archiver.bbclass: do not cause kernel rebuilds
Adding or removing archiver.bbclass from a build configuration causes
rebuilds of linux-yocto-based kernels because of the
do_kernel_configme->do_unpack_and_patch task dependency.
This particular dependency can be ignored for the do_kernel_configme
sstate signature calculcation. Idea for the fix from Richard Purdie.
Note that building the kernel and adding archiver.bbclass later to
archive sources leads to do_unpack_and_patch running after
do_kernel_configme (because that already ran in the first build),
which might be problematic. This is independent of the change here.
The use case in YOCTO #11441 is to removed archiver.bbclass between a
production build with archiving enabled and builds via oe-selftests
without archiving. That direction is fine.
Fixes: YOCTO #11441
(From OE-Core rev:
fed0ed82928e6a7846fbad233ac657bd17bcefc7)
(From OE-Core rev:
201c634946d07c8d0ab6d486e5031b4479eb6707)
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
