include gui in default Octave binary * Makefile.am (GUIDIR): New variable. (SUBDIRS): Use it in the list instead of @GUIDIR@. List $(GUIDIR) before src. * gui/src/Makefile.am (bin_PROGRAMS): Delete. (octlib_LTLIBRARIES): New variable. (liboctgui_la_SOURCES): Rename from octave_gui_SOURCES. (liboctgui_la_CPPFLAGS): Rename from octave_gui_CPPFLAGS. (liboctgui_la_LIBADD): Rename from octave_gui_LDADD. Don't include Octave libraries in the list. Do include Qt libraries in the list. (liboctgui_la_LDFLAGS): Rename from octave_gui_LDFLAGS. Only include -L@QT_LIBDIR@ option in the list. (moc_%.cpp): Use $(liboctgui_la_CPPFLAGS) in rules, not $(octave_gui_CPPFLAGS). * octave-gui.h: New file. * octave-gui.cc: Include it. (dissociate_terminal): In parent, wait for child process and exit with exit status of child. (octave_start_gui): Rename from main. * run-octave.in: Start with GUI by default. Rename -gui option -cli to allow running octave-cli binary. * main.cc, main-cli.cc: New files. * main.c: Delete. * src/Makefile (bin_PROGRAMS): Include octave-cli in the list. (OCTAVE_CORE_LIBS): New variable. (octave_cli_SOURCES, octave_cli_LDADD, octave_cli_LDFLAGS): New variables. (octave_SOURCES): Define to main.cc, not main.c. (octave_CPPFLAGS): New variable. (octave_LDFLAGS): Include -DENABLE_GUI=1 in the list. (octave_LDADD): Use $(OCTAVE_CORE_LIBS) and link with GUI lib. * octave.cc (force_gui_option, no_gui_option): New static variables. (octave_starting_gui): New function. (usage_string): Update for new options. (FORCE_GUI_OPTION, NO_GUI_OPTION): New macros. (long_opts): Include "force-gui" and "no-gui" options in the list. (octave_main): Handle FORCE_GUI_OPTION and NO_GUI_OPTION cases. Error if both --force-gui and --no-gui are used. * octave.h (octave_starting_gui): Provide decl.