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Message-ID: <3D2A28AE.1040002@ece.gatech.edu>
Date: Mon, 08 Jul 2002 20:05:02 -0400
From: Charles Wilson <cwilson AT ece DOT gatech DOT edu>
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To: cygwin AT cygwin DOT com
Subject: Re: Concurrent versions of cygwin1.dll on one system
References: <20020708173949 DOT L97906-100000 AT localhost> <20020708233457 DOT GB24240 AT redhat DOT com>
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Christopher Faylor wrote:

> 
> So, you should check for the existence of a cygwin1.dll.  If one exists
> and it is older than the one you're installing, replace it.  Otherwise,
> don't install cygwin1.dll.
> 
> You're asking for trouble otherwise.


Or, you can completely fork cygwin, and change:
   1) the dll name
   2) the shared memory name
   3) the registry key locations
   4) <catchall for whatever I forgot>

And roll your own "IvoWin".  (Remember, tho, cygwin is GPL; therefore 
IvoWin will be GPL and you must make the source code available to 
whomever you give the binary.  Ditto for your app - but that's already 
true for your app, since it currently links to cygwin itself)

Using cygwin's gcc to build your app might be tricky; if you use 
cygwin's gcc, then you'd need to build your app using something like:
   gcc -nostdlib a.o b.o c.o -livowin -luser32 -l......
It gets tricky.

Earnie Boyd did this several months ago, for use with mingw (the MSYS 
project).  Of course, his mods were quite a bit more drastic than 1-4 above.

--Chuck



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