Add check for not linking to libstdc++
diff --git a/src/Makefile.am b/src/Makefile.am
index 83bee49..188c38c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -62,4 +62,8 @@
 main_CPPFLAGS = $(GLIB_CFLAGS)
 main_LDADD = libharfbuzz.la $(GLIB_LIBS)
 
+TESTS = \
+	check-libstdc++.sh \
+	$(NULL)
+
 -include $(top_srcdir)/git.mk