linux-kernel - Re: [-mm patch] make types.h usable for non-gcc C parsers

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Message-ID: <20070828175904.GS26410@stusta.de>
Date:	Tue, 28 Aug 2007 19:59:04 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Gabriel C <nix.or.die@...glemail.com>,
	linux-kernel@...r.kernel.org, Olaf Hering <olh@...e.de>,
	netdev@...r.kernel.org
Subject: Re: [-mm patch] make types.h usable for non-gcc C parsers

On Tue, Aug 28, 2007 at 07:06:04PM +0200, Sam Ravnborg wrote:
> > 
> > It fixes a bug exposed by a -mm only patch, not by the net tree
> > (and 2.6.23-rc3-mm1 doesn't contain the net tree at all).
> > 
> > > But I'd like a better description, please.  Which "non-gcc parser" are we
> > > talking about here?  Something under ./scripts/.  Well, please identify it,
> > > and describe what the problem is, and how the proposed patch will address
> > > it.
> > >...
> > 
> > It's about parsers like the Sun C compiler and the C parser shipped 
> > with genksyms.
> 
> So it is about two bugs.
> 1) kbuild (genksyms) fails to generate CRC for some symbols
> 2) allow userspace to parse the header
> 
> As for 2 we already use sed to remove a lot of stuff in our headers
> so why do we use another approach here?

This time it's the other way round:

We need __extension__ only in userspace.

> As for 1 I will try to teach genksyms to accept __extension__ but
> it seems leess trivial than I expected (most be fooling myself somehow).

We anyway need a way to hide __extension__ from non-gcc userspace C 
compilers, and it can be hidden from genksyms the same way.

> 	Sam

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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