Y2038: add function __gmtime64

Tested with 'make check' on x86_64-linux-gnu and i686-linux.gnu.

	* include/time.h
	(__gmtime64): Add.
	* time/gmtime.c
	(__gmtime64): Add.
	[__TIMESIZE != 64] (__gmtime): Turn into a wrapper.

1 files changed, 16 insertions, 2 deletions

diff --git a/time/gmtime.c b/time/gmtime.c
index bda09bc021..ee901c3ba1 100644
--- a/time/gmtime.c
+++ b/time/gmtime.c
@@ -28,10 +28,24 @@ __gmtime_r (const time_t *t, struct tm *tp)
 libc_hidden_def (__gmtime_r)
 weak_alias (__gmtime_r, gmtime_r)
 
+/* Return the `struct tm' representation of *T in UTC.  */
+struct tm *
+__gmtime64 (const __time64_t *t)
+{
+  return __tz_convert (*t, 0, &_tmbuf);
+}
+
+/* Provide a 32-bit variant if needed.  */
+
+#if __TIMESIZE != 64
+
+libc_hidden_def (__gmtime64)
 
-/* Return the `struct tm' representation of *T in UTC.	*/
 struct tm *
 gmtime (const time_t *t)
 {
-  return __tz_convert (*t, 0, &_tmbuf);
+  __time64_t t64 = *t;
+  return __gmtime64 (&t64);
 }
+
+#endif