Commit 238bcbc4 authored by Masahiro Yamada's avatar Masahiro Yamada
Browse files

kbuild: consolidate Clang compiler flags 



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: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Tested-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Acked-by: default avatarGreg Hackmann <ghackmann@google.com>
parent dbe27a00

Makefile

+6 −7
Original line number Diff line number Diff line
@@ -487,18 +487,17 @@ endif 


ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep 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

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