linux-kernel - Re: More effective processing (Re: [PATCH 25/33] kbuild: use POSIX BRE in headers install target)

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Date:	Sun, 22 Jul 2007 00:13:26 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Oleg Verych <olecom@...wer.upol.cz>
Cc:	Mike Frysinger <vapier.adi@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	kbuild-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: More effective processing (Re: [PATCH 25/33] kbuild: use POSIX BRE in headers install target)

On Sun, Jul 22, 2007 at 12:16:27AM +0200, Oleg Verych wrote:
> 
> What do you think about this one? I want to propose to remove
> scripts/unifdef.c but to make clear policy about how to mark __KERNEL__
> sections in header files. We know how obfuscated C can be, and this also
> applies to preprocessing. There's known CodingStyle about some points.
> The thing is to specify rules, that will be easy for `sed` to do cleaup
> job.
> 
> ./linux/soundcard.h:#if (!defined(__KERNEL__) && !defined(KERNEL) && !defined(INKERNEL)
>                       && !defined(_KERNEL)) || defined(USE_SEQ_MACROS)
> ./linux/stat.h:#if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
> 
> Split __KERNEL__ check, make only positive, i.e.
> 
> #if defined(__KERNEL__)
> #ifdef __KERNEL__
> 
> ./linux/stat.h:#ifdef __KERNEL__
> 
> No `#else` and ending part to contain comment:
> 
> ./linux/smb_fs_sb.h:#endif /* __KERNEL__ */
> 
> Simple enough:
> 
> sed '/^#if[^_]*__KERNEL__/,/^#end[^_]*__KERNEL__/d'

What are you trying to say with the above?
Sorry but I lost track of part of the discussion but you seems to havea point here?

	Sam
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