The powerpc kernel of the WD My Book Live differs between builds. The
difference sits in the vDSO, which the kernel embeds with its debug
information as vdso32.so.dbg:
-GNU C11 14.4.0 ... -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 -mstack-protector-guard-offset=872 -m32 -g -O2 ...
+GNU C11 14.4.0 ... -m32 -g -O2 ...
stack_protector_prepare appends these flags to KBUILD_CFLAGS with $(eval)
from its recipe, while vdso_prepare builds the vDSO from a sibling
prerequisite of prepare. Nothing orders the two, so whether the flags
end up in DW_AT_producer depends on the order in which make starts them.
Add a pending patch that makes vdso_prepare depend on
stack_protector_prepare.
Link: https://github.com/openwrt/openwrt/pull/25429
Signed-off-by: Paul Spooren <mail@aparcar.org>
Paul Spooren
edd23eb01e