powerpc: crtsaveres.o needed only when -Os flag is enabled
Currently on powerpc arch, out-of-tree module fails to build without
crtsaveres.o, even when the module has no dependency on the symbols
provided by the file; when built without the -Os flag.
BTW: '-Os' flag is enabled when CONFIG_CC_OPTIMIZE_FOR_SIZE is
configured.
This patch fixes that problem.
Signed-off-by: Ram Pai <linux...@us.ibm.com>
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 4c0cedf..cf12f38 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -157,7 +157,10 @@ CPP = $(CC) -E $(KBUILD_CFLAGS)
CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__
-D__powerpc$(CONFIG_WORD_SIZE)__
+ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
+endif
+
# No AltiVec or VSX instructions when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
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