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

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Message-ID: <CAKwvOdn7QgF2OS_uvV+-mg-7ZeaL316TXhZYziVBbJctyWZGXw@mail.gmail.com>
Date:   Fri, 2 Jul 2021 10:37:53 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Tom Stellard <tstellar@...hat.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Arnd Bergmann <arnd@...nel.org>,
        Fangrui Song <maskray@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] arm64: drop CROSS_COMPILE for LLVM=1 LLVM_IAS=1

On Thu, Jul 1, 2021 at 6:05 PM Tom Stellard <tstellar@...hat.com> wrote:
>
> On 7/1/21 4:55 PM, 'Nick Desaulniers' via Clang Built Linux wrote:
> > We get constant feedback that the command line invocation of make is too
> > long. CROSS_COMPILE is helpful when a toolchain has a prefix of the
> > target triple, or is an absolute path outside of $PATH, but it's mostly
> > redundant for a given ARCH.
> >
> > If CROSS_COMPILE is not set, simply set --target=aarch64-linux for
> > CLANG_FLAGS, KBUILD_CFLAGS, and KBUILD_AFLAGS.
>
> Are there plans to do this for other architectures?

Yep, just starting small to collect feedback on the idea before
blasting maintainers with more patches. The goal is to handle this in
a per arch/ manner, rather than the top level Makefile.
-- 
Thanks,
~Nick Desaulniers