WARNING:
rtems/gcc (implicitely) uses -maltivec on all 74xx CPUS and
the MVME5500 calls for -mcpu=7450.
Unfortunately, with -maltivec, gcc uses vector registers for
some optimizations.
--> until proper altivec support is implemented in RTEMS random
*data corruption* must be expected.
Workaround:
make/custom/mvme5500: use -mcpu=750
-- Till