kbuild: remove AS variable (aa824e0c) · Commits · 戴 / test

As commit ("kbuild: get rid of misleading $(AS) from documents") noted, we rarely use $(AS) directly in the kernel build. Now that the only/last user of $(AS) in drivers/net/wan/Makefile was converted to $(CC), $(AS) is no longer used in the build process. You can still pass in AS=clang, which is just a switch to turn on the LLVM integrated assembler. Signed-off-by:

Masahiro Yamada <masahiroy@kernel.org> Reviewed-by:

Nick Desaulniers <ndesaulniers@google.com> Tested-by:

Nick Desaulniers <ndesaulniers@google.com> Reviewed-by:

Nathan Chancellor <natechancellor@gmail.com>

Makefile

+2 −3

Original line number	Diff line number	Diff line
		@@ -408,7 +408,6 @@ KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
		KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)

		# Make variables (CC, etc...)
		AS = $(CROSS_COMPILE)as
		LD = $(CROSS_COMPILE)ld
		CC = $(CROSS_COMPILE)gcc
		CPP = $(CC) -E
		@@ -475,7 +474,7 @@ KBUILD_LDFLAGS :=
		GCC_PLUGINS_CFLAGS :=
		CLANG_FLAGS :=

		export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
		export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
		export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
		export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
		export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
		@@ -538,7 +537,7 @@ endif
		ifneq ($(GCC_TOOLCHAIN),)
		CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
		endif
		ifeq ($(shell $(AS) --version 2>&1 \| head -n 1 \| grep clang),)
		ifeq ($(if $(AS),$(shell $(AS) --version 2>&1 \| head -n 1 \| grep clang)),)
		CLANG_FLAGS += -no-integrated-as
		endif
		CLANG_FLAGS += -Werror=unknown-warning-option

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