cmake HAVE_THREADS_H examples

awawa-dev/HyperHDR external/CMakeLists.txt :120 

check_include_file("threads.h" HAVE_THREADS_H)

HDFGroup/hdf5 CMakeLists.txt :835 

elseif (HAVE_THREADS_H)

SWI-Prolog/swipl-devel cmake/Config.cmake :5 

check_include_file(threads.h HAVE_THREADS_H)