linux-kernel - Re: [PROBLEM] perf requires python-devel to compile

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Message-ID: <516CD300.6070201@gmail.com>
Date:	Mon, 15 Apr 2013 21:26:40 -0700
From:	David Ahern <dsahern@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>
CC:	Pekka Enberg <penberg@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Michael Witten <mfwitten@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PROBLEM] perf requires python-devel to compile

On 4/15/13 7:14 PM, Namhyung Kim wrote:
>> Makefile:755: The path '/usr/bin/python-config' is not executable.
>> Makefile:755: *** Please set 'PYTHON_CONFIG' appropriately.  Stop.
>>
>> The problem is that I didn't have python-devel package installed and
>> get-executable-or-default decides to error out instead of letting the
>> Makefile disable Python support.
>
> Right.  I think the get-executable-or-default should not error out in
> this case but just emit a warning and keep building.
>
> Does following patch fix your problem?
>
> -----------8<-------------8<-------------
> diff --git a/tools/perf/config/utilities.mak b/tools/perf/config/utilities.mak
> index 8ef3bd30a549..3b8036f8aca4 100644
> --- a/tools/perf/config/utilities.mak
> +++ b/tools/perf/config/utilities.mak
> @@ -177,7 +177,7 @@ $(if $($(1)),$(call _ge_attempt,$($(1)),$(1)),$(call _ge_attempt,$(2),$(1)))
>   endef
>   _ge_attempt = $(if $(get-executable),$(get-executable),$(_gea_warn)$(call _gea_err,$(2)))
>   _gea_warn = $(warning The path '$(1)' is not executable.)
> -_gea_err  = $(if $(1),$(error Please set '$(1)' appropriately))
> +_gea_err  = $(if $(1),$(warning Please set '$(1)' appropriately))

In this case you don't want a warning, you just want python support 
disabled and move on. I've been getting around this in a minimal install 
of F18 in a VM using PYTHON_CONFIG=/bin/false; haven't had time to 
search for the proper solution.

David


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