source: BOOK/cross-tools/x86/glibc-headers.xml@ eb35845

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;
]>

<sect1 id="ch-cross-tools-glibc-headers" role="wrap">
  <?dbhtml filename="glibc-headers.html"?>

  <title>Glibc-&glibc-version; Headers</title>

  <indexterm zone="ch-cross-tools-glibc-headers">
    <primary sortas="a-Glibc">Glibc</primary>
    <secondary>cross tools, headers</secondary>
  </indexterm>

  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
  href="../../final-system/common/glibc.xml"
  xpointer="xpointer(//*[@role='package'])"/>

  <sect2 role="installation">
    <title>Installation of Glibc Headers</title>

    <para os="s1">The following sed removes a dependency of gcc 3.4.x from
    the glibc we are using in cross-lfs. The reason we are changing it is
    because this only installs the headers, no compiling takes place. In the
    next glibc chapter, we use the gcc that's build right after this chapter.</para>

<screen os="s2"><userinput>cp configure{,.orig}
sed -e 's/3.4/3.[0-9]/g' configure.orig > configure</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../../final-system/common/glibc.xml"
    xpointer="xpointer(//*[@os='e'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../../final-system/common/glibc.xml"
    xpointer="xpointer(//*[@os='f'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../../final-system/common/glibc.xml"
    xpointer="xpointer(//*[@os='g'])"/>

<screen><userinput>CC=gcc ../glibc-&glibc-version;/configure --prefix=/tools \
    --host=${LFS_TARGET} --build=${LFS_HOST} \
    --disable-sanity-checks --enable-kernel=2.6.0 \
    --with-headers=/tools/include \
    --with-binutils=/cross-tools/${LFS_TARGET}/bin</userinput></screen>

   <warning os="e1">
      <para><emphasis>Any</emphasis> error message you see about nptl at this point\
       can safely be ignored.</para>
   </warning>

    <variablelist os="ca">
      <title>The meaning of the configure options:</title>

      <varlistentry>
        <term><parameter>CC=gcc</parameter></term>
        <listitem>
          <para>This do ...</para>
        </listitem>
      </varlistentry>

      <varlistentry os="ca1">
        <term><parameter>--prefix=/tools</parameter></term>
        <listitem>
          <para>This tells the configure script to prepare to install the
          package in the <filename class="directory">/tools</filename>
          directory.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="ca2">
        <term><parameter>--host=${LFS_TARGET}</parameter></term>
        <listitem>
          <para>This do ...</para>
        </listitem>
      </varlistentry>

      <varlistentry os="ca3">
        <term><parameter>--build=${LFS_HOST}</parameter></term>
        <listitem>
          <para>This do ...</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>--disable-sanity-checks</parameter></term>
        <listitem>
          <para>This switch do ... .</para>
        </listitem>
      </varlistentry>

      <varlistentry os="ca4">
        <term><parameter>--enable-kernel=2.6.0</parameter></term>
        <listitem>
          <para>This tells Glibc to compile the library with support
          for 2.6.x Linux kernels.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="ca5">
        <term><parameter>--with-headers=/tools/include</parameter></term>
        <listitem>
          <para>This tells Glibc to compile itself against the headers
          recently installed to the <filename class="directory">/tools</filename>
          directory, so that it knows exactly what features the kernel has
          and can optimize itself accordingly.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><parameter>--with-binutils=/cross-tools/${LFS_TARGET}/bin</parameter></term>
        <listitem>
          <para>This switch do ... .</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <para os="cb">Now, install the headers:</para>

<screen os="cd"><userinput>make install-headers</userinput></screen>

    <para os="ce">Some files aren't installed by the above command, then
    we will copy the header files we need:</para>

    <para os="cf">First we will copy a common file over to <filename
    class="directory">/tools/include</filename>:</para>

<screen os="cg"><userinput>install -d /tools/include/bits
cp bits/stdio_lim.h /tools/include/bits</userinput></screen>

    <para os="ch">Now we will create a blank stub file:</para>

<screen os="ci"><userinput>touch /tools/include/gnu/stubs.h</userinput></screen>

    <para os="cj">For NPTL we use the following command:</para>

<screen os="ck"><userinput>cp ../glibc-&glibc-version;/nptl/sysdeps/pthread/pthread.h /tools/include/</userinput></screen>

    <para os="cl">Now we copy the architecture specific header over:</para>

<screen><userinput>cp ../glibc-&glibc-version;/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h /tools/include/bits/</userinput></screen>

  </sect2>

  <sect2 role="content">
    <title/>

    <para>Details on this package are located in <xref
    linkend="contents-glibc" role="."/></para>

  </sect2>

</sect1>