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Date: Wed, 19 Nov 2014 16:31:50 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>, Andi Kleen <andi@firstfloor.org>,
        Jiri Olsa <jolsa@kernel.org>, linux-kernel@vger.kernel.org,
        Namhyung Kim <namhyung@kernel.org>, "Liang, Kan" <kan.liang@intel.com>
Subject: Re: Implement lbr-as-callgraph v10
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> > > I'm getting compile error for DEBUG=1
> 
> > looks like the BUILD_BUG_ON_MSG does not work correctly with -O6 we use
> 
> Yeah, I'll probably just take the brute force approach Andi originally
> used and switch to BUILD_BUG_ON_MSG once we get it working in the tools/
> environment, i.e. using -O6, etc.

For new enough gcc you could use _Static_assert()

-Andi