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.
Note
This command does not detect functions in Fortran modules. In general it is recommended to use CheckSourceCompiles instead to determine if a Fortran function or subroutine is available.
The following variables may be set before calling this macro to modify the way the check is run:
CMAKE_REQUIRED_LINK_OPTIONS Added in version 3.14.
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).
CMAKE_REQUIRED_LINK_DIRECTORIES Added in version 3.31.
A ;-list of libraries search paths to pass to the linker (see try_compile() for further details).
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https://cmake.org/cmake/help/latest/module/CheckFortranFunctionExists.html