IMPORTANT: Usage of __FILE__ macro

[arango]

This update modifies the usage of C-preprocessing macro __FILE__, which expands to the name of the current input file being processed. It is an extensive and simple change to ROMS that facilitates the compiling with Cmake in the future.

Now, we define the local variable MyFile as:

     character (len=*), parameter :: MyFile =                          &
    &  __FILE__

So the current filename can expand beyond the 72 columns and compiled free-form compiler flags to avoid syntax errors. It cleans the code substantially.

Usually, MyFile is used in statements like:

     IF (FoundError(exit_flag, NoError, __LINE__, MyFile)) RETURN

     CALL wclock_on (ng, iNLM, 35, __LINE__, MyFile)

     CALL wclock_off (ng, iNLM, 35, __LINE__, MyFile)

These changes are part of several sequential updates to facilitate ROMS interface with Joint Effort for Data Assimilation Integration ​(JEDI) project.