Win-GHC with GnuWin32 toolset--Mingw32 replacement

Part of the problem when attempting to use MS tools to build GHC is  
the difference between Mingw32 library names (lib*.a, .so), which CL,  
LIB, etc. do not recognise.  The other part of the problem is the  
Mingw toolset, notably AutoConf, AutoMake and Make, which do not  
understand CL.

I discovered a possible replacement for these (all running under  
DOS), in the GnuWin32 toolset, at http://gnuwin32.sourceforge.net .   
The GnuWin32 tools are all Windows-native packaged as DLLs and also  
include some more pervasive tools we were going to replace, such as  
Readline (v5.0) and build tools, including Sed.  With Windows-native  
versions of Perl and Python, we may be able to build without relying  
on any Mingw/Cygwin tools at all.

I am going to test a GnuWin32 build but wondered if you, or anyone  
else on this list, has worked with GnuWin32 before and might know if  
there are any problems with these packages?

Cheers,
Pete