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From:   Masahiro Yamada <masahiroy@kernel.org>
Date:   Thu, 8 Jul 2021 17:44:52 +0900
Message-ID: <CAK7LNAQ2e8eNpuPwYd+dnx1nu_R6FM2X=aH1VUNa=09ebEEyaw@mail.gmail.com>
Subject: Re: [PATCH 2/2] Makefile: drop CROSS_COMPILE for LLVM=1 LLVM_IAS=1
To:     Geert Uytterhoeven <geert@linux-m68k.org>
Cc:     Nick Desaulniers <ndesaulniers@google.com>,
        Miguel Ojeda <ojeda@kernel.org>,
        Fangrui Song <maskray@google.com>,
        Michal Marek <michal.lkml@markovi.net>,
        Arnd Bergmann <arnd@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-kbuild <linux-kbuild@vger.kernel.org>,
        clang-built-linux <clang-built-linux@googlegroups.com>,
        Nathan Chancellor <nathan@kernel.org>
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On Thu, Jul 8, 2021 at 5:08 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> Hi Nick,
>
> On Thu, Jul 8, 2021 at 1:12 AM Nick Desaulniers <ndesaulniers@google.com> 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= for CLANG_FLAGS,
> > KBUILD_CFLAGS, and KBUILD_AFLAGS based on $ARCH.
> >
> > Previously, we'd cross compile via:
> > $ ARCH=arm64 CROSS_COMPILE=aarch64-linxu-gnu make LLVM=1 LLVM_IAS=1
>
> Which didn't really work, I assume? (s/linxu/linux/)

Also
s/gnu/gnu-/


-- 
Best Regards
Masahiro Yamada