--- libelwix/configure.in	2016/05/18 12:47:42	1.30
+++ libelwix/configure.in	2019/09/24 15:49:52	1.51
@@ -1,8 +1,8 @@
 #
 # $Author: misho $
-# $Id: configure.in,v 1.30 2016/05/18 12:47:42 misho Exp $
+# $Id: configure.in,v 1.51 2019/09/24 15:49:52 misho Exp $
 #
-AC_INIT(libelwix, 4.0, misho@elwix.org)
+AC_INIT(libelwix, 4.21, misho@elwix.org)
 AC_CONFIG_SRCDIR([src/elwix.c])
 AC_CONFIG_HEADERS([inc/config.h])
 
@@ -34,7 +34,7 @@ AC_C_INLINE
 # Checks for library functions.
 AC_FUNC_MALLOC
 AC_FUNC_REALLOC
-AC_CHECK_FUNCS([memset regcomp strchr strerror])
+AC_CHECK_FUNCS([memset regcomp strchr strerror link_addr])
 
 DEBUG=no
 AC_MSG_CHECKING(Debug Build)