# 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.

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).