[CMake] Using preprocessor to set module name with Fortran in CMake

[Tom Clune]

I would like to have create a poor-man's template module in Fortran by using the preprocessor and #include.   The generic logic will go in the include file, and the various top-level files will define tokens to instantiate specific implementations.   A very simple example is the following:

!----------------------
! <IntegerVersion.F90>
#define _TYPE integer
#define MODULE_NAME Integer_mod
#include <generic.h>
!----------------------

!----------------------
! <generic.h>
module MODULE_NAME
    _TYPE :: i
…
end module MODULE_NAME
!----------------------

The problem is that CMake does not realize that module has been renamed via the preprocessor and still tries to find a .mod file called MODULE_NAME.mod:   "Error copying Fortran module module_name" …

How can I notify CMake that the module has a different name than what it finds in the source code?   I have tried using set_property() on the top file, but that does not seem to help. 

I am aware that with the simple example above, I could move the module declaration up to the top level and circumvent this problem.  But the include file is itself being automatically generated.

Thanks.






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