can't build modules after clean for powerpc
From: Darren Hart
Date: Tue Aug 16 2011 - 20:37:03 EST
According to the Makefile comments and
Documentation/kconfig/makefile.txt, make clean should leave enough
intact to build modules with:
###
# Cleaning is done on three levels.
# make clean Delete most generated files
# Leave enough to build external modules
The following line in the arch/powerpc/Makefile prevents that from working:
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
External module compilation fails to link as it can't find
arch/powerpc/lib/crtsavres.o.
It appears from the make logs that crtsavres.o is linked in to
built-in.o, and thus vmlinux. If that is the case, it doesn't seem like
crtsavres.o should need to be singled out. What am I missing here?
If I comment it out:
#KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
my example module builds successfully.
If it is necessary, then we need a means to instruct the top level
makefile to not delete it during "clean". Is there such a directive?
KBUILD_CLEAN_EXCLUDE_MODULES or something?
Thanks,
--
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel
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