---- Makefile -----
hw:
        CC -g -c helloworld.cc  `pkg-config gtkmm-2.4 --cflags`
        CC -g -o hw main.cc helloworld.o `pkg-config gtkmm-2.4 --cflags --libs`
--- Makefile ------

# the error when trying to run helloworld as provided by gtkmm project
# documentation

(hw:448): GLib-GObject-WARNING **: cannot create class for `GtkFileChooser', derived from non-classed parent type `GInterface'

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1155: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1873: assertion `g_type_parent (interface_type) == G_TYPE_INTERFACE' failed

(hw:448): GLib-GObject-WARNING **: cannot create class for `GtkFileChooser', derived from non-classed parent type `GInterface'

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1155: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1873: assertion `g_type_parent (interface_type) == G_TYPE_INTERFACE' failed

(hw:448): GLib-GObject-WARNING **: cannot create class for `GtkFileChooser', derived from non-classed parent type `GInterface'

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1155: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1873: assertion `g_type_parent (interface_type) == G_TYPE_INTERFACE' failed

(hw:448): GLib-GObject-WARNING **: cannot create class for `GtkFileChooserEmbed', derived from non-classed parent type `GInterface'

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1155: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1873: assertion `g_type_parent (interface_type) == G_TYPE_INTERFACE' failed

(hw:448): GLib-GObject-WARNING **: cannot create class for `GtkFileChooser', derived from non-classed parent type `GInterface'

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1155: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1873: assertion `g_type_parent (interface_type) == G_TYPE_INTERFACE' failed

(hw:448): GLib-GObject-WARNING **: cannot create class for `GtkFileChooser', derived from non-classed parent type `GInterface'

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1155: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1873: assertion `g_type_parent (interface_type) == G_TYPE_INTERFACE' failed

(hw:448): GLib-GObject-WARNING **: cannot create class for `GtkFileChooser', derived from non-classed parent type `GInterface'

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1155: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed

(hw:448): GLib-GObject-CRITICAL **: file gtype.c: line 1873: assertion `g_type_parent (interface_type) == G_TYPE_INTERFACE' failed

Gdk-ERROR **: The program 'hw' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadAtom (invalid Atom parameter)'.
  (Details: serial 11 error_code 5 request_code 18 minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
aborting...