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From: Marcus Metzler <mocm@metzlerbros.de>
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Date: Wed, 25 Jun 2003 22:09:31 +0200 (CEST)
To: =?ISO-8859-1?Q?J=F6rn?= Engel <joern@wohnheim.fh-wedel.de>
Cc: Marcus Metzler <mocm@metzlerbros.de>,
       Christoph Hellwig <hch@infradead.org>, mocm@mocm.de,
       Michael Hunold <hunold@convergence.de>, Sam Ravnborg <sam@ravnborg.org>,
       linux-kernel@vger.kernel.org
Subject: Re: DVB Include files
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=?iso-8859-1?Q?J=F6rn?= Engel writes:
 > On Wed, 25 June 2003 20:43:23 +0200, Marcus Metzler wrote:
 > > Christoph Hellwig writes:
 > >  > On Wed, Jun 25, 2003 at 08:09:51PM +0200, Marcus Metzler wrote:
 > >  > >  > If the structures change incompatibly you're fucked anyway.  Better
 > >  > > 
 > >  > > Not necessarily, e.g. changing
 > >  > > 
 > >  > > #define AUDIO_SET_ATTRIBUTES       _IOW('o', 17, audio_attributes_t)
 > >  > > #define AUDIO_SET_KARAOKE          _IOW('o', 18, audio_karaoke_t)
 > >  > > 
 > >  > > to 
 > >  > > 
 > >  > > #define AUDIO_SET_ATTRIBUTES       _IOW('o', 47, audio_attributes_t)
 > >  > > #define AUDIO_SET_KARAOKE          _IOW('o', 48, audio_karaoke_t)
 > >  > > 
 > >  > > or
 > >  > 
 > >  > In that case yes, you are screwed.  Your ABI just changed incompatibly.
 > > 
 > > Not if you recompile.
 > 
 > Isn't the point of an application _binary_ interface, that you don't
 > have to recompile?

You don't need headers for binaries either, so what's your point.

Marcus

-- 
/--------------------------------------------------------------------\
| Dr. Marcus O.C. Metzler        |                                   |
|--------------------------------|-----------------------------------|
| mocm@metzlerbros.de            | http://www.metzlerbros.de/        |
\--------------------------------------------------------------------/