fpu vs soft-fpu

[Roland McGrath]

> I am puzzled how this is supposed to work. 

It's not working.

> If you have a math/Makefile with libm-support set to source files that
> exist in both sysdeps/powerpc/soft-fp and sysdeps/powerpc/fpu...and both
> of those directories exist in config.make on config-sysdirs who wins? 

The first in the list, of course.  The reason the situation is broken is
the order of the list, but it is hairy to fix and depends on what is wanted.