https://cygwin.com/pipermail/cygwin/1999-February/018597.html
Fortran 90 on B20
fortran 90b20
https://www.nist.gov/publications/fortran-90-interface-opengl-revised-january-1998
A Fortran 90 Interface for OpenGL: Revised January 1998 | NIST
Nov 10, 2018 - It is important to provide a good fortran interface to OpenGL and related libraries for scientific visualization in mathematical software.
fortran 90january 1998interfaceopenglrevised
https://www.intel.com/content/www/us/en/docs/onemkl/developer-guide-windows/2025-2/comp-dependent-functions-and-fortran-90-modules.html
Compiler-dependent Functions and Fortran 90 Modules
fortran 90compilerdependentfunctionsmodules