 111 | cleanup handling support is configured.</para>
|
---|
| 112 | </listitem>
|
---|
| 113 | </varlistentry>
|
---|
| 114 | -->
|
---|
| 115 | <!-- <varlistentry>
|
---|
| 116 | <term><parameter>libc_cv_ctors_header=yes</parameter></term>
|
---|
| 117 | <listitem>
|
---|
| 118 | <para>Similarly, we pass libc_cv_ctors_header=yes through to the
|
---|
| 119 | <command>configure</command> script so that the test is skipped and
|
---|
| 120 | gcc constructor support is configured.</para>
|
---|
| 121 | </listitem>
|
---|
| 122 | </varlistentry>-->
|
---|
| 123 |
|
---|
| 124 | </variablelist>
|
---|
| 125 |
|
---|
| 126 | <para>During this stage the following warning might appear:</para>
|
---|
| 127 |
|
---|
| 128 | <blockquote>
|
---|
| 129 | <screen><computeroutput>configure: WARNING:
|
---|
| 130 | *** These auxiliary programs are missing or
|
---|
| 131 | *** incompatible versions: msgfmt
|
---|
| 132 | *** some features will be disabled.
|
---|
| 133 | *** Check the INSTALL file for required versions.</computeroutput></screen>
|
---|
| 134 | </blockquote>
|
---|
| 135 |
|
---|
| 136 | <para>The missing or incompatible <command>msgfmt</command> program is
|
---|
| 137 | generally harmless. This <command>msgfmt</command> program is part of the
|
---|
| 138 | Gettext package which the host distribution should provide.</para>
|
---|
| 139 |
|
---|
| 140 | <note><para>There have been reports that this package may fail when
|
---|
| 141 | building as a "parallel make". If this occurs, rerun the make command
|
---|
| 142 | with a "-j1" option.</para></note>
|
---|
| 143 |
|
---|
| 144 | <para>Compile the package:</para>
|
---|
| 145 |
|
---|
| 146 | <screen><userinput remap="make">make</userinput></screen>
|
---|
| 147 |
|
---|
| 148 | <para>Install the package:</para>
|
---|
| 149 |
|
---|
| 150 | <screen><userinput remap="install">make install</userinput></screen>
|
---|
| 151 |
|
---|
| 152 | <caution>
|
---|
| 153 | <para>At this point, it is imperative to stop and ensure that the basic
|
---|
| 154 | functions (compiling and linking) of the new toolchain are working as
|
---|
| 155 | expected. To perform a sanity check, run the following commands:</para>
|
---|
| 156 |
|
---|
| 157 | <screen><userinput>echo 'int main(){}' > dummy.c
|
---|
| 158 | $LFS_TGT-gcc dummy.c
|
---|
| 159 | readelf -l a.out | grep ': /tools'</userinput></screen>
|
---|
| 160 |
|
---|
| 161 | <para>If everything is working correctly, there should be no errors,
|
---|
| 162 | and the output of the last command will be of the form:</para>
|
---|
| 163 |
|
---|
| 164 | <screen><computeroutput>[Requesting program interpreter: /tools/lib64/ld-linux-x86-64.so.2]</computeroutput></screen>
|
---|
| 165 |
|
---|
| 166 | <para>Note that for 32-bit machines, the interpreter name will be
|
---|
| 167 | <filename>/tools/lib/ld-linux.so.2</filename>.</para>
|
---|
| 168 |
|
---|
| 169 | <para>If the output is not shown as above or there was no output at all,
|
---|
| 170 | then something is wrong. Investigate and retrace the steps to find out
|
---|
| 171 | where the problem is and correct it. This issue must be resolved before
|
---|
| 172 | continuing on.</para>
|
---|
| 173 |
|
---|
| 174 | <para>Once all is well, clean up the test files:</para>
|
---|
| 175 |
|
---|
| 176 | <screen><userinput>rm -v dummy.c a.out</userinput></screen>
|
---|
| 177 |
|
---|
| 178 | </caution>
|
---|
| 179 |
|
---|
| 180 | <note><para>Building Binutils in the section after next will serve as an
|
---|
| 181 | additional check that the toolchain has been built properly. If Binutils
|
---|
| 182 | fails to build, it is an indication that something has gone wrong with the
|
---|
| 183 | previous Binutils, GCC, or Glibc installations.</para></note>
|
---|
| 184 |
|
---|
| 185 | </sect2>
|
---|
| 186 |
|
---|
| 187 | <sect2 role="content">
|
---|
| 188 | <title/>
|
---|
| 189 |
|
---|
| 190 | <para>Details on this package are located in
|
---|
| 191 | <xref linkend="contents-glibc" role="."/></para>
|
---|
| 192 |
|
---|
| 193 | </sect2>
|
---|
| 194 |
|
---|
| 195 | </sect1>
|
---|