add gdb debugging info on gtktiledviewer

Change-Id: I1460131d25212266b910d76a7713d1e973f7c415

libreofficekit/README

@@ -86,6 +86,22 @@ once a feature works there, then implement the Android part, with its slower
 development iteration (slow uploading to the device, the need to link all
 object files into a single .so, etc).
 
+* Debugging with gdb and gtktiledviewer
+
+To run gtktiledviewer:
+
+    bin/run gtktiledviewer $PWD/instdir/program path/to/test.odt
+
+To receive all incoming evetns from core use G_MESSAGES_DEBUG=all
+
+    G_MESSAGES_DEBUG=all bin/run gtktiledviewer $PWD/instdir/program ../test.odt
+
+To debug with gdb:
+
+    export LO_TRACE='gdb --tui --args'
+
+before bin/run, this will run gtktiledviewer in the debugger instead.
+
 LibreOfficeKitGtk
 *****************