+# EXTRA_CFLAGS
+# You can specify extra flags to be passed to gcc here.
+#
+# One flag you might want to pass here is
+#
+# -DPERL4CAML_REFCOUNTING_EXPERIMENTAL=1
+#
+# which will turn on experimental support for reference counting.
+# Without this none of the Perl structures that you allocate will get
+# freed. With this we try to map Perl's reference counting onto
+# OCaml's garbage collection by using finalizers. There are some
+# problems with this code at the moment, hence it is disabled by
+# default.
+
+EXTRA_CFLAGS :=
+#EXTRA_CFLAGS := -DPERL4CAML_REFCOUNTING_EXPERIMENTAL=1
+