Changes

If you modify a Fortran file, you should stay within Fortran 77 with

If you modify a Fortran file, you should stay within Fortran 77 with

common extensions like {{codeline|END DO}}.  Currently, we want all sources to

common extensions like {{codeline|END DO}}.  Currently, we want ensure that

be compilable with the f2c and g77 compilers, without special flags if

it is possible to compile all sources with the gfortran compiler, without

possible.  This usually means that non-legacy compilers also accept the

special flags if possible.  This usually means that non-legacy compilers

sources.

also accept the sources.

=== M4 guide ===

=== M4 guide ===