with debuging enabled and optimization disabled:

    count                                     warning
     ---                                    -----------
      [ returning values as const earns a warning]
      7 /home/chris/programs/synfig/ETL/ETL/_pen.h:217: warning: type qualifiers ignored on function return type
      7 /home/chris/programs/synfig/ETL/ETL/_pen.h:219: warning: type qualifiers ignored on function return type
      1 /usr/include/sigc++-2.0/sigc++/functors/slot.h:431: warning: type qualifiers ignored on function return type
      1 /usr/include/sigc++-2.0/sigc++/functors/slot.h:437: warning: type qualifiers ignored on function return type
      1 /usr/include/sigc++-2.0/sigc++/functors/slot.h:440: warning: type qualifiers ignored on function return type
      1 nodebase.h:88: warning: type qualifiers ignored on function return type
      1 nodebase.h:89: warning: type qualifiers ignored on function return type

      [ missing feature ]
      1 widget_waypoint.cpp:237:2: warning: #warning This really needs to be fixed to support value node waypoints!
      1 widget_waypoint.cpp:264:2: warning: #warning This too!

      [ real bug? ]
r1508 1 cellrenderer_value.cpp:203: warning: returning reference to temporary

r1503 1 keyframetreestore.cpp:201: warning: not enough variable arguments to fit a 
  |
  `---- fixed in


with debugging disabled and optimization (-O4) enabled, extra warnings:

      1 cc1: warning: command line option "-Wno-deprecated" is valid for C++/Java/ObjC++ but not for C

      1 cellrenderer_timetrack.cpp:971: warning: 'model.synfig::Waypoint::Model::bias' is used uninitialized in this function
      1 cellrenderer_timetrack.cpp:971: warning: 'model.synfig::Waypoint::Model::continuity' is used uninitialized in this function
      1 cellrenderer_timetrack.cpp:971: warning: 'model.synfig::Waypoint::Model::priority' is used uninitialized in this function
      1 cellrenderer_timetrack.cpp:971: warning: 'model.synfig::Waypoint::Model::temporal_tension' is used uninitialized in this function
      1 cellrenderer_timetrack.cpp:971: warning: 'model.synfig::Waypoint::Model::tension' is used uninitialized in this function