linux-kernel - Re: [PATCH] perf tools: Don't use brace expansion.

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Message-ID: <1281969043.1926.1469.camel@laptop>
Date:	Mon, 16 Aug 2010 16:30:43 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Bernd Petrovitsch <bernd@...rovitsch.priv.at>
Cc:	Kusanagi Kouichi <slash@...auone-net.jp>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tools: Don't use brace expansion.

On Mon, 2010-08-16 at 16:09 +0200, Bernd Petrovitsch wrote:

> > -$(shell sh -c 'mkdir -p $(OUTPUT)scripts/{perl,python}/Perf-Trace-Util/' 2> /dev/null)
> > -$(shell sh -c 'mkdir -p $(OUTPUT)util/{ui/browsers,scripting-engines}/' 2> /dev/null)

> The other solution is to use standard-make features like in
> mkdir -p $(foreach d,ui/browsers scripting-engines,$(OUTPUT)util/$(d)/) 2> /dev/null
> 
> Is there actually a specific reason for the 
> $(shell sh -c '...')
> around?
> It looks superflous.

I think the reason is is that nobody who touched that file really knew
make all that well. Your version looks fine to me.
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