Hi Gary,

The equally quick answer is that I don't know.
https://help.imsl.com/fortran/ indicates that the library is compiled with
Intel fortran. While there are fortran 77 interfaces for most (all?) of the
routines, all the examples show use of modules that will have been compiled
with Intel. I suggest that you ask the supplier of IMSL.

This list is dedicated to the development of gfortran. You might obtain a
more useful answer from one of the other lists supporting fortran usage in
general.

Good luck

Paul


On Tue, 6 Dec 2022 at 17:56, Gary Melnick via Fortran <fortran@gcc.gnu.org>
wrote:

> Hi,
>
> I'm wondering if I migrate to GNU gfortran whether I can use my Perforce
> International Mathematics and Statistics Library (IMSL) Fortran software
> in conjunction with gfortran 77 on my 2012 MacPro?
>
> Thank you in advance for your help.
>
> Regards,
> Gary
>


-- 
"If you can't explain it simply, you don't understand it well enough" -
Albert Einstein