cmake find_package_handle_standard_args(REASON_FAILURE_MESSAGE) examples

projectchrono/chrono cmake/FindOptiX.cmake :72 

find_package_handle_standard_args(OptiX
    FOUND_VAR OptiX_FOUND
    VERSION_VAR OPTIX_VERSION
    REQUIRED_VARS
        OptiX_ROOT_DIR
    REASON_FAILURE_MESSAGE
        "OptiX installation not found. Please use CMAKE_PREFIX_PATH or OptiX_INSTALL_DIR to locate 'include/optix.h'."
)

projectchrono/chrono cmake/FindPackageHandleStandardArgs.cmake :27 

find_package_handle_standard_args(<PackageName>
  [FOUND_VAR <result-var>]
  [REQUIRED_VARS <required-var>...]
  [VERSION_VAR <version-var>]
  [HANDLE_VERSION_RANGE]
  [HANDLE_COMPONENTS]
  [CONFIG_MODE]
  [NAME_MISMATCHED]
  [REASON_FAILURE_MESSAGE <reason-failure-message>]
  [FAIL_MESSAGE <custom-failure-message>]
  )