diff --git a/Makefile b/Makefile
index 1446131..08921a5 100644
--- a/Makefile
+++ b/Makefile
@@ -747,7 +747,7 @@ clean:
 	@rm -f $(obj)MLO
 	@rm -f $(TIMESTAMP_FILE) $(VERSION_FILE)
 	@find $(OBJTREE) -type f \
-		\( -name 'core' -o -name '*.bak' -o -name '*~' \
+		\( -name 'core' -o -name '*.bak' -o -name '*~' -o -name '*.su' \
 		-o -name '*.o'	-o -name '*.a' -o -name '*.exe'	\) -print \
 		| xargs rm -f
 
diff --git a/config.mk b/config.mk
index 596ba93..fa33e62 100644
--- a/config.mk
+++ b/config.mk
@@ -232,6 +232,10 @@ CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
 	       $(call cc-option,-Wno-format-security)
 CFLAGS += $(CFLAGS_WARN)
 
+# Report stack usage if supported
+CFLAGS_STACK := $(call cc-option,-fstack-usage)
+CFLAGS += $(CFLAGS_STACK)
+
 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
 # option to the assembler.
 AFLAGS_DEBUG :=