4.19-stable review patch. If anyone has any objections, please let me know.
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From: Masahiro Yamada yamada.masahiro@socionext.com
commit 238bcbc4e07fad2fff99c5b157d0c37ccd4d093c upstream.
Collect basic Clang options such as --target, --prefix, --gcc-toolchain, -no-integrated-as into a single variable CLANG_FLAGS so that it can be easily reused in other parts of Makefile.
Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com Reviewed-by: Nick Desaulniers ndesaulniers@google.com Tested-by: Nick Desaulniers ndesaulniers@google.com Acked-by: Greg Hackmann ghackmann@google.com Signed-off-by: Nathan Chancellor natechancellor@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- Makefile | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
--- a/Makefile +++ b/Makefile @@ -482,18 +482,17 @@ endif
ifeq ($(cc-name),clang) ifneq ($(CROSS_COMPILE),) -CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%)) +CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD))) -CLANG_PREFIX := --prefix=$(GCC_TOOLCHAIN_DIR) +CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) endif ifneq ($(GCC_TOOLCHAIN),) -CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN) +CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif -KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX) -KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX) -KBUILD_CFLAGS += -no-integrated-as -KBUILD_AFLAGS += -no-integrated-as +CLANG_FLAGS += -no-integrated-as +KBUILD_CFLAGS += $(CLANG_FLAGS) +KBUILD_AFLAGS += $(CLANG_FLAGS) endif
RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register