| 1 | <sect1 id="ch08-kernel">
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| 2 | <title>Installing Linux-&kernel-version;</title>
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| 3 | <?dbhtml filename="kernel.html" dir="chapter08"?>
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| 4 |
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| 5 | <screen>Estimated build time: &kernel-time;
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| 6 | Estimated required disk space: &kernel-compsize;</screen>
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| 7 |
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| 8 | <para>Building the kernel involves a few steps: configuring it and compiling
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| 9 | it. There are a few ways to configure the kernel. If you don't like the
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| 10 | way this book does it, read the <filename>README</filename> that comes
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| 11 | with the kernel source tree, and find out what the other options are.</para>
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| 12 |
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| 13 | <para>Something you could do, is take the <filename>.config</filename>
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| 14 | file from your host distribution's kernel source tree and copy it to
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| 15 | <filename class="directory">$LFS/usr/src/linux-&kernel-version;</filename>.
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| 16 | This way you don't have to configure the entire kernel from scratch and
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| 17 | can use your current values. If you choose to do this, first run the
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| 18 | <userinput>make mrproper</userinput> command below, then copy the
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| 19 | <filename>.config</filename> file over, then run
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| 20 | <userinput>make menuconfig</userinput> followed by the rest of the commands
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| 21 | (<userinput>make oldconfig</userinput> may be better in some situations.
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| 22 | See the <filename>README</filename> file for more details when to use
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| 23 | <userinput>make oldconfig</userinput>).</para>
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| 24 |
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| 25 | <para>If you intend to use kernel modules, you will need an
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| 26 | <filename>/etc/modules.conf</filename> file. Information pertaining
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| 27 | to modules and to kernel configuration in general may be found in the
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| 28 | kernel documentation, which is stored stored in
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| 29 | <filename>/usr/src/linux-&kernel-version;/Documentation</filename>. The
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| 30 | modules.conf man page and the kernel HOWTO at
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| 31 | <ulink url="&tldp-root;HOWTO/Kernel-HOWTO.html"/> may also be of
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| 32 | interest to you.</para>
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| 33 |
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| 34 | <para>The following commands are run to build the kernel:</para>
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| 35 |
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| 36 | <para><screen><userinput>make mrproper &&
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| 37 | make menuconfig &&
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| 38 | make dep &&
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| 39 | make bzImage &&
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| 40 | make modules &&
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| 41 | make modules_install &&
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| 42 | cp arch/i386/boot/bzImage /boot/lfskernel &&
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| 43 | cp System.map /boot</userinput></screen></para>
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| 44 |
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| 45 | <para>Note: the arch/i386/boot/bzImage path may vary on
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| 46 | different platforms.</para>
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| 47 |
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| 48 | &aa-kernel-dep;
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| 49 |
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| 50 | </sect1>
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