Added missing link flags for threaded example.

README.md

@@ -49,6 +49,7 @@ The following dependencies are needed by the examples and test programs:
  - Added `glfwSetDropCallback` and `GLFWdropfun` for receiving dropped files
  - Bugfix: The debug context attribute was set from `GL_ARB_debug_output` even
            when a debug context had not been requested
+ - Bugfix: The particles example was not linked against the threading library
  - [Cocoa] Added `_GLFW_USE_RETINA` to control whether windows will use the full
            resolution on Retina displays
  - [Cocoa] Bugfix: Using a 1x1 cursor for hidden mode caused some screen

examples/CMakeLists.txt

@@ -49,6 +49,8 @@ else()
     add_executable(wave WIN32 wave.c)
 endif()
 
+target_link_libraries(particles ${CMAKE_THREAD_LIBS_INIT} ${RT_LIBRARY})
+
 if (MSVC)
     set(WINDOWS_BINARIES boing gears heightmap particles simple splitview wave)