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

Matthew J Fletcher mfletcher at
Wed Mar 21 13:26:38 UTC 2001

> 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'

It looks like your 'as' does not support m68k cpu targets, i would suggest
you rebuild it from the sources. Makeing sure you dont exclude any cpu

When you have done this you should get the following options.

-m68000 | -m68008 | -m68010 | -m68020 | -m68030 | -m68040 | -m68060
| -m68302 | -m68331 | -m68332 | -m68333 | -m68340 | -mcpu32 | -m5200

by default 'as' will asume an m68020 cpu without a fpu.

Matthew J Fletcher
NPD Firmware

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