[OpenBIOS] trouble with cygwin

[Mark Wenning]

Hi guys, I'm trying to build OpenBIOS under Cygwin .  I get the 
following errors when I build it:

wenning@SHARPSTICK:~/src/openbios/openbios$ make
+ Entering libc
+ Entering kernel
+ Entering toke
+ Entering forth
+ Entering modules
+ Entering drivers
+ Entering fs
+ Entering grubfs
+ Entering arch/x86
BUILDING plain.image
ld: PE operations on non PE file.
make[1]: *** [plain.image] Error 1
make: *** [sub-arch/x86-all] Error 2

any ideas?