[PATCH 6.4 786/800] LoongArch: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation

Greg Kroah-Hartman
2023-07-16T20:30:39Z

From: WANG Xuerui <git@xen0n.name>

commit 5ddc7a3794ddd3470635ebd325fa1dffea5b18c0 upstream.

This is a port of commit 08f6554ff90e ("mips: Include KBUILD_CPPFLAGS in
CHECKFLAGS invocation") to arch/loongarch, for fixing cross-compilation
of Linux/LoongArch with Clang, where previously the `--target` flag
would no longer be present for the CHECKFLAGS cc invocation leading to
build failure.

Reported-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://github.com/ClangBuiltLinux/linux/issues/1787#issuecomment-1608306002
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/loongarch/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/loongarch/Makefile
+++ b/arch/loongarch/Makefile
@@ -107,7 +107,7 @@ KBUILD_CFLAGS += -isystem $(shell $(CC)
KBUILD_LDFLAGS += -m $(ld-emul)

ifdef CONFIG_LOONGARCH
-CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
+CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
endif