ref-manual: Updated the allarch class description.

Added a patch to include a note from Andre.

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Andre Draszik 2015-10-21 23:10:52 +01:00 committed by Richard Purdie
parent a8674ae642
commit 7d30d67b26
1 changed files with 14 additions and 12 deletions

View File

@ -52,20 +52,22 @@
and a C library as pre-requisites, and splitting out of debug symbols
during packaging).
<note>
Unlike e.g. Debian, OpenEmbedded recipes that produce packages
which
<para>Unlike some distro recipes (e.g. Debian), OpenEmbedded recipes
that produce packages that depend on tunings through use of the
<link linkend='var-RDEPENDS'><filename>RDEPENDS</filename></link>
on
and
<link linkend='var-TUNE_PKGARCH'><filename>TUNE_PKGARCH</filename></link>
packages should never be made <filename>allarch</filename>, even
if they do not produce architecture-specific output. This would
cause the do_package_write_* tasks to have different signatures
for
<link linkend='var-MACHINE'><filename>MACHINE</filename></link>s
with different
<link linkend='var-TUNE_PKGARCH'><filename>TUNE_PKGARCH</filename></link>,
thus unnecessary rebuilds every single time an image for a different
MACHINE is built (even without any change to the recipe).
variables, should never be configured for all architectures
using <filename>allarch</filename>.
This is the case even if the recipes do not produce
architecture-specific output.</para>
<para>Configuring such recipes for all architectures causes the
<link linkend='ref-tasks-package_write_deb'><filename>do_package_write_*</filename></link>
tasks to have different signatures for the machines with different
tunings.
Additionally, unnecessary rebuilds occur every time an
image for a different <filename>MACHINE</filename> is built
even when the recipe never changes.</para>
</note>
</para>