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documentation/poky-ref-manual: expand discussion of PR and INC_PR 

Expands a little on PR and INC_PR.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
This commit is contained in:
Paul Eggleton 2010-12-23 13:44:05 +00:00 committed by Richard Purdie
parent 321d70e186
commit 6d5adf1048
2 changed files with 17 additions and 8 deletions
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17
documentation/poky-ref-manual/extendpoky.xml
View File

@ -685,15 +685,20 @@ BBFILE_PRIORITY_emenlow = "6"
This means that for new recipes you must be sure to add the PR variable and set its initial value
equal to "r0".
Failing to define PR makes it easy to miss when you bump a package.
Note that you can only use integer values for the PR variable.
Note that you can only use integer values following the "r" in the PR variable.
</para>
<para>
You can also use the <glossterm><link linkend='var-INC_PR'>INC_PR</link></glossterm> variable
to keep up with package revisioning.
</para>
If you are sharing a common .inc file with multiple recipes, you can also use the
<glossterm><link linkend='var-INC_PR'>INC_PR</link></glossterm> variable to ensure that
the recipes sharing the .inc file are rebuilt when the .inc file itself is changed. The
.inc file must set INC_PR (initially to "r0"), and all recipes referring to it should set PR to
"$(INC_PR).0" initially, incrementing the last number when the recipe is changed. If the
.inc file is changed then its INC_PR should be incremented.
</literallayout>
<para>
When upgrading the version of a package the (<glossterm><link
linkend='var-PV'>PV</link></glossterm>) and PR variables should be reset to "r0".
When upgrading the version of a package, assuming the <glossterm><link
linkend='var-PV'>PV</link></glossterm> changes, the PR variable should be reset to "r0"
(or "$(INC_PR).0" if you are using INC_PR).
</para>
<para>
Usually, version increases occur only to packages.

8
documentation/poky-ref-manual/ref-variables.xml
View File

@ -609,7 +609,7 @@ recipes-graphics/xorg-font/fiont-alias_1.0.2.bb:PR - "$(INC_PR).0"
<glossentry id='var-PR'><glossterm>PR</glossterm>
<glossdef>
<para>Revision of package.
<para>Revision of package. The default value is "r0".
</para>
</glossdef>
</glossentry>
@ -617,7 +617,11 @@ recipes-graphics/xorg-font/fiont-alias_1.0.2.bb:PR - "$(INC_PR).0"
<glossentry id='var-PV'><glossterm>PV</glossterm>
<glossdef>
<para>Version of package.
The default value is "1.0"</para>
This is normally extracted from the recipe name, e.g. if the recipe is named
"expat_2.0.1.bb" then PV will be "2.0.1". PV is generally not overridden within
a recipe unless it is building an unstable version from a source code repository
(git, svn, etc.).
</para>
</glossdef>
</glossentry>