linux-kernel - Re: [PATCH] objtool: Allow AR to be overridden with HOSTAR

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Message-ID: <20190515151850.g2syltlev4fa7tud@treble>
Date:   Wed, 15 May 2019 10:18:50 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] objtool: Allow AR to be overridden with HOSTAR

On Tue, May 14, 2019 at 03:40:47PM -0700, Nathan Chancellor wrote:
> Currently, this Makefile hardcodes GNU ar, meaning that if it is not
> available, there is no way to supply a different one and the build will
> fail.
> 
> $ make AR=llvm-ar CC=clang LD=ld.lld HOSTAR=llvm-ar HOSTCC=clang \
>        HOSTLD=ld.lld HOSTLDFLAGS=-fuse-ld=lld defconfig modules_prepare
> ...
>   AR       /out/tools/objtool/libsubcmd.a
> /bin/sh: 1: ar: not found
> ...
> 
> Follow the logic of HOST{CC,LD} and allow the user to specify a
> different ar tool via HOSTAR (which is used elsewhere in other
> tools/ Makefiles).
> 
> Link: https://github.com/ClangBuiltLinux/linux/issues/481
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

Thanks Nathan.  I'll send it along to the tip tree.

-- 
Josh