[LTP] [PATCH 1/1] preadv, pwritev: Fix preadv and pwritev link errors on android

[Petr Vorel]

From: Petr Vorel <petr.vorel@gmail.com>

pwritev() declaration on in bionic C library is guarded with __USE_GNU,
therefore define _GNU_SOURCE.

This fixes link errors implicit declaration errors.

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
Hi,

this is IMHO better than adding -D_GNU_SOURCE into CFLAGS.

Kind regards,
Petr
---
 testcases/kernel/syscalls/preadv/preadv01.c   | 2 ++
 testcases/kernel/syscalls/preadv/preadv02.c   | 2 ++
 testcases/kernel/syscalls/pwritev/pwritev02.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/testcases/kernel/syscalls/preadv/preadv01.c b/testcases/kernel/syscalls/preadv/preadv01.c
index 0565a086b..2b4ad5e20 100644
--- a/testcases/kernel/syscalls/preadv/preadv01.c
+++ b/testcases/kernel/syscalls/preadv/preadv01.c
@@ -23,6 +23,8 @@
 * and after reading the file, the file offset is not changed.
 */
 
+#define _GNU_SOURCE
+
 #include <string.h>
 #include <sys/uio.h>
 
diff --git a/testcases/kernel/syscalls/preadv/preadv02.c b/testcases/kernel/syscalls/preadv/preadv02.c
index af1c3b0c4..9935e3835 100644
--- a/testcases/kernel/syscalls/preadv/preadv02.c
+++ b/testcases/kernel/syscalls/preadv/preadv02.c
@@ -38,6 +38,8 @@
 * 8) preadv(2) should return -1 and set errno to ESPIPE.
 */
 
+#define _GNU_SOURCE
+
 #include <sys/uio.h>
 #include <unistd.h>
 #include "tst_test.h"
diff --git a/testcases/kernel/syscalls/pwritev/pwritev02.c b/testcases/kernel/syscalls/pwritev/pwritev02.c
index 2e6dbab57..9d8ff8725 100644
--- a/testcases/kernel/syscalls/pwritev/pwritev02.c
+++ b/testcases/kernel/syscalls/pwritev/pwritev02.c
@@ -36,6 +36,8 @@
 * 7) pwritev(2) should return -1 and set errno to ESPIPE.
 */
 
+#define _GNU_SOURCE
+
 #include <sys/uio.h>
 #include <unistd.h>
 #include "tst_test.h"
-- 
2.20.1