[Bug fortran/72798] Module (.mod) file changes even when interface does not

[mikael at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72798

Mikael Morin <mikael at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikael at gcc dot gnu.org

--- Comment #1 from Mikael Morin <mikael at gcc dot gnu.org> ---
The difference comes from the (internal) implicit pure attribute.
Without the print, the subroutine gets the pure attribute, so that its usage
may be more aggressively optimized (Honestly, on a small test I made, there was
actually no difference).