be more conformant, from Timur.R.Mustafin@mcst.ru

test/inet/bug-if1.c

@@ -16,6 +16,8 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define _GNU_SOURCE 1
+
 #include <errno.h>
 #include <limits.h>
 #include <stdio.h>

test/nptl/tst-eintr1.c

@@ -16,6 +16,8 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define _GNU_SOURCE 1
+
 #include <errno.h>
 #include <pthread.h>
 #include <signal.h>

test/nptl/tst-eintr2.c

@@ -16,6 +16,8 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define _GNU_SOURCE 1
+
 #include <errno.h>
 #include <pthread.h>
 #include <signal.h>

test/nptl/tst-eintr3.c

@@ -16,6 +16,8 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define _GNU_SOURCE 1
+
 #include <errno.h>
 #include <pthread.h>
 #include <signal.h>

test/nptl/tst-eintr5.c

@@ -16,6 +16,8 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define _GNU_SOURCE 1
+
 #include <errno.h>
 #include <pthread.h>
 #include <signal.h>