linux-kernel - Re: [PATCH] arm64: drop CROSS_COMPILE for LLVM=1 LLVM

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Date:   Fri, 2 Jul 2021 13:59:28 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Fangrui Song <maskray@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] arm64: drop CROSS_COMPILE for LLVM=1 LLVM_IAS=1

On Fri, Jul 2, 2021 at 1:55 AM 'Nick Desaulniers' via Clang Built
Linux <clang-built-linux@...glegroups.com> wrote:
>
> +ifneq ($(LLVM),)
> +ifneq ($(LLVM_IAS),)
> +ifeq ($(CROSS_COMPILE),)
> +CLANG_TARGET   :=--target=aarch64-linux
> +CLANG_FLAGS    += $(CLANG_TARGET)
> +KBUILD_CFLAGS  += $(CLANG_TARGET)
> +KBUILD_AFLAGS  += $(CLANG_TARGET)
> +endif
> +endif
> +endif

I think only the "CLANG_TARGET   :=--target=aarch64-linux" line should
go into the
per-architecture Makefile. It doesn't hurt to just set that
unconditionally here,
and then change the CLANG_FLAGS logic in the top-level Makefile to use this
in place of $(notdir $(CROSS_COMPILE:%-=%)).

       Arnd