tried to include FindSFML.cmake when installed

cmake/config-package.in.cmake

@@ -1 +1,23 @@
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_file_name@")
+cmake_minimum_required(VERSION 2.6)
+include("${CMAKE_CURRENT_LIST_DIR}/@targets_file_name@")
+
+# include the old FindSFML.cmake to be backward compatible
+# it will also populate SFML_<comp>_DEPENDENCIES
+# FindSFML.cmake will only be included, if sfml is installed. Otherwise the file can not be found (which should be not problematically)
+if(NOT SFML_ROOT)
+    # find SFML_ROOT so FindSFML.cmake can work properly
+    find_path(SFML_ROOT include/SFML/Config.hpp
+              PATHS "${CMAKE_CURRENT_LIST_DIR}/.."
+                    "${CMAKE_CURRENT_LIST_DIR}/../..")
+endif(NOT SFML_ROOT)
+include("${CMAKE_CURRENT_LIST_DIR}/Modules/FindSFML.cmake" OPTIONAL)
+
+# sfml's dependencies are added privately to all sfml targets, but they might be needed, when use static linking
+# so add dependencies
+if(SFML_STATIC_LIBRARIES)
+    set_property(TARGET sfml::sfml-audio PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES_DEBUG APPEND ${SFML_AUDIO_DEPENDENCIES})
+    set_property(TARGET sfml::sfml-window PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES_DEBUG APPEND ${SFML_WINDOW_DEPENDENCIES})
+    set_property(TARGET sfml::sfml-graphics PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES_DEBUG APPEND ${SFML_GRAPHICS_DEPENDENCIES})
+    set_property(TARGET sfml::sfml-system PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES_DEBUG APPEND ${SFML_SYSTEM_DEPENDENCIES})
+    set_property(TARGET sfml::sfml-network PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES_DEBUG APPEND ${SFML_NETWORK_DEPENDENCIES})
+endif(SFML_STATIC_LIBRARIES)