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Re: fortran .mod files

For instance, is it safe to assume that all *.mod files produced with,
say, gfortran from GCC 4.2.1 will (assuming in all cases an identical
set of compiler flags) be compatible with gfortran as shipped in GCC
4.2.2?

From what I remember, we have never formalized this. The current consensus, as I understand it, is that while there is no guarantee on compatibility, modules files are actually compatible within releases of the same branch (4.2 is a branch, 4.3 will be another one), unless of course there is a bug nasty enough to mandate fixing (a regression wrt to a previous release) that crept into module format. I don't think such a thing has occured for 4.2, but others may be more affirmative than me on this point (Paul or Tobias ?).

Hope this helps,
FX

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