On Thu, Feb 28, 2019 at 10:12:00PM +0100, Thomas Schwinge wrote:
> On Wed, 15 Jun 2016 20:12:15 -0700, Cesar Philippidis
> <ce...@codesourcery.com> wrote:
> The code changes now are actually very simple. The "problem" is that
> we're incrementing the Fortran module version, 'MOD_VERSION', which
> breaks binary compatibility with Fortran module files created with
> earlier versions of GCC, which is something that is to be avoided, as
> I've heard. Or, is it not that bad actually?
It is bad and we certainly shouldn't change it on release branches.
There are many ways to deal with it without bumping MOD_VERSION in a
backwards but not forwards compatible way, so that a newer compiler will be
able to parse old *.mod files, and newer compiler new ones as long as this
problematic stuff doesn't appear in.
Jakub
