tools/libxenstat: ensure strnlen() declaration is visible

Its guard was updated such that it is visible by default when POSIX 2008
was adopted by glibc. It's not visible by default on older glibc.

Fixes: 40fe714ca424 ("tools/libs/stat: use memcpy instead of strncpy in getBridge")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libs/stat/xenstat_linux.c b/tools/libs/stat/xenstat_linux.c
index e0d242e1bc4290857fdb39647d94889c7ea09a43..c00b26d4d8980f26ccb96ccb57e3e5df2ef6ed9b 100644 (file)
--- a/tools/libs/stat/xenstat_linux.c
+++ b/tools/libs/stat/xenstat_linux.c
@@ -20,6 +20,7 @@
  * Use is subject to license terms.
  */
 
+#define _GNU_SOURCE
 #include <fcntl.h>
 #include <dirent.h>
 #include <sys/types.h>