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Date: Tue, 4 Apr 2017 10:58:09 -0300
From: Arnaldo Carvalho de Melo <acme@redhat.com>
To: jiada_wang@mentor.com
Cc: jpoimboe@redhat.com, linux-kernel@vger.kernel.org,
        erosca@de.adit-jv.com, acme@kernel.org
Subject: Re: [PATCH v2 1/1] tools build: transform ARCH to supported values
Message-ID: <20170404135809.GA2607@redhat.com>
References: <1491201719-3532-1-git-send-email-jiada_wang@mentor.com>
 <1491201719-3532-2-git-send-email-jiada_wang@mentor.com>
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Em Sun, Apr 02, 2017 at 11:41:59PM -0700, jiada_wang@mentor.com escreveu:
> From: Jiada Wang <jiada_wang@mentor.com>
> 
> with commit: 0a943cb10ce7 (tools build: Add HOSTARCH Makefile variable)
> the following build failure is seen with ARCH=x86_84
> 
> In file included from util/event.c:2:0:
> tools/include/uapi/linux/mman.h:4:27: fatal error: uapi/asm/mman.h: No such file or directory
> compilation terminated.
> 
> This patch by evaluate ARCH to supported values just as the behavior before
> above mentioned patch to fix the issue.

Humm, why not use what the kernel proper uses
6752ed90da032af72f2f1fa23d1abf0889b56db0), and that objtool adopted in:

commit 60cbdf5d051d4f4db23d267d511ca241d4be7c0d
Author: Josh Poimboeuf <jpoimboe@redhat.com>
Date:   Fri Jul 22 14:19:20 2016 -0500

    tools build: Fix objtool build with ARCH=x86_64
    
    The objtool build fails in a cross-compiled environment on a non-x86
    host with "ARCH=x86_64":

- Arnaldo
 
> Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
> Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
> ---
>  tools/scripts/Makefile.arch |    6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/scripts/Makefile.arch b/tools/scripts/Makefile.arch
> index ad85b92..41cfc56 100644
> --- a/tools/scripts/Makefile.arch
> +++ b/tools/scripts/Makefile.arch
> @@ -1,4 +1,4 @@
> -HOSTARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
> +purify-arch = $(shell echo $1 | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
>                                    -e s/sun4u/sparc/ -e s/sparc64/sparc/ \
>                                    -e /arm64/!s/arm.*/arm/ -e s/sa110/arm/ \
>                                    -e s/s390x/s390/ -e s/parisc64/parisc/ \
> @@ -6,8 +6,12 @@ HOSTARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
>                                    -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
>                                    -e s/tile.*/tile/ )
>  
> +HOSTARCH := $(call purify-arch,$(shell uname -m))
> +
>  ifndef ARCH
>  ARCH := $(HOSTARCH)
> +else
> +ARCH := $(call purify-arch,$(ARCH))
>  endif
>  
>  SRCARCH := $(ARCH)
> -- 
> 1.7.9.5
>