WARNING for HP-UX 9.0 compilers:

3dio/redbil
3dio/redbsq
3dio/redbip
fcn43-47/fft.o

The +O3 +OP4 optimizer flags in FFLAGS seems to optimize away parts
of the routines and they don't work right.  The solution is to
change the optimizer flag to -O and compile these modules.

