linux-kernel - Re: [PATCH] unifdef: update to upstream revision 1.189

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Message-ID: <20091127181749.GA16177@merkur.ravnborg.org>
Date:	Fri, 27 Nov 2009 19:17:49 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Tony Finch <dot@...at.at>
Cc:	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Joe Perches <joe@...ches.com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	"Justin P. Mattock" <justinmattock@...il.com>
Subject: Re: [PATCH] unifdef: update to upstream revision 1.189

Hi Tony.

On Fri, Nov 27, 2009 at 03:50:30PM +0000, Tony Finch wrote:
> Fix handling of input files (e.g. with no newline at EOF) that could
> make unifdef get into an unexpected state and call abort().
> 
> The new -B option compresses blank lines around a deleted section
> so that blank lines around "paragraphs" of code don't get doubled.
> 
> The evaluator can now handle macros with arguments, and unbracketed
> arguments to the "defined" operator.

Can you confirm that this does not regress with respect to the changes
that Russell King implemented in the commit:
eedc9d83eaab2d35fb9dd1ec25b765dec964e26c
("kbuild: fix headers_exports with boolean expression")


I long time ago started a small project to do a dedicated
implementation of unifdef solely for use by the kernel.
Today we do some preprocessing in perl - and then
we pass the result to unifdef file by file.
A dedicated program could do this much faster -
and this would be a bigger incentive for the kernel supplied
tools to actually use the exported headers.

But I never got far with it and I think the code was
lost when I changed computer some time ago.

	Sam
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