make cross -> as: unrecognized option `-mc68020'

[Chris Stich]

Hi,
I'm a newbie to cygwin and rtems too, so I am building the cross
development envirinment and I have a problem:

by building the crosscompiler with cygwin "make cross" as desribed in
the Getting Started doc chapter A.2.4. I got this error:
as: unrecognized option `-mc68020'
make[1]: *** [libgcc1-asm.a] Error 1
make[1]: Leaving directory `/build/gcc/gcc'
make: *** [all-gcc] Error 2

Did I forget something?

Kind regards, Chris