Merge pull request #2677 from compnerd/requirements

CoreFoundation: Threads is `REQUIRED`

Author: compnerd

CoreFoundation/CMakeLists.txt

@@ -22,7 +22,7 @@ set(CMAKE_POSITION_INDEPENDENT_CODE YES)
 
 set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
 set(THREADS_PREFER_PTHREAD_FLAG OFF)
-find_package(Threads)
+find_package(Threads REQUIRED)
 
 if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
   find_package(LibXml2 REQUIRED)