Index: longrun_tests/Makefile.am
===================================================================
--- longrun_tests/Makefile.am	(revision ffd5948e6b6df0fc8f2abad68ed521244aecd285)
+++ longrun_tests/Makefile.am	(revision a9868071cf8f0bf989581c29ebc69ef180809b8f)
@@ -36,4 +36,6 @@
 	-g \
 	-Wall \
+	-Wextra \
+	-Werror=return-type
 	-Wno-unused-function \
 	-quiet \