It also compiled straightforwardly with my gfortran [gcc version 8.3.0 (Debian 8.3.0-6)] but producing a .o of 5MB.
I agree that it is not the modernized way of developing a library we’re looking for, but I guess it’s good to see previous attempts to organize the messy wold of Fortran (Open Source) libraries. Also to remind us the importance of this project and find a way out to standardize a mathematical library.
I guess a good starting point is to discuss what this mathematical library should contain and which is the correct approach to define the calls to the routines. This can easily be taken from other libraries out there. Some of you commented that Julia and C++ (if I remember correctly) has this properly done. One can also follow the GSL documentation https://www.gnu.org/software/gsl/doc/html/index.html which I find clear, neat and complete. The thing that I don’t like about the GSL is the calls to the routines and I hope this can be better done in the stdlib.