cmake OpenXR examples

shawwn/noh cmake/FindOpenXR.cmake :96 

find_package(OpenXR CONFIG)

KitwareMedical/SlicerVirtualReality CMakeLists.txt :160 

find_package(OpenXR REQUIRED)

FlightGear/flightgear CMakeLists.txt :339 

find_package(OpenXR QUIET)