linux-kernel - [PATCH 1/2] Makefile: Remove '--gcc-toolchain' flag

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Message-Id: <20210302210646.3044738-1-nathan@kernel.org>
Date:   Tue,  2 Mar 2021 14:06:45 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com,
        Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH 1/2] Makefile: Remove '--gcc-toolchain' flag

This is not necessary anymore now that we specify '--prefix=', which
tells clang exactly where to find the GNU cross tools. 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.

Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 Makefile | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Makefile b/Makefile
index f9b54da2fca0..c20f0ad8be73 100644
--- a/Makefile
+++ b/Makefile
@@ -568,10 +568,6 @@ 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

base-commit: 7a7fd0de4a9804299793e564a555a49c1fc924cb
-- 
2.31.0.rc0.75.gec125d1bc1