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authorNick Desaulniers <ndesaulniers@google.com>2019-02-11 11:30:04 -0800
committerMasahiro Yamada <yamada.masahiro@socionext.com>2019-02-20 09:42:31 +0900
commitad15006cc78459d059af56729c4d9bed7c7fd860 (patch)
tree27ab315142f2eaea28c979cf507dbdded1564a88 /Makefile
parent1e88e415ebccb9013b92b55e7512938040c53b61 (diff)
downloadlwn-ad15006cc78459d059af56729c4d9bed7c7fd860.tar.gz
lwn-ad15006cc78459d059af56729c4d9bed7c7fd860.zip
kbuild: clang: choose GCC_TOOLCHAIN_DIR not on LD
This causes an issue when trying to build with `make LD=ld.lld` if ld.lld and the rest of your cross tools aren't in the same directory (ex. /usr/local/bin) (as is the case for Android's build system), as the GCC_TOOLCHAIN_DIR then gets set based on `which $(LD)` which will point where LLVM tools are, not GCC/binutils tools are located. Instead, select the GCC_TOOLCHAIN_DIR based on another tool provided by binutils for which LLVM does not provide a substitute for, such as elfedit. Fixes: 785f11aa595b ("kbuild: Add better clang cross build support") Link: https://github.com/ClangBuiltLinux/linux/issues/341 Suggested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 681bed05d104..660e10ac2012 100644
--- a/Makefile
+++ b/Makefile
@@ -495,7 +495,7 @@ endif
ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
ifneq ($(CROSS_COMPILE),)
CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%))
-GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD)))
+GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)
GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
endif