From: pgarceau AT teleport DOT com (Paul Garceau)
Subject: Re: DirectX and mingw..
30 Apr 1998 05:29:51 -0700
Message-ID: <199804300105.SAA18319.cygnus.gnu-win32@radius1.teleport.com>
References: <199804282251 DOT PAA25147 AT mail1 DOT teleport DOT com>
Reply-To: pgarceau AT teleport DOT com
To: gnu-win32 AT cygnus DOT com

Greetings all,

On 29 Apr 98 at 18:18, the Illustrious Mumit Khan wrote:

> On Tue, 28 Apr 1998, Paul Garceau wrote:
> 
> > 	Ok...that's EGCS...not Mingw32-gcc.
> 
> They're both GCC! JJ's distribution happens to be based on FSF GCC-2.8.x,
> and mine on EGCS-1.0.x. Might seem like semantic nitpicking, but it's
> important not to muddle the issue.

	I agree.

> 
> FSF GCC and EGCS GCC are two different distributions of the "same"
> compiler. Please see http://egcs.cygnus.com/ for more info on how FSF and
> EGCS GCC distributions relate to each other.
> 
> > 	EGCS has recently been upgraded to handle the Mingw32-header based 
> > compiles, links, etc. as far as I know.  EGCS is also based on Cygwin32, 
> > a non-minimalist Gnu-Win32 development environment.
> 
> I'm not sure what the source of this piece of information is, but I've
> heard this from a few other times as well. EGCS is an alternative (to
> FSF) GCC distribution that combines the following in a single package:
> 
>    - Languages: C, C++, Objective C and F77 
>    - Libraries: Runtime libraries for all the front-ends
> 
> Cygwin32 is a runtime environment (sort of like a layered OS) for Win32.
> EGCS has been ported to Cygwin32 and a host of other (mostly Unix)
> environments.
> 
> EGCS has *nothing* to do with CYGWIN32, and the statement that EGCS is
> based on Cygwin32 really doesn't make any sense.

	I stand corrected...thank you.
 
> The Mingw port of EGCS was developed independent of cygwin32, but of
> course there is a lot in common between cygwin32, mingw and other Win32
> based ports.
> 
> To set the record straight:
> 
>   - What Paul is calling Mingw32-gcc is just FSF GCC 2.8.x + Mingw
>   headers 
>     and libraries. JJ bundles other development tools as well, such as
>     linker, assembler, etc.
> 
>   - EGCS 1.0.2 for mingw32 is EGCS GCC 1.0.2 + Mingw headers and
>     libraries. I (Mumit Khan) bundle other development tools as well,
>     such as linker, assembler, etc.
> 
> Now look at the difference between the two.
> 
> Of course, since both JJ and I release these at different times, there
> are certain differences in the Mingw headers/libraries, binutils (linker
> and assembler), but always merge in the changes eventually. For example,
> the egcs-1.0.2 distribution contains significantly modified Windows32api
> headers that enabled me to port Tcl/Tk/BLT/Tix etc to Mingw32 and these
> changes have not yet made it into JJ's distribution; the changes to Mingw
> headers is minimal (just a few lines), and inconsequential.
> 
> > 
> > 	The Cygwin32 gcc is different than the Mingw32-gcc.  EGCS gcc is
> > different than either Cygwin32-gcc or Mingw32-gcc; even though EGCS is
> > now capable of compiling both Cygwin32 based source (UWIN) and the
> > Mingw32 packages (non-UWIN).  UWIN == Unix-Windows.
> 
> These are "ports". EGCS is also capable of compiling for IRIX and so is
> Cygwin GCC and Mingw-gcc when you build them for that target.
> 
> > 	Ah, but this is where the confusion lies...since the different packages 
> > are using different compilers, than the outcome of a compile/link/build 
> > will vary from distribution to distribution when comparing EGCS, 
> > Mingw32-GCC/++ and Cygwin32.
> 
> Of course. These are different versions of the same compilers. EGCS has
> features that GCC will *eventually* have, and Cygwin GCC is a mixture of
> the two.

	Peace,

		Paul G.

Information Systems Consultant
NewDawn Productions
http://www.teleport.com/~pgarceau/newdawn/
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