3.0.1 & Solaris 8

[Bruce Korb]

I was looking at GCC on Solaris, when I just noticed something.
gcc -mcpu=v9 causes __sparc_v9__ to be defined, but not __sparcv9.
I'm sure somewhere in the archives this must have been discussed,
but it is clearly wrong.  _all_ the system headers depend upon
__sparcv9 being defined for 64 bit land.  Maybe it isn't ready for
prime time yet, but then I would think you would just suppress the
"-mcpu=v9" thing instead of the define.  It seems to me we should
add __sparcv9 to the specs for Solaris8, or drop the mcpu.