# 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).