linux-kernel - Re: [PATCH] objtool: use $(SRCARCH) to avoid compile error with ARCH=x86

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Date:   Fri, 17 Jan 2020 10:44:07 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Shile Zhang <shile.zhang@...ux.alibaba.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] objtool: use $(SRCARCH) to avoid compile error with
 ARCH=x86_64

On Fri, Dec 27, 2019 at 10:29:31AM +0800, Shile Zhang wrote:
> To build objtool with ARCH=x86_64 will failed as:
> 
>    $make ARCH=x86_64 -C tools/objtool
>    ...
>      CC       arch/x86/decode.o
>    arch/x86/decode.c:10:22: fatal error: asm/insn.h: No such file or directory
>     #include <asm/insn.h>
>                          ^
>    compilation terminated.
>    mv: cannot stat ‘arch/x86/.decode.o.tmp’: No such file or directory
>    make[2]: *** [arch/x86/decode.o] Error 1
>    ...
> 
> The root cause is the command-line variable 'ARCH' cannot be overridden.
> It can be replaced by the one 'SRCARCH' defined in
> 'tools/scripts/Makefile.arch'.
> 
> Signed-off-by: Shile Zhang <shile.zhang@...ux.alibaba.com>

Thanks.  I'll submit it to the -tip tree.

-- 
Josh