dev-manual: Updates to "Avoiding Duplicating Include Files" section.

I removed the last paragraph example as it is not a good example.
Unfortunately, there is not a good example so I replaced it with
a minor suggestive work-around at the end of the first paragraph.

Also, used some <replaceable></replaceable> formatting for the
first paragraph.

(From yocto-docs rev: 6c3989fd4fe41a6434d70208d59747060e62a366)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 8 insertions, 20 deletions

diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index f6dd231dce..09e9d5a853 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -273,29 +273,17 @@
                     the included file, use the path relative to the original
                     layer directory to refer to the file.
                     For example, use
-                    <filename>require recipes-core/somepackage/somefile.inc</filename>
-                    instead of <filename>require somefile.inc</filename>.
+                    <filename>require recipes-core/</filename><replaceable>package</replaceable><filename>/</filename><replaceable>file</replaceable><filename>.inc</filename>
+                    instead of <filename>require </filename><replaceable>file</replaceable><filename>.inc</filename>.
                     If you're finding you have to overlay the include file,
                     it could indicate a deficiency in the include file in
                     the layer to which it originally belongs.
-                    If this is the case, you need to address that deficiency
-                    instead of overlaying the include file.
-                </para>
-
-                <para>
-                    For example, consider how support plug-ins for the Qt 4
-                    database are configured.
-                    The Source Directory does not have MySQL or PostgreSQL.
-                    However, OpenEmbedded's layer <filename>meta-oe</filename>
-                    does.
-                    Consequently, <filename>meta-oe</filename> uses
-                    append files to modify the
-                    <filename>QT_SQL_DRIVER_FLAGS</filename> variable to
-                    enable the appropriate plug-ins.
-                    This variable was added to the <filename>qt4.inc</filename>
-                    include file in the Source Directory specifically to allow
-                    the <filename>meta-oe</filename> layer to be able to control
-                    which plug-ins are built.
+                    If this is the case, you should try to address that
+                    deficiency instead of overlaying the include file.
+                    For example, you could address this by getting the
+                    maintainer of the include file to add a variable or
+                    variables to make it easy to override the parts needing
+                    overwritten.
                 </para>
             </section>