use sed to preprocess OCTAVE_(BEGIN|END)_NAMESPACE macros for Qt moc * libgui/module.mk (moc-h-command): New macro. (moc-%.h : %.h): New rule. (moc-%.cc): Depend on moc-%.h instead of %.h. * libgui/graphics/module.mk (libgraphics_MOC_H): New variable. Add it to the $(libgui_CLEANFILES) list. * libgui/qterminal/module.mk (%canon_reldir%_libqterminal_la_MOC_H): New variable. Add it to the $(libgui_CLEANFILES) list. * libgui/src/module.mk (octave_gui_MOC_H): New variable. Add it to the $(libgui_CLEANFILES) list.