udhcpc: fix a warning in debug code

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/networking/udhcp/domain_codec.c b/networking/udhcp/domain_codec.c
index cee31f14dd4ef1addde43a5c8fe4e272f417a0aa..5a923cc2ccdcf108bfbf81ba59f0cfaebce3a2dd 100644 (file)
--- a/networking/udhcp/domain_codec.c
+++ b/networking/udhcp/domain_codec.c
@@ -7,6 +7,7 @@
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 #ifdef DNS_COMPR_TESTING
+# define _GNU_SOURCE
 # define FAST_FUNC /* nothing */
 # define xmalloc malloc
 # include <stdlib.h>