I am editing an old project that uses fixed form Fortran and compiling with IVF compiler. The current issue I have is with continu
Or use the compiler switch -free with .for or .f
Or use the compiler switch -fixed -132 with a .F90 .
In your case I would preserve the .f and cp that to .F90 and then explicitly have the makefile compile the .F90 ...
I normally use -fixed -132 with a .F90 as I often have -d-lines that I retain in the code, and I could not get -d-lines. To work with -free.