| 1 | <sect1 id="ch05-kernel-headers">
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| 2 | <title>Installing Linux-&kernel-version; headers</title>
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| 3 | <?dbhtml filename="kernel-headers.html" dir="chapter05"?>
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| 4 |
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| 5 | <screen>Estimated build time: &kernel-time-headers;
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| 6 | Estimated required disk space: &kernel-compsize-headers;</screen>
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| 7 |
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| 8 | &aa-kernel-shortdesc;
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| 9 | &aa-kernel-dep;
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| 10 |
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| 11 | <sect2><title> </title><para> </para></sect2>
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| 12 |
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| 13 | <sect2>
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| 14 | <title>Installation of the kernel headers</title>
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| 15 |
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| 16 | <para>As some packages need to refer to the kernel header files, we're going
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| 17 | to unpack the kernel archive now, set it up, and copy the required files to a
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| 18 | place where <userinput>gcc</userinput> can later find them.</para>
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| 19 |
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| 20 | <para>Prepare for the header installation with:</para>
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| 21 |
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| 22 | <screen><userinput>make mrproper</userinput></screen>
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| 23 |
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| 24 | <para>This ensures that the kernel tree is absolutely clean. The kernel team
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| 25 | recommends that this command be issued prior to <emphasis>each</emphasis> kernel
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| 26 | compilation. You shouldn't rely on the source tree being clean after
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| 27 | untarring.</para>
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| 28 |
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| 29 | <para>Create the <filename>include/linux/version.h</filename> file:</para>
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| 30 |
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| 31 | <screen><userinput>make include/linux/version.h</userinput></screen>
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| 32 |
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| 33 | <para>Create the platform-specific <filename>include/asm</filename>
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| 34 | symlink:</para>
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| 35 |
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| 36 | <screen><userinput>make symlinks</userinput></screen>
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| 37 |
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| 38 | <para>Install the platform-specific header files:</para>
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| 39 |
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| 40 | <screen><userinput>mkdir /tools/include/asm
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| 41 | cp include/asm/* /tools/include/asm
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| 42 | cp -R include/asm-generic /tools/include</userinput></screen>
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| 43 |
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| 44 | <para>Install the cross-platform kernel header files:</para>
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| 45 |
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| 46 | <screen><userinput>cp -R include/linux /tools/include</userinput></screen>
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| 47 |
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| 48 | <para>There are a few kernel header files which make use of the
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| 49 | <filename>autoconf.h</filename> header file. Since we do not yet configure the
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| 50 | kernel, we need to create this file ourselves in order to avoid compilation
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| 51 | failures. Create an empty <filename>autoconf.h</filename> file:</para>
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| 52 |
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| 53 | <screen><userinput>touch /tools/include/linux/autoconf.h</userinput></screen>
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| 54 |
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| 55 | </sect2>
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| 56 |
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| 57 | </sect1>
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| 58 |
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