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| author | Nathan Chancellor <nathan@kernel.org> | 2021-03-09 23:59:14 +0300 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2021-04-24 23:12:55 +0300 |
| commit | c91d4e47e10ee4d3163838b1b727fe1d0664115b (patch) | |
| tree | f224f619bf3ce567c28ed5db8b24c9829825aeee | |
| parent | a34e6d1e4a49035203819425694349caa004992a (diff) | |
| download | linux-c91d4e47e10ee4d3163838b1b727fe1d0664115b.tar.xz | |
Makefile: Remove '--gcc-toolchain' flag
This flag was originally added to allow clang to find the GNU cross
tools in commit 785f11aa595b ("kbuild: Add better clang cross build
support"). This flag was not enough to find the tools at times so
'--prefix' was added to the list in commit ef8c4ed9db80 ("kbuild: allow
to use GCC toolchain not in Clang search path") and improved upon in
commit ca9b31f6bb9c ("Makefile: Fix GCC_TOOLCHAIN_DIR prefix for Clang
cross compilation"). Now that '--prefix' specifies a full path and
prefix, '--gcc-toolchain' serves no purpose because the kernel builds
with '-nostdinc' and '-nostdlib'.
This has been verified with self compiled LLVM 10.0.1 and LLVM 13.0.0 as
well as a distribution version of LLVM 11.1.0 without binutils in the
LLVM toolchain locations.
Link: https://reviews.llvm.org/D97902
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| -rw-r--r-- | Makefile | 4 |
1 files changed, 0 insertions, 4 deletions
@@ -581,10 +581,6 @@ ifneq ($(CROSS_COMPILE),) CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) -GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) -endif -ifneq ($(GCC_TOOLCHAIN),) -CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif ifneq ($(LLVM_IAS),1) CLANG_FLAGS += -no-integrated-as |