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Date: Wed, 21 Nov 2012 19:50:58 +0200
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: Where to go with Win7-X64
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> From: Dirk Zabel <zabel AT riccius-sohn DOT eu>
> Date: Wed, 21 Nov 2012 10:09:23 +0100
> 
> Now I am changing to a Win 7-X64 bit machine, and I see my old 
> djgpp-compiled exe-files don't run any more.
> Has anyone an idea on how to proceed? I know there are cygwin and mingw, 
> but I don't have experiences with any of them. As far as I can say from 
> the mingw homepage, bison and flex are not included. So any good advice 
> on how to get a running gcc+bison+flex environment for Win 7-X64 would 
> be very welcome.

I use MinGW, FWIW.  It's a 32-bit environment, but runs well on a
64-bit Windows 7 as well.  You can find Flex and Bison in the GnuWin32
collection at http://gnuwin32.sourceforge.net/packages.html.

There's also MinGW64, a separate project.  It provides 64-bit
executables.  I don't have any experience with it yet.