make problem with cygwin

[Haberhausen, Dierk]

Hello,
I try to build rtems with cygwin on a windows XP system (No Virus Checker, /
mounted with -b option, sh shell, path set to
C:\Cygwin\bin;C:\Cygwin\usr\bin;C:\cygwin\opt\rtems-4.6\bin).
 
The configuration with "../rtems-4.6.1/configure --target=i386-rtems
--enable-rtemsbsp=pc386 --prefix=/opt/rtems-4.6" is done with no error.
 
But the make all finished with following error:
Makefile:567: ***multiple target pattern. Stop.
make[4]: Leaving directory '/rtems/tools/ib-rtems/i386-rtems/c/pc386/optman'
make[3]: *** [preinstall-recursive] Error 1
make[3]: Leaving directory '/rtems/tools/ib-rtems/i386-rtems/c/pc386'
make[2]: *** [pc386] Error 1
make[2]: Leaving directory '/rtems/tools/ib-rtems/i386-rtems/c'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/rtems/tools/ib-rtems/i386-rtems/c'
make: *** [all-recursive] Error 1
 
I have tried other targets and configuration options but it is always the
same error.
 
I try the same under Linux and it works with no errors. But that's not a
solution for me because I will work on windows. 
So if anyone can tell me what I do wrong it would be nice!
Best regards,
Dierk