diff --git a/make/rules.mk b/make/rules.mk
index 00cbb12f..b7ebd56b 100644
--- a/make/rules.mk
+++ b/make/rules.mk
@@ -6,7 +6,7 @@
 # -- standard targets
 all:
 install: all
-clean:
+clean: tmpclean
 distclean: clean
 
 .PHONY: all install clean distclean %.this
@@ -67,7 +67,7 @@ doneclean:
 execlean: allclean objclean runclean textclean
 	rm -rf $(EXE) $(PLUGIN)
 
-distclean: clean objclean textclean tmpclean vcdistclean profclean timerclean varclean
+distclean: clean objclean textclean vcdistclean profclean timerclean varclean
 
 localclean: $(LOCAL_CLEAN)
 	rm -rf $(CLEAN)
@@ -158,6 +158,22 @@ trace-marks:
 		cp $$f.rep $$f ;\
 	done
 
+ifneq ($(TARGET),mingw)
+ldd:
+ifneq ($(wildcard *.o),)
+	@echo "======= objects:"
+	@for o in *.o; do echo "------- $$o"; ldd $$o; done
+endif
+ifneq ($(wildcard *.so),)
+	@echo "======= libraries:"
+	@for o in *.so; do echo "------- $$o"; ldd $$o; done
+endif
+ifneq ($(EXE),)
+	@echo "======= executables:"
+	@for o in $(EXE); do echo "------- $$o"; ldd $$o; done
+endif
+endif
+
 # -- special built-in targets
 
 .PRECIOUS: $(LOCAL_H)
@@ -181,7 +197,7 @@ strip.done: $(EXE_ALL)
 	$(CC) -M $(CPPFLAGS) $(DEPEND_CPPFLAGS) $< -o $@
 
 ifeq ($(LIBTYPE),shared)
-$(SO_PREFIX)%.so: %.o # $(LIB_SO)
+$(SO_PREFIX)%.so: %.o
 	$(LD) -shared $(LDFLAGS) $^ -o $@
 else
 $(SO_PREFIX)%.so: %.o