[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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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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[1f7ca93] | 27 | <xi:include xmlns:xi="http://www.w3.org/2003/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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[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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[e4a5635] | 36 | <seg>&glibc-ch5-sbu;</seg>
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| 37 | <seg>&glibc-ch5-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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[73aedd1d] | 45 |
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[b2e9376] | 46 | <para>Fix a potential issue if <filename>/etc/ld.so.preload</filename> is
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| 47 | used on the host system.</para>
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| 48 |
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| 49 | <screen><userinput remap="pre">sed -i 's@/etc/ld.so.preload@/tools/etc/ld.so.preload@' elf/rtld.c</userinput></screen>
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| 50 |
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[1f7ca93] | 51 | <para>The Glibc documentation recommends building Glibc outside of the source
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| 52 | directory in a dedicated build directory:</para>
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[3d36131c] | 53 |
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[0445a3d] | 54 | <screen><userinput remap="pre">mkdir -v ../glibc-build
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[73aedd1d] | 55 | cd ../glibc-build</userinput></screen>
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| 56 |
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[2a7ac34] | 57 | <para>Because Glibc no longer supports i386, its developers say to use the
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| 58 | compiler flag <parameter>-march=i486</parameter> when building it for x86
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| 59 | machines. There are several ways to accomplish that, but testing shows that
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| 60 | the flag is best placed inside the build variable <quote>CFLAGS</quote>.
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| 61 | Instead of overriding completely what Glibc's internal build system uses
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| 62 | for CFLAGS, append the new flag to the existing contents of CFLAGS by
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[1c6f1c1] | 63 | making use of the special file <filename>configparms</filename>. The
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| 64 | -mtune=native flag is also necessary to reset a reasonable value for -mtune
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| 65 | that is changed when setting -march.</para>
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[2a7ac34] | 66 |
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[1c6f1c1] | 67 | <screen><userinput remap="configure">echo "CFLAGS += -march=i486 -mtune=native" > configparms</userinput></screen>
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[2a7ac34] | 68 |
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[1f7ca93] | 69 | <para>Next, prepare Glibc for compilation:</para>
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[73aedd1d] | 70 |
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[0445a3d] | 71 | <screen><userinput remap="configure">../glibc-&glibc-version;/configure --prefix=/tools \
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[94aa6621] | 72 | --disable-profile --enable-add-ons \
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[084db8d] | 73 | --enable-kernel=2.6.0 --with-binutils=/tools/bin \
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[8e97f32] | 74 | --without-gd --with-headers=/tools/include \
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[3d31fc4] | 75 | --without-selinux</userinput></screen>
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[73aedd1d] | 76 |
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[1f7ca93] | 77 | <variablelist>
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| 78 | <title>The meaning of the configure options:</title>
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| 79 |
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| 80 | <varlistentry>
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| 81 | <term><parameter>--disable-profile</parameter></term>
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| 82 | <listitem>
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| 83 | <para>This builds the libraries without profiling information. Omit
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| 84 | this option if profiling on the temporary tools is necessary.</para>
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| 85 | </listitem>
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| 86 | </varlistentry>
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| 87 |
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| 88 | <varlistentry>
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| 89 | <term><parameter>--enable-add-ons</parameter></term>
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| 90 | <listitem>
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| 91 | <para>This tells Glibc to use the NPTL add-on as its threading
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| 92 | library.</para>
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| 93 | </listitem>
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| 94 | </varlistentry>
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| 95 |
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| 96 | <varlistentry>
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| 97 | <term><parameter>--enable-kernel=2.6.0</parameter></term>
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| 98 | <listitem>
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| 99 | <para>This tells Glibc to compile the library with support
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| 100 | for 2.6.x Linux kernels.</para>
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| 101 | </listitem>
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| 102 | </varlistentry>
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| 103 |
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| 104 | <varlistentry>
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| 105 | <term><parameter>--with-binutils=/tools/bin</parameter></term>
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| 106 | <listitem>
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| 107 | <para>While not required, this switch ensures that there are
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| 108 | no errors pertaining to which Binutils programs get used during the
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| 109 | Glibc build.</para>
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| 110 | </listitem>
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| 111 | </varlistentry>
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| 112 |
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| 113 | <varlistentry>
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| 114 | <term><parameter>--without-gd</parameter></term>
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| 115 | <listitem>
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| 116 | <para>This prevents the build of the <command>memusagestat</command>
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| 117 | program, which insists on linking against the host's libraries
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| 118 | (libgd, libpng, libz, etc.).</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>--with-headers=/tools/include</parameter></term>
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| 124 | <listitem>
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| 125 | <para>This tells Glibc to compile itself against the headers recently
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| 126 | installed to the tools directory, so that it knows exactly what
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| 127 | features the kernel has and can optimize itself accordingly.</para>
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| 128 | </listitem>
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| 129 | </varlistentry>
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| 130 |
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| 131 | <varlistentry>
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| 132 | <term><parameter>--without-selinux</parameter></term>
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| 133 | <listitem>
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| 134 | <para>When building from hosts that include SELinux functionality
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| 135 | (e.g., Fedora Core 3), Glibc will build with support for SELinux.
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| 136 | As the LFS tools environment does not contain support for SELinux, a
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| 137 | Glibc compiled with such support will fail to operate correctly.</para>
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| 138 | </listitem>
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| 139 | </varlistentry>
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| 140 |
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| 141 | </variablelist>
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| 142 |
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| 143 | <para>During this stage the following warning might appear:</para>
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| 144 |
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| 145 | <blockquote>
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| 146 | <screen><computeroutput>configure: WARNING:
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| 147 | *** These auxiliary programs are missing or
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[81fd230] | 148 | *** incompatible versions: msgfmt
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| 149 | *** some features will be disabled.
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[1f7ca93] | 150 | *** Check the INSTALL file for required versions.</computeroutput></screen>
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| 151 | </blockquote>
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[81fd230] | 152 |
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[1f7ca93] | 153 | <para>The missing or incompatible <command>msgfmt</command> program is
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| 154 | generally harmless, but it can sometimes cause issues when running the
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| 155 | test suite. This <command>msgfmt</command> program is part of the
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| 156 | Gettext package which the host distribution should provide. If
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| 157 | <command>msgfmt</command> is present but deemed incompatible, upgrade
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| 158 | the host system's Gettext package or continue without it and see if
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| 159 | the test suite runs without problems regardless.</para>
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[81fd230] | 160 |
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[1f7ca93] | 161 | <para>Compile the package:</para>
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[73aedd1d] | 162 |
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[0445a3d] | 163 | <screen><userinput remap="make">make</userinput></screen>
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[73aedd1d] | 164 |
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[0abc697] | 165 | <para>This package does come with a test suite, however, it cannot be
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| 166 | run at this time because we do not have a C++ compiler yet.</para>
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[81fd230] | 167 |
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[1f7ca93] | 168 | <para>The install stage of Glibc will issue a harmless warning at the
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| 169 | end about the absence of <filename>/tools/etc/ld.so.conf</filename>.
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| 170 | Prevent this warning with:</para>
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[d878ce3] | 171 |
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[0445a3d] | 172 | <screen><userinput remap="install">mkdir -v /tools/etc
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[1caa48e] | 173 | touch /tools/etc/ld.so.conf</userinput></screen>
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| 174 |
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[1f7ca93] | 175 | <para>Install the package:</para>
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[73aedd1d] | 176 |
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[0445a3d] | 177 | <screen><userinput remap="install">make install</userinput></screen>
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[73aedd1d] | 178 |
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[1f7ca93] | 179 | <para>Different countries and cultures have varying conventions for
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| 180 | how to communicate. These conventions range from the format for
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| 181 | representing dates and times to more complex issues, such as the
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| 182 | language spoken. The <quote>internationalization</quote> of GNU
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| 183 | programs works by locale.</para>
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[81fd230] | 184 |
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[1f7ca93] | 185 | <note>
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| 186 | <para>If the test suites are not being run in this chapter (as per
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| 187 | the recommendation), there is no need to install the locales now.
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| 188 | The appropriate locales will be installed in the next chapter.
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| 189 | To install the Glibc locales anyway, use instructions from
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| 190 | <xref linkend="ch-system-glibc" role="."/></para>
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| 191 | </note>
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[73aedd1d] | 192 |
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[1f7ca93] | 193 | </sect2>
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[bc82645e] | 194 |
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[1f7ca93] | 195 | <sect2 role="content">
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| 196 | <title/>
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[81fd230] | 197 |
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[1f7ca93] | 198 | <para>Details on this package are located in
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| 199 | <xref linkend="contents-glibc" role="."/></para>
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| 200 |
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| 201 | </sect2>
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[81fd230] | 202 |
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[1f7ca93] | 203 | </sect1>
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