g77 large array

[Robert Dewar]

> In this case, two arrays do not need memory at the same time.
> Cannot SUBROUTINE B use the same memory area as A in Fortran compiler,
> even if I do not declare explicitly COMMON I?
> I should write about the machine.

Usually convention in Fortran is to allocate all storage statically. So indeed
one would not expect these two arrays to overlap. I am not sure about the current
Fortran standard, but earlier Fortran standards certainly *allowed* stack allocation
of such arrays, but in practice, static allocation (also certainly allowed) was
so standard, that all compilers do static allocation.

So what you are seeing makes perfect sense