powerpc/boot: Set target when cross-compiling for clang

Clang needs to be told which target it is building for when cross
compiling.

Link: https://github.com/ClangBuiltLinux/linux/issues/259
Signed-off-by: Joel Stanley <joel@jms.id.au>
Tested-by: Daniel Axtens <dja@axtens.net> # powerpc 64-bit BE
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 39354365f54a5ebcbf0b087155e698ebf8337137..111f97b1ccec994a0fbb3da00864dd2bb5fceefa 100644 (file)
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -55,6 +55,11 @@ BOOTAFLAGS   := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
 
 BOOTARFLAGS    := -cr$(KBUILD_ARFLAGS)
 
+ifdef CONFIG_CC_IS_CLANG
+BOOTCFLAGS += $(CLANG_FLAGS)
+BOOTAFLAGS += $(CLANG_FLAGS)
+endif
+
 ifdef CONFIG_DEBUG_INFO
 BOOTCFLAGS     += -g
 endif