libio won't build in current cvs

[Jeffrey A Law]

  In message < 199807140138.SAA20391@dm.cobaltmicro.com >you write:
  > 
  > It passes '-fvtable-thunks' and the compiler says this is an illegal
  > option.  This is on sparc-linux.  Is someone looking into this?
Weird.  Is this still happening?

-fvtable-thunks is a c++ option and should be recognized when building
C++ code.

jeff