| 1 | <sect1 id="ch08-kernel">
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| 2 | <title>Installing a kernel</title>
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| 3 |
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| 4 | <screen>Estimated build time: &kernel-time;
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| 5 | Estimated required disk space: &kernel-compsize;</screen>
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| 6 |
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| 7 | <para>Building the kernel involves a few steps: configuring it and compiling
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| 8 | it. There are a few ways to configure the kernel. If you don't like the
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| 9 | way this book does it, read the <filename>README</filename> that comes
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| 10 | with the kernel source tree, and find out what the other options are.</para>
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| 11 |
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| 12 | <para>Something you could do, is take the .config file from your host
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| 13 | distribution's kernel source tree and copy it to $LFS/usr/src/linux.
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| 14 | This way you don't have to configure the entire kernel from scratch and
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| 15 | can use your current values. If you choose to do this, first run the
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| 16 | make mrproper command below, then copy the .config file over, then run
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| 17 | make menuconfig (make oldconfig may be better in some situations. See
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| 18 | the <filename>README</filename> file for more details when to use make
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| 19 | oldconfig).</para>
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| 20 |
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| 21 | <para>The following commands are run to build the kernel:</para>
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| 22 |
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| 23 | <para><screen><userinput>cd /usr/src/linux &&</userinput>
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| 24 | <userinput>make mrproper &&</userinput>
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| 25 | <userinput>make menuconfig &&</userinput>
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| 26 | <userinput>make dep &&</userinput>
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| 27 | <userinput>make bzImage &&</userinput>
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| 28 | <userinput>make modules &&</userinput>
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| 29 | <userinput>make modules_install &&</userinput>
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| 30 | <userinput>cp arch/i386/boot/bzImage /boot/lfskernel &&</userinput>
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| 31 | <userinput>cp System.map /boot</userinput></screen></para>
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| 32 |
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| 33 | <para>Note: the arch/i386/boot/bzImage path may vary on
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| 34 | different platforms.</para>
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| 35 |
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| 36 | &ab-kernel-dep;
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| 37 |
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| 38 | </sect1>
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| 39 |
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