diff --git a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml
index 999d295e13..310b9d20d6 100644
--- a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml
+++ b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml
@@ -899,11 +899,12 @@
The inherit directive is a rudimentary
- means of specifying what classes of functionality your
- recipes require.
+ means of specifying functionality contained in class files
+ that your recipes require.
For example, you can easily abstract out the tasks involved in
building a package that uses Autoconf and Automake and put
- those tasks into a class file that can be used by your recipe.
+ those tasks into a class file and then have your recipe
+ inherit that class file.
@@ -925,10 +926,13 @@
- If necessary, it is possible to inherit a class
- conditionally by using
- a variable expression after the inherit
- statement.
+ An advantage with the inherit directive as compared to both
+ the
+ include and
+ require directives
+ is that you can inherit class files conditionally.
+ You can accomplish this by using a variable expression
+ after the inherit statement.
Here is an example:
inherit ${VARNAME}
@@ -984,6 +988,17 @@
within BBPATH.
+
+ The include directive is a more generic method of including
+ functionality as compared to the
+ inherit directive,
+ which is restricted to class (i.e. .bbclass)
+ files.
+ The include directive is applicable for any other kind of
+ shared or encapsulated functionality or configuration that
+ does not suit a .bbclass file.
+
+
As an example, suppose you needed a recipe to include some
self-test definitions:
@@ -1017,6 +1032,18 @@
being parsed at the location of the directive.
+
+ The require directive, like the include directive previously
+ described, is a more generic method of including
+ functionality as compared to the
+ inherit directive,
+ which is restricted to class (i.e. .bbclass)
+ files.
+ The require directive is applicable for any other kind of
+ shared or encapsulated functionality or configuration that
+ does not suit a .bbclass file.
+
+
Similar to how BitBake handles
include,