diff options
| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-04-08 10:36:22 +0900 |
|---|---|---|
| committer | Bruno Martins <bgcngm@gmail.com> | 2022-10-28 15:57:24 +0100 |
| commit | 6634f9f63efe0d1e4e4c4942bf3061ffb0aff65b (patch) | |
| tree | d913f88bd22cd10f5e3c3e1066d780deb85aaadd | |
| parent | b891e8fdc46636722509c1b9341d4ca09232578f (diff) | |
BACKPORT: kbuild: replace AS=clang with LLVM_IAS=1
commit 7e20e47c70f810d678d02941fa3c671209c4ca97 upstream.
The 'AS' variable is unused for building the kernel. Only the remaining
usage is to turn on the integrated assembler. A boolean flag is a better
fit for this purpose.
AS=clang was added for experts. So, I replaced it with LLVM_IAS=1,
breaking the backward compatibility.
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry-picked from commit 7e20e47c70f810d678d02941fa3c671209c4ca97)
Change-Id: I1dcf901b2543ee6a95cfffddd2ced50b0a1ae14c
| -rw-r--r-- | Documentation/kbuild/llvm.txt | 5 | ||||
| -rw-r--r-- | Makefile | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/kbuild/llvm.txt b/Documentation/kbuild/llvm.txt index d469accd5fa3..51c009baa35a 100644 --- a/Documentation/kbuild/llvm.txt +++ b/Documentation/kbuild/llvm.txt @@ -50,11 +50,14 @@ LLVM Utilities LLVM has substitutes for GNU binutils utilities. These can be invoked as additional parameters to [make]{.title-ref}. -> make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \\ +> make CC=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \\ > OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump OBJSIZE=llvm-size \\ > READELF=llvm-readelf HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar \\ > HOSTLD=ld.lld +Currently, the integrated assembler is disabled by default. You can pass +`LLVM_IAS=1` to enable it. + Getting Help ------------ @@ -622,7 +622,9 @@ endif ifneq ($(GCC_TOOLCHAIN),) CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif +ifneq ($(LLVM_IAS),1) CLANG_FLAGS += -no-integrated-as +endif CLANG_FLAGS += -Werror=unknown-warning-option CLANG_FLAGS += $(call cc-option, -Wno-misleading-indentation) CLANG_FLAGS += $(call cc-option, -Wno-bool-operation) |