ref-manual: Added bootimg class description.
(From yocto-docs rev: 01e51a69b3102e2a52826383762e8148d37933bf) Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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</para>
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</para>
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</section>
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</section>
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<section id='ref-classes-bootimg.bbclass'>
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<title><filename>bootimg.bbclass</filename></title>
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<para>
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The boot image (<filename>bootimg</filename> class creates a bootable
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image using SYSLINUX, your kernel and an optional initial ram disk
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(<filename>initrd</filename>).
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</para>
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<para>
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When you use this class, two things happen:
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<itemizedlist>
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<listitem><para>
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A <filename>.hddimg</filename> file is created.
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This file which is an MSDOS filesystem that contains SYSLINUX,
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a kernel, an <filename>initrd</filename>, and a root filesystem
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image.
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All three of these can be written to hard drives directly and
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also booted on a USB flash disks using <filename>dd</filename>.
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</para></listitem>
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<listitem><para>
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A CD <filename>.iso</filename> image is created.
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When this file is booted, the <filename>initrd</filename>
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boots and processes the label selected in SYSLINUX.
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Actions based on the label are then performed (e.g. installing
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to a hard drive).</para></listitem>
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</itemizedlist>
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</para>
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<para>
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The <filename>bootimg</filename> class supports the
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<link linkend='var-INITRD'><filename>INITRD</filename></link>,
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<link linkend='var-NOISO'><filename>NOISO</filename></link>,
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<link linkend='var-NOHDD'><filename>NOHDD</filename></link>, and
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<link linkend='var-ROOTFS'><filename>ROOTFS</filename></link>
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variables.
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</para>
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</section>
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<section id='ref-classes-debian'>
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<section id='ref-classes-debian'>
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<title>Debian Renaming - <filename>debian.bbclass</filename></title>
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<title>Debian Renaming - <filename>debian.bbclass</filename></title>
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