[Gm2] GM2 and Cygwin

[Christoph Schlegel]

Hi Gaius!

Some information for the Windows-people.

I just reinstalled an updated Cygwin environment and tried to build gm2 
(I think it would be a good idea to mention the required packages in the 
docs - especially unexpected ones like python, dejagnu and some other 
more expected ones like make, flex and autoconf; these are not installed 
by default).

I tried to build gm2 using gcc 4.3.4 and got the following error:

Compiling /gm2-cvs-latest/libiberty/strsignal.c:409: error: conflicting 
types for 'strsignal'
/usr/include/string.h:91: error previous declaration of 'strsignal' was here

I am not sure this one hasn't been reported already but I found the 
following message:

http://cygwin.com/ml/cygwin/2008-06/msg00368.html

and an answer explaining the problem:

http://cygwin.com/ml/cygwin/2008-06/msg00369.html

Eric Blake mentions a patch for this in the second message but it 
obviously didn't find its way into the latest Cygwin release.

The first message documents a dirty "hack" by commenting out strsignal 
in string.h - well, I will try that and let you know if it works for now.

So this is not a gm2-error but I just wanted to inform people that 
Cygwin still doesn't work - but I saw the gm2-compiler build without 
problems...

Regards

Christoph