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+/* Convert UTC calendar time to simple time. Like mktime but assumes UTC.
+
+ Copyright (C) 1994, 1997, 2003-2004, 2006-2007, 2009-2016 Free Software
+ Foundation, Inc. This file is part of the GNU C Library.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+#include <time.h>
+
+#ifdef _LIBC
+typedef time_t mktime_offset_t;
+#else
+# undef __gmtime_r
+# define __gmtime_r gmtime_r
+# define __mktime_internal mktime_internal
+# include "mktime-internal.h"
+#endif
+
+time_t
+timegm (struct tm *tmp)
+{
+ static mktime_offset_t gmtime_offset;
+ tmp->tm_isdst = 0;
+ return __mktime_internal (tmp, __gmtime_r, &gmtime_offset);
+}