g77 options via Linux compatible with Windows based Compaq Visual Fortran(90) compiler

[Paul Brook]

> In Linux, I am attempting to compile this same program using the
> following g77 command and options:
>
> g77 -ff90 -ffree-form -fcase-preserve apm_mod.for

g77 does not support fortran 90. It only recognises a very small subset of f90 
features. For fortran 90 code you need to use the new Fortran 95 forntent 
(gfortran) included with gcc4

Paul