Fix linking with static Qt Embedded builds

Make sure pthreads and dl get linked when building Hyperion
using a static Qt Embedded library instead of Qt X11

Author: maxnet

cmake/qt4/Qt4ConfigDependentSettings.cmake

@@ -270,6 +270,16 @@ if(Q_WS_X11)
 
 endif()
 
+if(Q_WS_QWS)
+  set(CMAKE_THREAD_PREFER_PTHREADS 1)
+  find_package(Threads)
+  if(CMAKE_USE_PTHREADS_INIT)
+    set(QT_QTCORE_LIB_DEPENDENCIES ${QT_QTCORE_LIB_DEPENDENCIES} ${CMAKE_THREAD_LIBS_INIT})
+  endif()
+
+  set (QT_QTCORE_LIB_DEPENDENCIES ${QT_QTCORE_LIB_DEPENDENCIES} ${CMAKE_DL_LIBS})
+
+endif()
 
 if(Q_WS_WIN)
   set(QT_QTGUI_LIB_DEPENDENCIES ${QT_QTGUI_LIB_DEPENDENCIES} imm32 winmm)