CheckFortranFunctionExists

Check if a Fortran function exists.

CHECK_FORTRAN_FUNCTION_EXISTS
CHECK_FORTRAN_FUNCTION_EXISTS(<function> <result>)

where

<function>
the name of the Fortran function
<result>
variable to store the result; will be created as an internal cache variable.

The following variables may be set before calling this macro to modify the way the check is run:

CMAKE_REQUIRED_LINK_OPTIONS
A ;-list of options to add to the link command (see try_compile() for further details).
CMAKE_REQUIRED_LIBRARIES
A ;-list of libraries to add to the link command. These can be the name of system libraries or they can be Imported Targets (see try_compile() for further details).