Index: ocamlnet-2.2.9/src/rpc-auth-local/Makefile
===================================================================
--- ocamlnet-2.2.9.orig/src/rpc-auth-local/Makefile
+++ ocamlnet-2.2.9/src/rpc-auth-local/Makefile
@@ -1,5 +1,6 @@
 TOP_DIR=../..
 
+CC_OPTIONS += -ccopt -D_GNU_SOURCE
 PKGNAME  = rpc-auth-local
 OBJECTS  = rpc_auth_local.cmo
 COBJECTS = rpclocal.o