[Patch, fortran] PR24398 - broken module files

[Paul Thomas]

FX,

>
> Here's something I've wanted to ask your for some time, and now is the 
> perfect occasion: do you think it would be good for us to include a 
> "version number" in the module files generated by gfortran, so that 
> when incompatible changes are made to the module file format, this 
> number can be bumped and gfortran can error out and ask the user to 
> regenerate the module file?
>
> Thanks, and sorry if that's a stupid question,

If so, we are both in the same boat because I wondered the same thing, 
when thinking about the check that the file being read is indeed a 
module file. :-)

As it happens, I have not yet applied the patch because I am doing 
house-husband duty and our daughter is unwell. A version number could 
easily be added. I wonder what should trigger the number changes? 
Changes to .mod files themselves, which would be my choice, or to the 
library or the gcc version number? Since I could not see a reasonable 
scheme, I did nothing.

Regards

Paul