[OE-core] [PATCH 2/2] populate_sdk_ext.bbclass: enhance compatibility with rm_work.bbclass

[Patrick Ohly]

"bitbake -c populate_dsk_ext" must not trigger do_rm_work, because it
is impossible to declare that the additional tasks activated by "-c
populate_dsk_ext" must run before do_rm_work. When do_populate_dsk_ext
and do_rm_work are both active, the resulting race condition breaks
do_populate_dsk_ext.

The existing bitbake dependencies can't be used for that, because
"addtask populate_dsk_ext before do_rm_work" would then always execute
populate_dsk_ext also in normal builds.

do_populate_dsk_ext triggers do_rm_work indirectly through the
dependency on do_build of the SDK_TARGETs. Using the new
do_build_without_rm_work instead (when available, with do_build as
before if not) avoids the problem.

However, one has to be careful to not trigger do_rm_work in the same
build in some other way.  "bitbake core-image-sato:do_populate_sdk_ext
core-image-sato:do_build" still fails, for example. Doing one after
the other works.

Fixes: [YOCTO 11042]

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 meta/classes/populate_sdk_ext.bbclass | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/meta/classes/populate_sdk_ext.bbclass b/meta/classes/populate_sdk_ext.bbclass
index 3bccb14..db822bf 100644
--- a/meta/classes/populate_sdk_ext.bbclass
+++ b/meta/classes/populate_sdk_ext.bbclass
@@ -656,7 +656,12 @@ do_populate_sdk_ext[depends] = "${@d.getVarFlag('do_populate_sdk', 'depends', Fa
                                 ${@'meta-world-pkgdata:do_collect_packagedata' if d.getVar('SDK_INCLUDE_PKGDATA') == '1' else ''} \
                                 ${@'meta-extsdk-toolchain:do_locked_sigs' if d.getVar('SDK_INCLUDE_TOOLCHAIN') == '1' else ''}"
 
-do_populate_sdk_ext[rdepends] += "${@' '.join([x + ':do_build' for x in d.getVar('SDK_TARGETS').split()])}"
+# We must avoid depending on do_build here if rm_work.bbclass is active,
+# because otherwise do_rm_work may run before do_populate_sdk_ext itself.
+# We can't mark do_populate_sdk_ext and do_sdk_depends as having to
+# run before do_rm_work, because then they would also run as part
+# of normal builds.
+do_populate_sdk_ext[rdepends] += "${@' '.join([x + ':' + (d.getVar('RM_WORK_BUILD_WITHOUT') or 'do_build') for x in d.getVar('SDK_TARGETS').split()])}"
 
 # Make sure code changes can result in rebuild
 do_populate_sdk_ext[vardeps] += "copy_buildsystem \
-- 
git-series 0.9.1