Error when building with CYGWIN on win32

[Gregory John Casamento]

 Compiling file NSTimeZone.m ...
NSTimeZone.m: In function `-[GSAbsTimeZone timeZoneDetailTimeZone]':
NSTimeZone.m:752: warning: `NSTimeZone' may not respond to `+arrayWithObject:'
NSTimeZone.m:752: warning: (Messages without a matching method signature
NSTimeZone.m:752: warning: will be assumed to return `id' and accept
NSTimeZone.m:752: warning: `...' as arguments.)
NSTimeZone.m: In function `-[GSTimeZone initWithName:data:]':
NSTimeZone.m:2219: error: invalid application of `sizeof' to incomplete type
`tz
head'
NSTimeZone.m:2225: error: invalid application of `sizeof' to incomplete type
`tz
head'
NSTimeZone.m:2233: error: dereferencing pointer to incomplete type
NSTimeZone.m:2234: error: dereferencing pointer to incomplete type
NSTimeZone.m:2235: error: dereferencing pointer to incomplete type
make[2]: *** [shared_obj/NSTimeZone.o] Error 1
make[1]: *** [libgnustep-base.all.library.variables] Error 2
make[1]: Leaving directory `/cygdrive/d/Development/gnustep/core/base/Source'
make: *** [internal-all] Error 2
address@hidden base]$ make install
Making all in Source...

=====
Gregory John Casamento 
-- CEO/President Open Logic Corp. (A Maryland Corporation)
#### Maintainer of Gorm for GNUstep.