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| author |   Scott Rifenbark <srifenbark@gmail.com> | 2016-07-12 14:10:13 -0700 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2016-07-19 15:04:51 +0100 |
| commit | 640181cce81663b0a2055592382d127eac5d63ba (patch) | |
| tree | 213332d2d8a871a48ecf8e636ccf22b46d6dde56 /documentation | |
| parent | 48336f5139a6d6ff43cb371f7831817cecec0ae9 (diff) | |
| download | openembedded-core-contrib-640181cce81663b0a2055592382d127eac5d63ba.tar.gz | |
ref-manual: Added clarifying note to the BBCLASSEXTEND variable.
Fixes [YOCTO #9909]
Added a note that talks about how the BBCLASSEXTEND mechanism
adds recipe variants.
(From yocto-docs rev: a05990ecb760519a685a1c5ddcf2ce3e048bfbf2)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'documentation')
| -rw-r--r-- | documentation/ref-manual/ref-variables.xml | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml index 3278ccc27e..b876bc3115 100644 --- a/documentation/ref-manual/ref-variables.xml +++ b/documentation/ref-manual/ref-variables.xml @@ -995,6 +995,27 @@ BBCLASSEXTEND =+ "native nativesdk" BBCLASSEXTEND =+ "multilib:<replaceable>multilib_name</replaceable>" </literallayout> + <note> + <para> + Internally, the <filename>BBCLASSEXTEND</filename> + mechanism generates recipe variants by rewriting + variable values and applying overrides such as + <filename>_class-native</filename>. + For example, to generate a native version of a recipe + named "foo", a + <link linkend='var-DEPENDS'><filename>DEPENDS</filename></link> + on "foo" is rewritten to a <filename>DEPENDS</filename> + on "foo-native". + </para> + + <para> + No reparsing, which adds some limitations, of the + recipe is done for each variant. + For example, it is not possible to "include" a + different file depending on the variant, since + "include's" are processed when the recipe is parsed. + </para> + </note> </para> </glossdef> </glossentry> |