CheckLibraryExists

Check if the function exists.

CHECK_LIBRARY_EXISTS

CHECK_LIBRARY_EXISTS(LIBRARY FUNCTION LOCATION VARIABLE)

LIBRARY  - the name of the library you are looking for
FUNCTION - the name of the function
LOCATION - location where the library should be found
VARIABLE - 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_FLAGS

string of compile command line flags.

CMAKE_REQUIRED_DEFINITIONS

list of macros to define (-DFOO=bar).

CMAKE_REQUIRED_LINK_OPTIONS

New in version 3.14: list of options to pass to link command.

CMAKE_REQUIRED_LIBRARIES

list of libraries to link.

CMAKE_REQUIRED_QUIET

New in version 3.1: execute quietly without messages.