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Subject: Re: [PATCH] Speed up "make headers_*"
From: David Woodhouse <dwmw2@infradead.org>
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Date: Sun, 08 Jun 2008 11:49:01 +0100
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To: Sam Ravnborg <sam@ravnborg.org>
Cc: Vegard Nossum <vegard.nossum@gmail.com>, linux-kbuild <linux-kbuild@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, Linus Torvalds <torvalds@linux-foundation.org>, Jan Engelhardt <jengelh@computergmbh.de>

On Sun, 2008-06-08 at 12:41 +0200, Sam Ravnborg wrote:
> headers_install.pl looks like this now.
> I am not happy about the way I call unifdef - can it be
> done better?

Possibly. unifdef only actually handles "#ifdef __KERNEL__" and
"#ifndef __KERNEL__", doesn't it? It shouldn't be too hard to recreate
at least that much functionality in perl, surely?

Bonus points for making it handle more interesting constructs like
"#if defined (KERNEL) || defined (FOO)", and for warning/erroring
whenever any ifdefs on CONFIG_xxx would be visible in userspace.
But those can come later; we don't have those yet anyway.

-- 
dwmw2