--- freeradius-server-2.0.4.orig/configure.in	2008-04-26 17:10:09.000000000 +0200
+++ freeradius-server-2.0.4/configure.in	2008-06-13 14:18:04.000000000 +0200
@@ -38,6 +38,9 @@
 dnl #
 dnl #############################################################
 
+dnl Define _GNU_SOURCE, this should be done before any feature test.
+AC_DEFINE(_GNU_SOURCE)
+
 dnl Check for GNU cc
 AC_PROG_CC
 AC_PROG_CXX