Fix FTBFS due to missing linked libraries.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

ConfigureChecks.cmake

@@ -32,6 +32,7 @@ if( WITH_NVCONTROL )
 
   find_path( NVCONTROL_INCLUDE_DIR NAMES "NVCtrlLib.h" PATH_SUFFIXES "NVCtrl" )
   find_library( NVCONTROL_LIBRARIES NAMES XNVCtrl )
+  pkg_search_module( XEXT xext )
 
   if( NVCONTROL_LIBRARIES AND NVCONTROL_INCLUDE_DIR )
     set( NVCONTROL_FOUND true)
@@ -42,4 +43,5 @@ if( WITH_NVCONTROL )
    else()
     tde_message_fatal( "NVidia support has been requested but <NVCtrlLib.h> or libXNVCtrl were not found on your system" )
   endif( NVCONTROL_FOUND )
+
 endif( WITH_NVCONTROL )

src/sources/CMakeLists.txt

@@ -43,4 +43,5 @@ tde_add_library( sources STATIC_PIC AUTOMOC
   LINK
      tdecore-shared
      ${NVCONTROL_LIBRARIES}
+     ${XEXT_LIBRARIES}
 )