GNUstep on cygwin

[Vincent Richomme]

Unfortunately gdb debugger doesn't work very well with objective-C on
mingw platform
so  I think it would be better if I first try cairo on cygwin.

Here is the results of my investigations :

http://cygwin.com/ml/cygwin/2010-03/msg00585.html
http://cygwin.com/ml/cygwin/2010-03/msg00586.html

As you can see there I had to make some modifications to compile it:

- comment #include <GNUstepBase/GSCategories.h> because it doesnt' exist
- remove specific cygwin code in NSBitmapImageRep+JPEG.m
- manually add to the command line the -lXmu switch

And now I have :

Creating libgnustep-back-017.bundle/Resources/Info-gnustep.plist...
plmerge: Uncaught exception NSRangeException, reason: in
substringFromRange:, range { 0, 2 } extends beyond size (1)
make[3]: *** [libgnustep-back-017.bundle/Resources/Info-gnustep.plist]
Error 1
make[3]: *** Deleting file
`libgnustep-back-017.bundle/Resources/Info-gnustep.plist'
make[2]: *** [libgnustep-back-017.all.bundle.variables] Error 2