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Date:      Wed, 04 Dec 2002 15:51:20 -0800
From:      Peter Wemm <peter@wemm.org>
To:        Andrew Gallatin <gallatin@cs.duke.edu>, "alex" <lex@adelaide.on.net>, "Yoriaki FUJIMORI" <fujimori@ns.fujimori.cache.waseda.ac.jp>, alpha@FreeBSD.ORG
Subject:   Re: link_elf: symbol osf1_wait4 undefined 
Message-ID:  <20021204235120.9E1672A7EA@canning.wemm.org>
In-Reply-To: <20021204234429.1E7DE2A8A5@canning.wemm.org> 

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Peter Wemm wrote:
> Andrew Gallatin wrote:
> > 
> > alex writes:
> >  > ahhhh. That solved the problem. 
> >  > What is the technical reason for having to load the osf1 module first ?
> > 
> > Linux/alpha uses the same ABI as OSF/1 for a number of functions,
> > since they bootstrapped themselves from OSF/1 on alpha and never
> > bothered to go fully native.  This ABI is already provided by our
> > osf1.ko module.
> > 
> > The problem is that the osf1.ko module is SUPPOSED to be automatically
> > loaded as a dependancy of the linux module.  I've asked the person who
> > wrote the module dependancy code for help on this, but he's moved on
> > to other things and has never answered.  If somebody wants to look
> > into this, that would be great.  I've never been able to figure it
> > out.
> 
> This is quite well solved in 5.0:
...

> 
> There is no good solution for 4.x because the dependency system runs at
> the file level (rather than module level) and cannot detect when a module
> is already in the kernel.

I've just realized that the 4.x tree has also had the MODULE_VERSION and
MODULE_DEPEND stuff MFC'ed.  The problem is that they are just
stubs in RELENG_4.  Maybe this is the source of confusion - those lines
do absolutely nothing on 4.x.

Cheers,
-Peter
--
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5


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