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authorMasahiro Yamada <masahiroy@kernel.org>2020-03-26 14:57:18 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2020-03-29 22:37:53 +0900
commitaa824e0c962b532d5073cbb41b2efcd6f5e72bae (patch)
tree082eaedd2e740d9449ebb96500dde23b6b1784ce
parent7d7df745b0a63af33415ec234b29b9d6ed59ad8c (diff)
downloadlinux-aa824e0c962b532d5073cbb41b2efcd6f5e72bae.tar.bz2
kbuild: remove AS variable
As commit 5ef872636ca7 ("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>
-rw-r--r--Makefile5
1 files changed, 2 insertions, 3 deletions
diff --git a/Makefile b/Makefile
index 7863d2a8de6c..89e1eb75c819 100644
--- a/Makefile
+++ b/Makefile
@@ -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