GCC configure. But there are long-standing bugs in the GCC sources and workarounds/fixes are required.
Since you seem to have an understanding of the problems here, perhaps you could file some bugzilla bug reports to document them.
then not... As told the "eabi" is not and one must use a wacky command like : powerpc-eabi-gcc -mads -O2 -o hello_ppc-eabi.x hello.c powerpc-eabi-gcc -myellowknife -O2 -o hello_ppc-eabi.x hello.c
I'd recommend the -msim option here. It is probably easier to get working on the simulator first, before trying to use hardware.
--
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com