I have made a test in MSYS2 with a fpm project depending on gtk-fortran and PLplot and had the same errors as you with the single quotes. It was better with double quotes, but finally the compilation ...
gtk-fortran est une bibliothèque permettant de créer des interfaces graphiques GTK en Fortran moderne, ainsi que d’accéder à la bibliothèque généraliste GLib sur laquelle est basée GTK. La dernière ...
Describe the bug CMake detects PLplot modules, but the compilation fails: -- Checking for module 'plplot-fortran' -- Found plplot-fortran, version 5.15.0 -- Checking for module 'plplot' -- Found pl ...