Add a cmake detection for Xext library

Remove hardcoded Xext flags in tderandr and tdestyles/keramik
Add missing link flag in tdeui
(cherry picked from commit aae8990d33)

CMakeLists.txt

@@ -662,6 +662,12 @@ if( WITH_XCOMPOSITE )
   else( WITH_XCOMPOSITE )
     tde_message_fatal( "xcomposite support was requested, but xcomposite was not found on your system" )
   endif( XCOMPOSITE_FOUND )
+
+  # xext (krandr, kstyles/keramik, kdeui)
+  pkg_search_module( XEXT xext )
+  if( NOT XEXT_FOUND )
+    tde_message_fatal( "xext is required for xcomposite support, but was not found on your system" )
+  endif( )
 endif( WITH_XCOMPOSITE )
 
 

kdeui/CMakeLists.txt

@@ -148,7 +148,7 @@ set( ${target}_SRCS
 tde_add_library( ${target} SHARED AUTOMOC
   SOURCES ${${target}_SRCS}
   VERSION 4.2.0
-  LINK kdecore-shared ${FREETYPE_LIBRARIES} ${FONTCONFIG_LIBRARIES}
+  LINK kdecore-shared ${FREETYPE_LIBRARIES} ${FONTCONFIG_LIBRARIES} ${XEXT_LIBRARIES}
   DEPENDENCIES dcopidl
   DESTINATION ${LIB_INSTALL_DIR}
 )

krandr/CMakeLists.txt

@@ -43,6 +43,6 @@ set( ${target}_SRCS
 tde_add_library( ${target} SHARED AUTOMOC
   SOURCES ${${target}_SRCS}
   VERSION 0.0.95
-  LINK kdeui-shared ${XRANDR_LIBRARIES} Xext
+  LINK kdeui-shared ${XRANDR_LIBRARIES} ${XEXT_LIBRARIES}
   DESTINATION ${LIB_INSTALL_DIR}
 )

kstyles/keramik/CMakeLists.txt

@@ -65,6 +65,6 @@ set_source_files_properties( pixmaploader.cpp PROPERTIES OBJECT_DEPENDS ${CMAKE_
 
 tde_add_kpart( ${target} AUTOMOC
   SOURCES ${${target}_SRCS}
-  LINK kdefx-shared Xext
+  LINK kdefx-shared ${XEXT_LIBRARIES}
   DESTINATION ${PLUGIN_INSTALL_DIR}/plugins/styles
 )