kbuild: fix make O=... build
It fixes the following error:
make[1]: *** No rule to make target `include/asm', needed by `arch/alpha/kernel/asm-offsets.s'. Stop.
Reported by:
From: Jan Dittmer <j.dittmer@portrix.net>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/Makefile b/Makefile
index a8d41b7..38384f8 100644
--- a/Makefile
+++ b/Makefile
@@ -779,7 +779,7 @@
# prepare1 creates a makefile if using a separate output directory
prepare1: prepare2 outputmakefile
-prepare0: prepare1 include/linux/version.h $(objtree)/include/asm \
+prepare0: prepare1 include/linux/version.h include/asm \
include/config/MARKER
ifneq ($(KBUILD_MODULES),)
$(Q)rm -rf $(MODVERDIR)
@@ -819,7 +819,7 @@
# hard to detect, but I suppose "make mrproper" is a good idea
# before switching between archs anyway.
-$(objtree)/include/asm:
+include/asm:
@echo ' SYMLINK $@ -> include/asm-$(ARCH)'
$(Q)if [ ! -d include ]; then mkdir -p include; fi;
@ln -fsn asm-$(ARCH) $@