Use system GTK, GDK, X11, find with pkg-config

indra/cmake/UI.cmake

@@ -15,12 +15,12 @@ if (USESYSTEMLIBS)
         gmodule-2.0
         gtk+-2.0
         gthread-2.0
-        libpng
         pango
         pangoft2
         pangox
         pangoxft
-        sdl
+        x11
+        xinerama
         )
   endif (LINUX)
 
@@ -32,36 +32,35 @@ if (USESYSTEMLIBS)
     add_definitions(${${pkg}_CFLAGS_OTHERS})
   endforeach(pkg)
 else (USESYSTEMLIBS)
-  if (LINUX)
-    use_prebuilt_binary(gtk-atk-pango-glib)
-  endif (LINUX)
 
   if (LINUX)
-    set(UI_LIBRARIES
-        atk-1.0
-        gdk-x11-2.0
-        gdk_pixbuf-2.0
-        Xinerama
+  include(FindPkgConfig)
+    
+    set(PKGCONFIG_PACKAGES
+        atk
+        cairo
+        gdk-2.0
+        gdk-pixbuf-2.0
         glib-2.0
         gmodule-2.0
-        gobject-2.0
+        gtk+-2.0
         gthread-2.0
-        gtk-x11-2.0
-        pango-1.0
-        pangoft2-1.0
-        pangox-1.0
-        pangoxft-1.0
-        ${FREETYPE_LIBRARIES}
+        pango
+        pangoft2
+        pangox
+        pangoxft
+        x11
+        xinerama
         )
-  endif (LINUX)
 
-  include_directories (
-      ${LIBS_PREBUILT_DIR}/include
-      ${LIBS_PREBUILT_DIR}/include
-      )
-  foreach(include ${${LL_ARCH}_INCLUDES})
-      include_directories(${LIBS_PREBUILT_DIR}/include/${include})
-  endforeach(include)
+  foreach(pkg ${PKGCONFIG_PACKAGES})
+    pkg_check_modules(${pkg} REQUIRED ${pkg})
+    include_directories(${${pkg}_INCLUDE_DIRS})
+    link_directories(${${pkg}_LIBRARY_DIRS})
+    list(APPEND UI_LIBRARIES ${${pkg}_LIBRARIES})
+    add_definitions(${${pkg}_CFLAGS_OTHERS})
+  endforeach(pkg)
+  endif (LINUX)
 endif (USESYSTEMLIBS)
 
 if (LINUX)