[RFC] Document intrinsic modules?

[Jerry DeLisle]

Walter Spector wrote:
> Tobias Burnus <burnus@net-b.de> wrote:
>> I was wondering if one should document the intrinsic modules, gfortran
>> ships with. Currently, we have: ISO_C_BINDING, ISO_FORTRAN_ENV, OMP_LIB
>> and OMP_LIB_KINDS.
> 
> At least mention they are available.  The first two in a list of F2003
> items supported, the latter are required by OpenMP.
> 
>> Expected are ISO_IEEE_* and ISO_VARYING_STRING;
> 
> Same here.  As F2003 features are available, folks should be made aware
> of them.
> 
>> maybe also some modules
>> in the spirit of the POSIX FORTRAN 77 language interfaces or of NAG's
>> unix* modules.
> 
> If gfortran eventually does support the POSIX interfaces, and I hope that
> it will, note that there was no standardized name for a F90 module.
> The POSIX 1003.9 committee only addressed Fortran-77 compatibility - a
> controversial aspect of their work.  But given that there were no working
> F90 compilers at the time the POSIX Standard was being worked on, it is
> somewhat understandable - if not especially forward-thinking.
> 
> Nonetheless, IRIX (and Cray) have had a F90 module called "PXF_DEFINITIONS"
> available for many years.  And now that the Intel compiler supports PXF,
> they implemented a F90 module called "IFPOSIX".  These modules only contain
> INTERFACE blocks.  But are extremely helpful when developing code.
> 

If we get a consensus from the team, I will be happy to implement the POSIX 
interfaces, or at least the ones needed most.  Consensus would be at least two 
other maintainers giving me a thumbs up.

Jerry