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authorNathan Chancellor <natechancellor@gmail.com>2019-06-27 12:14:48 -0700
committerMasahiro Yamada <yamada.masahiro@socionext.com>2019-07-04 08:28:29 +0900
commit876a0600896c1857c79cb58625ff012b27fea9fd (patch)
tree6f5f84b6c2913d42ecc5d4a775e7b0f23b757a56
parent6f9ac9f4427ec0470ccffbf852cfaf326677cc21 (diff)
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kbuild: Add ability to test Clang's integrated assembler
There are some people interested in experimenting with Clang's integrated assembler. To make it easy to do so without source modification, allow the user to specify 'AS=clang' as part of the make command to avoid adding '-no-integrated-as' to the {A,C}FLAGS. Link: https://github.com/ClangBuiltLinux/linux/issues/577 Suggested-by: Dmitry Golovin <dima@golovin.in> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
-rw-r--r--Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index c3b6dcd5b177..d6c3dbac312b 100644
--- a/Makefile
+++ b/Makefile
@@ -527,7 +527,9 @@ endif
ifneq ($(GCC_TOOLCHAIN),)
CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
endif
+ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
CLANG_FLAGS += -no-integrated-as
+endif
CLANG_FLAGS += -Werror=unknown-warning-option
KBUILD_CFLAGS += $(CLANG_FLAGS)
KBUILD_AFLAGS += $(CLANG_FLAGS)