migrating code from f77 to f90

[Jack Howarth]

Tobi,
   Well actually what I am trying to do is more of a variation on
something like -std=f90 (which doesn't exist). What I was trying to
find was all the deviations from Fortran 90 that would could be
corrected while still allowing the code to be compiled as Fortran 77
code. That is I was looking to clean up the code as much as possible
in advance of porting it to Fortran 90. For example, the xplor-nih
code is riddled with tabs. The standards flags in XL Fortran will
report that sort of thing.
            Jack