provide per-directory clean targets * Makefile.am, doc/module.mk, libgui/graphics/module.mk, libgui/module.mk, libgui/qterminal-module.mk, libgui/src/module.mk, libinterp/corefcn/module.mk, libinterp/module.mk, libinterp/octave-value/module.mk, libinterp/operators/module.mk, libinterp/parse-tree/module.mk, libinterp/template-inst/module.mk, liboctave/array/module.mk, liboctave/cruft/Faddeeva/module.mk, liboctave/cruft/amos/module.mk, liboctave/cruft/blas-xtra/module.mk, liboctave/cruft/daspk/module.mk, liboctave/cruft/dasrt/module.mk, liboctave/cruft/dassl/module.mk, liboctave/cruft/fftpack/module.mk, liboctave/cruft/lapack-xtra/module.mk, liboctave/cruft/misc/module.mk, liboctave/cruft/module.mk, liboctave/cruft/odepack/module.mk, liboctave/cruft/ordered-qz/module.mk, liboctave/cruft/quadpack/module.mk, liboctave/cruft/ranlib/module.mk, liboctave/cruft/slatec-err/module.mk, liboctave/cruft/slatec-fn/module.mk, liboctave/module.mk, liboctave/numeric/module.mk, liboctave/operators/module.mk, liboctave/system/module.mk, liboctave/util/module.mk, scripts/java/module.mk, scripts/module.mk, scripts/startup/module.mk, src/module.mk: For each major subdirectory tree (liboctave, libinterp, libgui, src, doc, examples, test), provide SUBDIR-clean, SUBDIR-distclean, and SUBDIR-maintainer-clean targets.

--- a/libgui/module.mk	Fri Jul 17 00:59:10 2015 -0400
+++ b/libgui/module.mk	Fri Jul 17 14:44:47 2015 -0400
@@ -1,5 +1,11 @@
 if AMCOND_BUILD_GUI
 
+libgui_EXTRA_DIST =
+
+libgui_CLEANFILES =
+libgui_DISTCLEANFILES =
+libgui_MAINTAINERCLEANFILES =
+
 MOC_CPPFLAGS =
 
 ## Fix for bug #42839 where -mieee CFLAG option is added to CPPFLAGS by gnulib.
@@ -26,8 +32,6 @@
 
 LOCALES = $(patsubst libgui/languages/%.ts, libgui/languages/%.qm, $(TRANSLATIONS))
 
-EXTRA_DIST += libgui/default-qt-settings.in $(TRANSLATIONS)
-
 include libgui/src/module.mk
 include libgui/graphics/module.mk
 include libgui/qterminal-module.mk
@@ -108,8 +112,24 @@
 DIRSTAMP_FILES += \
   libgui/languages/$(octave_dirstamp)
 
-DISTCLEANFILES += \
+libgui_EXTRA_DIST += \
+  $(TRANSLATIONS) \
+  libgui/default-qt-settings.in
+
+libgui_DISTCLEANFILES += \
   libgui/default-qt-settings \
   $(LOCALES)
 
+CLEANFILES += $(libgui_CLEANFILES)
+DISTCLEANFILES += $(libgui_DISTCLEANFILES)
+MAINTAINERCLEANFILES += $(libgui_MAINTAINERCLEANFILES)
+
+libgui-clean:
+	rm -f $(libgui_CLEANFILES)
+
+libgui-distclean: libgui-clean
+	rm -f $(libgui_DISTCLEANFILES)
+
+libgui-maintainer-clean: libgui-distclean
+	rm -f $(libgui_MAINTAINERCLEANFILES)
 endif