linux-kernel - Re: [PATCH v3 1/1] perf tools: fix perf build with ARCH=x86

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Date:   Sun, 9 Apr 2017 19:27:11 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     jiada_wang@...tor.com
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        wangnan0@...wei.com, ravi.bangoria@...ux.vnet.ibm.com,
        mhiramat@...nel.org, linux-kernel@...r.kernel.org,
        erosca@...adit-jv.com
Subject: Re: [PATCH v3 1/1] perf tools: fix perf build with ARCH=x86_64

On Tue, Apr 04, 2017 at 11:25:44PM -0700, jiada_wang@...tor.com wrote:
> From: Jiada Wang <jiada_wang@...tor.com>
> 
> with commit: 0a943cb10ce78 (tools build: Add HOSTARCH Makefile variable)
> the following build failure is seen when build with ARCH=x86_64

is that described somewhere as a valid building interface?
I never use it so I have no idea.. would you describe your
build env/process?

> 
> 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.
> 

> fix this issue by use SRCARCH instead of ARCH in perf.

please describe also the the issue itself in the changelog, not just the fix


so objtool is using SRCARCH this way, I guess it's fine

if we go this way, you also need to change the pmu-events/Build
and there's some comment using $(ARCH) in util/header.c

thanks,
jirka