How to find a subroutine is belonged to which module?

[MSdueon12]

hello,
I am quite confused how to know a subroutine belongs to which module. For example, in dir /WRF/dyn_em/solve_em, there is a subroutine called SUBROUTINE solve_em, but how can I know this subroutine belongs to which module? thank you for any explanation.

 

[Ming Chen]

Probably you can try the command (suppose you at at top WRF directory)
grep -iw "subroutine name" */*.F

Most of the physics and dynamics subroutines are located at dyn_em and phys