write_sensu: define _GNU_SOURCE for asprintf

On Linux, asprintf and vasprintf are only available when _GNU_SOURCE is defined.

diff --git a/src/write_sensu.c b/src/write_sensu.c
index be65399..0d568fe 100644 (file)
--- a/src/write_sensu.c
+++ b/src/write_sensu.c
@@ -24,6 +24,8 @@
  *   Fabrice A. Marie <fabrice at kibinlabs.com>
  */
 
+#define _GNU_SOURCE
+
 #include "collectd.h"
 #include "plugin.h"
 #include "common.h"