cmake Pthreads examples

supercollider/supercollider CMakeLists.txt :301 

find_package(Pthreads)

casacore/casacore CMakeLists.txt :469 

find_package(Pthreads REQUIRED)

skyjake/Doomsday-Engine doomsday/external/fluidsynth/CMakeLists.txt :170 

find_package ( Pthreads REQUIRED )

apertus-open-source-cinema/opencine 3rdParty/LibRaw/CMakeLists.txt :231 

FIND_PACKAGE(Pthreads)

flintlib/flint CMakeLists.txt :136 

find_package(PThreads REQUIRED)