Original commit message from CVS:
Links also against libgstcontrol
libgstplay_@GST_MAJORMINOR@include_HEADERS = play.h
libgstplay_@GST_MAJORMINOR@_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_CFLAGS)
-libgstplay_@GST_MAJORMINOR@_la_LIBADD = $(GST_LIBS) $(GST_PLUGINS_LIBS)
+libgstplay_@GST_MAJORMINOR@_la_LIBADD = $(GST_LIBS) $(GST_PLUGINS_LIBS) $(GST_CONTROL_LIBS)
libgstplay_@GST_MAJORMINOR@_la_LDFLAGS = -version-info @GST_PLUGINS_LIBVERSION@
noinst_HEADERS = playpipelines.c