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dev-manual: Added yocto-layer script note and updated kernel version 

I added a bit about the layer creation in the patching the kernel
section.  The example does it by hand and now you could obviously
use the yocto-layer create script.  I made a note of saying the
example does it by hand.

Also, in the menuconfig example.  I updated the kernel version from
3.4 to 3.14.  It was very old.

(From yocto-docs rev: 2696d4e45bccbb910c3d721e3f1d46d48309ee6d)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark 2014-03-18 17:02:37 -06:00 committed by Richard Purdie
parent fceba79bf7
commit 24ee5fa913
1 changed files with 21 additions and 6 deletions
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27
documentation/dev-manual/dev-manual-common-tasks.xml
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@ -2989,7 +2989,7 @@
</para>
<para>
Consider an example that configures the <filename>linux-yocto-3.4</filename>
Consider an example that configures the <filename>linux-yocto-3.14</filename>
kernel.
The OpenEmbedded build system recognizes this kernel as
<filename>linux-yocto</filename>.
@ -3023,18 +3023,18 @@
The actual <filename>.config</filename> is located in the area where the
specific kernel is built.
For example, if you were building a Linux Yocto kernel based on the
Linux 3.4 kernel and you were building a QEMU image targeted for
Linux 3.14 kernel and you were building a QEMU image targeted for
<filename>x86</filename> architecture, the
<filename>.config</filename> file would be located here:
<literallayout class='monospaced'>
poky/build/tmp/work/qemux86-poky-linux/linux-yocto-3.4.11+git1+84f...
poky/build/tmp/work/qemux86-poky-linux/linux-yocto-3.14.11+git1+84f...
...656ed30-r1/linux-qemux86-standard-build
</literallayout>
<note>
The previous example directory is artificially split and many of the characters
in the actual filename are omitted in order to make it more readable.
Also, depending on the kernel you are using, the exact pathname
for <filename>linux-yocto-3.4...</filename> might differ.
for <filename>linux-yocto-3.14...</filename> might differ.
</note>
</para>
@ -3227,7 +3227,9 @@
<para>
The example assumes a clean build exists for the <filename>qemux86</filename>
machine in a Source Directory named <filename>poky</filename>.
machine in a
<link linkend='source-directory'>Source Directory</link>
named <filename>poky</filename>.
Furthermore, the <link linkend='build-directory'>Build Directory</link> is
<filename>build</filename> and is located in <filename>poky</filename> and
the kernel is based on the Linux 3.4 kernel.
@ -3246,7 +3248,20 @@
<title>Create a Layer for your Changes</title>
<para>
The first step is to create a layer so you can isolate your changes:
The first step is to create a layer so you can isolate your
changes.
Rather than use the <filename>yocto-layer</filename> script
to create the layer, this example steps through the process
by hand.
If you want information on the script that creates a general
layer, see the
"<link linkend='creating-a-general-layer-using-the-yocto-layer-script'>Creating a General Layer Using the yocto-layer Script</link>"
section.
</para>
<para>
These two commands create a directory you can use for your
layer:
<literallayout class='monospaced'>
$ cd ~/poky
$ mkdir meta-mylayer