From f23f3c0d2f968093214b863c951758cd2af375c4 Mon Sep 17 00:00:00 2001
From: Kaspar Schleiser <kaspar@schleiser.de>
Date: Tue, 17 Nov 2015 12:50:48 +0100
Subject: [PATCH] sys: newlib: use xtimer_now64() for gettimeofday()

---
 sys/newlib/syscalls.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/sys/newlib/syscalls.c b/sys/newlib/syscalls.c
index 28ab23c03..2630dab02 100644
--- a/sys/newlib/syscalls.c
+++ b/sys/newlib/syscalls.c
@@ -38,6 +38,12 @@
 
 #include "uart_stdio.h"
 
+#ifdef MODULE_XTIMER
+#include <sys/time.h>
+#include "div.h"
+#include "xtimer.h"
+#endif
+
 /**
  * @brief manage the heap
  */
@@ -322,3 +328,14 @@ int _kill(pid_t pid, int sig)
     errno = ESRCH;                         /* not implemented yet */
     return -1;
 }
+
+#ifdef MODULE_XTIMER
+int _gettimeofday_r(struct _reent *r, struct timeval *restrict tp, void *restrict tzp)
+{
+    (void)tzp;
+    uint64_t now = xtimer_now64();
+    tp->tv_sec = div_u64_by_1000000(now);
+    tp->tv_usec = now - (tp->tv_sec * SEC_IN_USEC);
+    return 0;
+}
+#endif