Fixed FTBFS due to missing linked libraries.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 56421bd79c)

src/CMakeLists.txt

@@ -1,3 +1,5 @@
+include( ConfigureChecks.cmake )
+
 include_directories(
   ${CMAKE_BINARY_DIR}
   ${CMAKE_CURRENT_BINARY_DIR}
@@ -117,6 +119,7 @@ tde_add_executable( kxineplayer AUTOMOC
      tdeio-shared
      kmplayerbackend-static
      ${XINE_LIBRARIES}
+     ${XEXT_LIBRARIES}
 
   DESTINATION ${BIN_INSTALL_DIR}
 )

src/ConfigureChecks.cmake

@@ -0,0 +1,18 @@
+#################################################
+#
+#  (C) 2020 Michele Calgaro
+#  michele (DOT) calgaro (AT) yahoo (DOT) it
+#
+#  Improvements and feedback are welcome
+#
+#  This file is released under GPL >= 2
+#
+#################################################
+
+## test for libXext
+pkg_search_module( XEXT xext )
+if( XEXT_FOUND )
+  check_include_file( "X11/extensions/shape.h" HAVE_X11_EXTENSIONS_SHAPE_H )
+else( )
+  tde_message_fatal( "Xext is required, but was not found on your system." )
+endif( )