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Date:	Sat, 25 Aug 2001 19:06:24 -0400
From:	Charles Wilson <cwilson AT ece DOT gatech DOT edu>
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To:	"David A. Cobb" <superbiskit AT home DOT com>
CC:	Cygwin General MailList <cygwin AT cygwin DOT com>
Subject:	Re: Re-loading DLL's (and the like)
References:	<5 DOT 1 DOT 0 DOT 14 DOT 0 DOT 20010825142958 DOT 05300070 AT mail>

David A. Cobb wrote:

> Not long ago there was a lot of discussion here about not being able to 
> do various things during setup (and maybe at other times) because in 
> Windoze one cannot rename of otherwise mess about with an open file - 
> it's otherwise in *Nix, I gather.
> 
> During my recent adventures building Xemacs-21.5/i686-pc-cygwin, I found 
> that the make install had done something that appears to be permitted 
> and which I've seen as an example on the gcc list which is very 
> *Nix-centric.
> 
> If Setup creates Cygwin1-1-3-3.dll and then does the equivalent of "ln 
> -fs /usr/bin/Cygwin1-1-3-3.dll /usr/bin/Cygwin1.dll" the link should be 
> removable/replaceable at run time because the link-file itself isn't 
> left open.
> 
> Of course /running/ anything using the new dll without closing all 
> instances of the old is pretty problematic.


Unfortunately, the MSWindows run-time loader can't use cygwin symbolic 
links to resolve dependencies.

Another beautiful theory slain by an ugly fact.  :-)

--Chuck



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