*.f90 files vs. *.F90 files

[dmitry-ganyushin]

I am wondering if there is any special reason that we have both *.f90 and *.F90 files fortrran files in the repo?

[pnorbert]

We need .F90 if the file contains C style macros and headers (i.e. # character). The capital letter is commonly understood by Fortran compilers to call the pre-processor on them before compiling.

[eisenhauer]

For future reference, stackoverflow is a great place to learn this kind of thing.

[eisenhauer]

Close this as answered.