Required for the port to build with GStreamer 1.6+.

commit ec4a3d62b68a57254515f01fc5ea3325ffb1dbfb
Author: Niels Ole Salscheider <niels_ole@salscheider-online.de>
Date:   Tue Sep 29 20:52:15 2015 +0200

    Farstream: gst/gstconfig.h can be in LIBDIR, search for it explicitly

    Since GStreamer-1.5.1 config header file moved to LIBDIR.

    Reviewed-by: Alexandr Akulich <akulichalexander@gmail.com>

--- TelepathyQt/Farstream/CMakeLists.txt
+++ TelepathyQt/Farstream/CMakeLists.txt
@@ -2,7 +2,7 @@ if(FARSTREAM_COMPONENTS_FOUND)
     include_directories(${TELEPATHY_FARSTREAM_INCLUDE_DIR}
                         ${TELEPATHY_GLIB_INCLUDE_DIR}
                         ${FARSTREAM_INCLUDE_DIR}
-                        ${GSTREAMER_INCLUDE_DIR}
+                        ${GSTREAMER_INCLUDE_DIRS}
                         ${GLIB2_INCLUDE_DIR}
                         ${LIBXML2_INCLUDE_DIR}
                         ${DBUS_INCLUDE_DIR})
--- cmake/modules/FindGStreamer.cmake
+++ cmake/modules/FindGStreamer.cmake
@@ -13,12 +13,12 @@
 
 # TODO: Other versions --> GSTREAMER_X_Y_FOUND (Example: GSTREAMER_0_8_FOUND and GSTREAMER_0_10_FOUND etc)
 
-IF (GSTREAMER_INCLUDE_DIR AND GSTREAMER_LIBRARIES AND GSTREAMER_BASE_LIBRARY AND GSTREAMER_INTERFACE_LIBRARY)
+IF (GSTREAMER_INCLUDE_DIRS AND GSTREAMER_LIBRARIES AND GSTREAMER_BASE_LIBRARY AND GSTREAMER_INTERFACE_LIBRARY)
    # in cache already
    SET(GSTREAMER_FIND_QUIETLY TRUE)
-ELSE (GSTREAMER_INCLUDE_DIR AND GSTREAMER_LIBRARIES AND GSTREAMER_BASE_LIBRARY AND GSTREAMER_INTERFACE_LIBRARY)
+ELSE (GSTREAMER_INCLUDE_DIRS AND GSTREAMER_LIBRARIES AND GSTREAMER_BASE_LIBRARY AND GSTREAMER_INTERFACE_LIBRARY)
    SET(GSTREAMER_FIND_QUIETLY FALSE)
-ENDIF (GSTREAMER_INCLUDE_DIR AND GSTREAMER_LIBRARIES AND GSTREAMER_BASE_LIBRARY AND GSTREAMER_INTERFACE_LIBRARY)
+ENDIF (GSTREAMER_INCLUDE_DIRS AND GSTREAMER_LIBRARIES AND GSTREAMER_BASE_LIBRARY AND GSTREAMER_INTERFACE_LIBRARY)
 
 IF (NOT WIN32)
    # use pkg-config to get the directories and then use these values
@@ -38,6 +38,15 @@ FIND_PATH(GSTREAMER_INCLUDE_DIR gst/gst.h
    PATH_SUFFIXES gstreamer-1.0
    )
 
+FIND_PATH(GSTREAMER_CONF_INCLUDE_DIR gst/gstconfig.h
+   PATHS
+   ${PC_GSTREAMER_INCLUDEDIR}
+   ${PC_GSTREAMER_INCLUDE_DIRS}
+   PATH_SUFFIXES gstreamer-1.0
+   )
+
+SET(GSTREAMER_INCLUDE_DIRS ${GSTREAMER_INCLUDE_DIR} ${GSTREAMER_CONF_INCLUDE_DIR})
+
 FIND_LIBRARY(GSTREAMER_LIBRARIES NAMES gstreamer-1.0
    PATHS
    ${PC_GSTREAMER_LIBDIR}
@@ -57,6 +66,12 @@ ELSE (GSTREAMER_INCLUDE_DIR)
    MESSAGE(STATUS "GStreamer: WARNING: include dir not found")
 ENDIF (GSTREAMER_INCLUDE_DIR)
 
+IF (GSTREAMER_CONF_INCLUDE_DIR)
+	#MESSAGE(STATUS "DEBUG: Found GStreamer config include dir: ${GSTREAMER_CONF_INCLUDE_DIR}")
+ELSE (GSTREAMER_CONF_INCLUDE_DIR)
+   MESSAGE(STATUS "GStreamer: WARNING: config include dir not found")
+ENDIF (GSTREAMER_CONF_INCLUDE_DIR)
+
 IF (GSTREAMER_LIBRARIES)
    #MESSAGE(STATUS "DEBUG: Found GStreamer library: ${GSTREAMER_LIBRARIES}")
 ELSE (GSTREAMER_LIBRARIES)
@@ -65,6 +80,6 @@ ENDIF (GSTREAMER_LIBRARIES)
 
 
 INCLUDE(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(GStreamer  DEFAULT_MSG  GSTREAMER_LIBRARIES GSTREAMER_INCLUDE_DIR GSTREAMER_BASE_LIBRARY)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(GStreamer  DEFAULT_MSG  GSTREAMER_LIBRARIES GSTREAMER_INCLUDE_DIRS GSTREAMER_BASE_LIBRARY)
 
-MARK_AS_ADVANCED(GSTREAMER_INCLUDE_DIR GSTREAMER_LIBRARIES GSTREAMER_BASE_LIBRARY)
+MARK_AS_ADVANCED(GSTREAMER_INCLUDE_DIRS GSTREAMER_LIBRARIES GSTREAMER_BASE_LIBRARY)