[Bug fortran/42607] add information about how to compile a module

[gwhowell at ncsu dot edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42607

Gary Howell <gwhowell at ncsu dot edu> changed:

           What    |Removed                     |Added
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                 CC|                            |gwhowell at ncsu dot edu

--- Comment #14 from Gary Howell <gwhowell at ncsu dot edu> ---
A downside to having no documentation for .mod files .. 

cmake suppresses the output from make (get % completed) 

gfortran acts on 
.f90 files to produce .o files .. and when needed also the .mod file
but one .o file fails to produce a .mod file  

and cmake then fails because it can't find the .mod file

suspect this is not a problem with gfortran (likely the preprocessor
failed) but IMHO words in the documentation about when gfortran produces
a .mod file would help in debugging. 

Regards, 
Gary Howell