Dear Aidyn, Sorry I have been quite distracted sorting out the end of the year and an international conference. I am not sure if anyone else has already responded to this request. The best suggestion I can come up with is to look at the file cmake/ThirdPartyArpack.cmake since this is a fortran package we compile into the code. Cheers, Spencer. On 19 Jun 2018, at 20:35, Aidyn Aitzhan <aidyn.b.aitzhan@gmail.com<mailto:aidyn.b.aitzhan@gmail.com>> wrote: Hi all, I am planning to call an external Fortran module in the compressible flow solver of Nektar++ 4.4.1. Could you please guide me about how I should modify the make (CMakeLists.txt) files? Basically, I have Fortran subroutines that allow me to compute temperature for non-constant heat capacities, so I want to use them. Thanks in advance, Aidyn _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users Spencer Sherwin FREng, FRAeS Head, Aerodynamics, Director of Research Computing Service, Professor of Computational Fluid Mechanics, Department of Aeronautics, s.sherwin@imperial.ac.uk<mailto:s.sherwin@imperial.ac.uk> South Kensington Campus, Phone: +44 (0)20 7594 5052 Imperial College London, Fax: +44 (0)20 7594 1974 London, SW7 2AZ, UK http://www.imperial.ac.uk/people/s.sherwin/