Merge topic 'std-thread-link'

94eee5e6 CMakeLib: Link to system thread libraries to support std::thread

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Daniel Chabrowski <dantezstudio@gmail.com>
Merge-request: !1789

CMakeLists.txt

@@ -310,6 +310,8 @@ endmacro()
 # Simply to improve readability of the main script.
 #-----------------------------------------------------------------------
 macro (CMAKE_BUILD_UTILITIES)
+  find_package(Threads)
+
   #---------------------------------------------------------------------
   # Create the kwsys library for CMake.
   set(KWSYS_NAMESPACE cmsys)

Source/CMakeLists.txt

@@ -765,6 +765,7 @@ target_link_libraries(CMakeLib cmsys
   ${CMAKE_LIBUV_LIBRARIES}
   ${CMAKE_LIBRHASH_LIBRARIES}
   ${CMake_KWIML_LIBRARIES}
+  ${CMAKE_THREAD_LIBS_INIT}
   )
 
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND CMAKE_SYSTEM_PROCESSOR MATCHES "sparc")