From c91d4e47e10ee4d3163838b1b727fe1d0664115b Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Tue, 9 Mar 2021 13:59:14 -0700 Subject: [PATCH] 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 Reviewed-by: Fangrui Song Reviewed-by: Nick Desaulniers Tested-by: Nick Desaulniers Tested-by: Sedat Dilek Signed-off-by: Masahiro Yamada --- Makefile | 4 ---- 1 file changed, 4 deletions(-) diff --git a/Makefile b/Makefile index 03e3ee982f14..40bfd059b5ef 100644 --- a/Makefile +++ b/Makefile @@ -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