lfs-book/chapter05/kernel-headers.xml

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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../general.ent">
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<sect1 id="ch-tools-kernel-headers" role="wrap">
<title>Linux-&linux-version; headers</title>
<?dbhtml filename="kernel-headers.html"?>

<indexterm zone="ch-tools-kernel-headers">
<primary sortas="a-Linux">Linux</primary>
<secondary>tools, headers</secondary></indexterm>

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

<segmentedlist>
<segtitle>&buildtime;</segtitle>
<segtitle>&diskspace;</segtitle>
<seglistitem><seg>0.1 SBU</seg><seg>186 MB</seg></seglistitem>
</segmentedlist>

</sect2>

<sect2 role="installation">
<title>Installation of the kernel headers</title>

<para>As some packages need to refer to the kernel header files, we're going
to unpack the kernel archive now, set it up, and copy the required files to a
place where <command>gcc</command> can later find them.</para>

<para>Prepare for the header installation with:</para>

<screen><userinput>make mrproper</userinput></screen>

<para>This ensures that the kernel tree is absolutely clean. The kernel team
recommends that this command be issued prior to <emphasis>each</emphasis>
kernel compilation. You shouldn't rely on the source tree being clean after
un-tarring.</para>

<para>Create the <filename>include/linux/version.h</filename> file:</para>

<screen><userinput>make include/linux/version.h</userinput></screen>

<para>Create the platform-specific <filename class="symlink">include/asm</filename>
symlink:</para>

<screen><userinput>make include/asm</userinput></screen>

<para>Install the platform-specific header files:</para>

<screen><userinput>mkdir /tools/glibc-kernheaders
cp -HR include/asm /tools/glibc-kernheaders
cp -R include/asm-generic /tools/glibc-kernheaders</userinput></screen>

<para>Finally, install the cross-platform kernel header files:</para>

<screen><userinput>cp -R include/linux /tools/glibc-kernheaders</userinput></screen>

</sect2>

</sect1>