cmake CMAKE_HAVE_THR_CREATE examples

rxseger/rx_tools cmake/FindThreads.cmake :149 

CHECK_LIBRARY_EXISTS(thread thr_create "" CMAKE_HAVE_THR_CREATE)

CatxFish/obs-virtual-cam cmake/Modules/FindThreads.cmake :140 

check_library_exists(thread thr_create "" CMAKE_HAVE_THR_CREATE)