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dev-manual: General clean-up edits to the customizing images section 

Edits to add a link and create a more active voice throughout
this section.

(From yocto-docs rev: 2cb62dab03d5ca4de9c9310c4d075fc643b7e68a)

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 2013-04-02 13:33:10 -07:00 committed by Richard Purdie
parent 0e0ee96186
commit c47dfebff6
1 changed files with 31 additions and 21 deletions
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52
documentation/dev-manual/dev-manual-common-tasks.xml
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@ -606,38 +606,48 @@
<filename>EXTRA_IMAGE_FEATURES</filename></title>
<para>
Ultimately users might want to add extra image features to the set by using the
Ultimately, you might want to add extra image features to the
set by using the
<filename><ulink url='&YOCTO_DOCS_REF_URL;#var-IMAGE_FEATURES'>IMAGE_FEATURES</ulink></filename>
variable.
To create these features, the best reference is
<filename>meta/classes/core-image.bbclass</filename>, which shows how this is
achieved.
<filename>meta/classes/core-image.bbclass</filename>, which
shows how you can add features.
In summary, the file looks at the contents of the
<filename>IMAGE_FEATURES</filename>
variable and then maps that into a set of tasks or packages.
Based on this information, the
<filename>IMAGE_FEATURES</filename> variable and then maps those
contents into a set of tasks or packages.
Based on this information, the build system automatically
generates the
<filename><ulink url='&YOCTO_DOCS_REF_URL;#var-IMAGE_INSTALL'> IMAGE_INSTALL</ulink></filename>
variable is generated automatically.
Users can add extra features by extending the class or creating a custom class for use
with specialized image <filename>.bb</filename> files.
variable.
You can add extra features by extending the class or creating a
custom class for use with specialized image
<filename>.bb</filename> files.
You can also add more features by configuring the
<filename><ulink url='&YOCTO_DOCS_REF_URL;#var-EXTRA_IMAGE_FEATURES'>EXTRA_IMAGE_FEATURES</ulink></filename>
variable in the <filename>local.conf</filename> file found in the Source Directory
located in the Build Directory.
variable in the <filename>local.conf</filename> file found in
the <filename>local.conf</filename> file, which is located in
the <link linkend='build-directory'>Build Directory</link>.
</para>
<para>
The Yocto Project ships with two SSH servers you can use in your images:
Dropbear and OpenSSH.
Dropbear is a minimal SSH server appropriate for resource-constrained environments,
while OpenSSH is a well-known standard SSH server implementation.
By default, the <filename>core-image-sato</filename> image is configured to use Dropbear.
The <filename>core-image-basic</filename> and <filename>core-image-lsb</filename>
images both include OpenSSH.
The <filename>core-image-minimal</filename> image does not contain an SSH server.
To change these defaults, edit the <filename>IMAGE_FEATURES</filename> variable
The Yocto Project ships with two SSH servers you can use in your
images: Dropbear and OpenSSH.
Dropbear is a minimal SSH server appropriate for
resource-constrained environments, while OpenSSH is a well-known
standard SSH server implementation.
By default, the <filename>core-image-sato</filename> image is
configured to use Dropbear.
The <filename>core-image-basic</filename> and
<filename>core-image-lsb</filename> images both
include OpenSSH.
The <filename>core-image-minimal</filename> image does not
contain an SSH server.
To change these defaults, edit the
<filename>IMAGE_FEATURES</filename> variable
so that it sets the image you are working with to include
<filename>ssh-server-dropbear</filename> or <filename>ssh-server-openssh</filename>.
<filename>ssh-server-dropbear</filename> or
<filename>ssh-server-openssh</filename>.
</para>
</section>