cmake: Add check of libvorbis version

This is essential for applications that encode to ogg

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

ConfigureChecks.cmake

@@ -255,7 +255,12 @@ if( WITH_VORBIS )
     tde_message_fatal( "Ogg/Vorbis support are requested, but `libvorbisenc` not found" )
   endif( )
 
-  set( HAVE_VORBIS 1 )
+  check_library_exists( vorbis vorbis_bitrate_addblock "${VORBIS_LIBRARY_DIRS}" HAVE_VORBIS_2 )
+  if( HAVE_VORBIS_2 )
+    set( HAVE_VORBIS 2 )
+  else( )
+    set( HAVE_VORBIS 1 )
+  endif( )
   set( OGG_VORBIS 1 )
 
 endif( WITH_VORBIS )

config.h.cmake

@@ -31,7 +31,7 @@
 #cmakedefine HAVE_MACHINE_SOUNDCARD_H 1
 
 #cmakedefine HAVE_LIBFLAC 1
-#cmakedefine HAVE_VORBIS 1
+#cmakedefine HAVE_VORBIS @HAVE_VORBIS@
 #cmakedefine OGG_VORBIS 1
 
 /* mpeglib */