diff -ur clive-0.4.5.orig/configure.in clive-0.4.5/configure.in
--- clive-0.4.5.orig/configure.in	2004-11-11 19:00:21 +0200
+++ clive-0.4.5/configure.in	2005-06-29 20:54:09 +0300
@@ -11,6 +11,7 @@
 AC_PROG_MAKE_SET
 
 # Checks for header files.
+AC_GNU_SOURCE
 AC_HEADER_STDC
 AC_CHECK_HEADERS([errno.h netdb.h string.h netinet/in.h sys/wait.h])