lfs-book/chapter08/kernel.xml

<sect1 id="ch08-kernel">
<title>Installing a kernel</title>

<screen>Estimated build time:           &kernel-time;
Estimated required disk space:  &kernel-compsize;</screen>

<para>Building the kernel involves a few steps: configuring it and compiling
it. There are a few ways to configure the kernel. If you don't like the
way this book does it, read the <filename>README</filename> that comes
with the kernel source tree, and find out what the other options are.</para>

<para>Something you could do, is take the .config file from your host
distribution's kernel source tree and copy it to $LFS/usr/src/linux.
This way you don't have to configure the entire kernel from scratch and
can use your current values. If you choose to do this, first run the
make mrproper command below, then copy the .config file over, then run
make menuconfig (make oldconfig may be better in some situations. See
the <filename>README</filename> file for more details when to use make
oldconfig).</para>

<para>The following commands are run to build the kernel:</para>

<para><screen><userinput>cd /usr/src/linux &amp;&amp;</userinput>
<userinput>make mrproper &amp;&amp;</userinput>
<userinput>make menuconfig &amp;&amp;</userinput>
<userinput>make dep &amp;&amp;</userinput>
<userinput>make bzImage &amp;&amp;</userinput>
<userinput>make modules &amp;&amp;</userinput>
<userinput>make modules_install &amp;&amp;</userinput>
<userinput>cp arch/i386/boot/bzImage /boot/lfskernel &amp;&amp;</userinput>
<userinput>cp System.map /boot</userinput></screen></para>

<para>Note: the arch/i386/boot/bzImage path may vary on 
different platforms.</para>

&ab-kernel-dep;

</sect1>