Messages are:
GSFFCallInvocation.m: In function `GSInvocationCallback':
GSFFCallInvocation.m:1003: error: union has no member named `_longlong'
GSFFCallInvocation.m:1004: error: union has no member named
`_ulonglong'
GSFFCallInvocation.m:1003: warning: value computed is not used
GSFFCallInvocation.m:1004: warning: value computed is not used
make[2]: *** [shared_obj/GSFFCallInvocation.o] Error 1
make[1]: *** [libgnustep-base.all.library.variables] Error 2
make[1]: Leaving directory
`/cygdrive/c/cygwin/proyectos/gnustep/libraries/gnustep-startup
-0.15.0/build/gnustep-base-1.12.0/Source'
make: *** [internal-all] Error 2