| 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-cross-tools-glibc-headers" role="wrap">
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| 9 | <?dbhtml filename="glibc-headers.html"?>
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| 10 |
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| 11 | <title>Glibc-&glibc-version; Headers</title>
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| 12 |
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| 13 | <indexterm zone="ch-cross-tools-glibc-headers">
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| 14 | <primary sortas="a-Glibc">Glibc</primary>
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| 15 | <secondary>cross tools, headers</secondary>
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| 16 | </indexterm>
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| 17 |
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| 18 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 19 | href="../../final-system/common/glibc.xml"
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| 20 | xpointer="xpointer(//*[@role='package'])"/>
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| 21 |
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| 22 | <sect2 role="installation">
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| 23 | <title>Installation of Glibc Headers</title>
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| 24 |
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| 25 | <para os="s1">The following sed removes a dependency of gcc 3.4.x from
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| 26 | the glibc we are using in cross-lfs. The reason we are changing it is
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| 27 | because this only installs the headers, no compiling takes place. In the
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| 28 | next Glibc installation, we use the GCC that's built right after this section:</para>
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| 29 |
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| 30 | <screen os="s2"><userinput>cp -v configure{,.orig}
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| 31 | sed -e 's/3.4/3.[0-9]/g' configure.orig > configure</userinput></screen>
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| 32 |
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| 33 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 34 | href="../../final-system/common/glibc.xml"
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| 35 | xpointer="xpointer(//*[@os='e'])"/>
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| 36 |
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| 37 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 38 | href="../../final-system/common/glibc.xml"
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| 39 | xpointer="xpointer(//*[@os='f'])"/>
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| 40 |
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| 41 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 42 | href="../common/glibc.xml"
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| 43 | xpointer="xpointer(//*[@os='dd'])"/>
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| 44 |
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| 45 | <screen os="de"><userinput>echo "libc_cv_forced_unwind=yes" > config.cache
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| 46 | echo "libc_cv_c_cleanup=yes" >> config.cache
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| 47 | echo "libc_cv_mlong_double_128=yes" >> config.cache
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| 48 | echo "libc_cv_alpha_tls=yes" >> config.cache</userinput></screen>
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| 49 |
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| 50 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
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| 51 | href="../../final-system/common/glibc.xml"
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| 52 | xpointer="xpointer(//*[@os='g'])"/>
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| 53 |
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| 54 | <screen os="s3"><userinput>CC=gcc ../glibc-&glibc-version;/configure --prefix=/tools \
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| 55 | --host=${CLFS_TARGET} --build=${CLFS_HOST} \
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| 56 | --disable-sanity-checks --enable-kernel=2.6.0 \
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| 57 | --with-headers=/tools/include --cache-file=config.cache \
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| 58 | --with-binutils=/cross-tools/${CLFS_TARGET}/bin</userinput></screen>
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| 59 |
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| 60 | <note os="e1">
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| 61 | <para><emphasis>Any</emphasis> error message you see about nptl at this point
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| 62 | can safely be ignored.</para>
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| 63 | </note>
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| 64 |
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| 65 | <variablelist os="ca">
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| 66 | <title>The meaning of the configure options:</title>
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| 67 |
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| 68 | <varlistentry os="ca1">
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| 69 | <term><parameter>CC=gcc</parameter></term>
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| 70 | <listitem>
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| 71 | <para>Tells Glibc to use the host's GCC compiler.</para>
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| 72 | </listitem>
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| 73 | </varlistentry>
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| 74 |
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| 75 | <varlistentry os="ca2">
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| 76 | <term><parameter>--prefix=/tools</parameter></term>
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| 77 | <listitem>
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| 78 | <para>This tells the configure script to prepare to install the
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| 79 | package in the <filename class="directory">/tools</filename>
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| 80 | directory.</para>
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| 81 | </listitem>
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| 82 | </varlistentry>
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| 83 |
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| 84 | <varlistentry os="ca3">
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| 85 | <term><parameter>--build=${CLFS_HOST}</parameter></term>
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| 86 | <listitem>
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| 87 | <para>When used with --host, this creates a cross-architecture
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| 88 | executable that creates files for ${CLFS_TARGET} but runs on ${CLFS_HOST}.</para>
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| 89 | </listitem>
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| 90 | </varlistentry>
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| 91 |
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| 92 | <varlistentry os="ca4">
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| 93 | <term><parameter>--host=${CLFS_TARGET}</parameter></term>
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| 94 | <listitem>
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| 95 | <para>When used with --build, this creates a cross-architecture
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| 96 | executable that creates files for ${CLFS_TARGET} but runs on ${CLFS_HOST}.</para>
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| 97 | </listitem>
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| 98 | </varlistentry>
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| 99 |
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| 100 | <varlistentry os="ca5">
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| 101 | <term><parameter>--disable-sanity-checks</parameter></term>
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| 102 | <listitem>
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| 103 | <para>This switch disables any checks that are in place.</para>
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| 104 | </listitem>
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| 105 | </varlistentry>
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| 106 |
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| 107 | <varlistentry os="ca6">
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| 108 | <term><parameter>--enable-kernel=2.6.0</parameter></term>
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| 109 | <listitem>
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| 110 | <para>This tells Glibc to compile the library with support
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| 111 | for 2.6.x Linux kernels.</para>
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| 112 | </listitem>
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| 113 | </varlistentry>
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| 114 |
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| 115 | <varlistentry os="ca7">
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| 116 | <term><parameter>--with-headers=/tools/include</parameter></term>
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| 117 | <listitem>
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| 118 | <para>This tells Glibc to compile itself against the headers
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| 119 | recently installed to the <filename class="directory">/tools</filename>
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| 120 | directory, so that it knows exactly what features the kernel has
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| 121 | and can optimize itself accordingly.</para>
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| 122 | </listitem>
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| 123 | </varlistentry>
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| 124 |
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| 125 | <varlistentry os="ca8">
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| 126 | <term><parameter>--with-binutils=/cross-tools/${CLFS_TARGET}/bin</parameter></term>
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| 127 | <listitem>
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| 128 | <para>This tells Glibc to use the Binutils for our specific target architecture.</para>
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| 129 | </listitem>
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| 130 | </varlistentry>
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| 131 |
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| 132 | </variablelist>
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| 133 |
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| 134 | <para os="cb">Now, install the headers:</para>
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| 135 |
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| 136 | <screen os="cd"><userinput>make install-headers</userinput></screen>
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| 137 |
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| 138 | <para os="ce">Some files aren't installed by the above command, so
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| 139 | we will copy the additional header files we need.</para>
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| 140 |
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| 141 | <para os="cf">First we will copy a common file over to <filename
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| 142 | class="directory">/tools/include</filename>:</para>
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| 143 |
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| 144 | <screen os="cg"><userinput>install -dv /tools/include/bits
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| 145 | cp -v bits/stdio_lim.h /tools/include/bits</userinput></screen>
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| 146 |
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| 147 | <para os="ch">Now we will create a blank stub file:</para>
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| 148 |
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| 149 | <screen os="ci"><userinput>touch /tools/include/gnu/stubs.h</userinput></screen>
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| 150 |
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| 151 | <para os="cj">Another header is needed for NPTL:</para>
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| 152 |
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| 153 | <screen><userinput>cp -v ../glibc-&glibc-version;/nptl/sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h \
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| 154 | /tools/include/bits/</userinput></screen>
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| 155 |
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| 156 | </sect2>
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| 157 |
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| 158 | <sect2 role="content">
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| 159 | <title/>
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| 160 |
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| 161 | <para>Details on this package are located in <xref
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| 162 | linkend="contents-glibc" role="."/></para>
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| 163 |
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| 164 | </sect2>
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| 165 |
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| 166 | </sect1>
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