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diff --git a/lib/timespec.h b/lib/timespec.h
new file mode 100644
index 0000000..db3453a
--- /dev/null
+++ b/lib/timespec.h
@@ -0,0 +1,38 @@
+/* timespec -- System time interface
+
+   Copyright (C) 2000, 2002, 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#if ! defined TIMESPEC_H
+# define TIMESPEC_H
+
+# include <time.h>
+
+/* Return negative, zero, positive if A < B, A == B, A > B, respectively.
+   Assume the nanosecond components are in range, or close to it.  */
+static inline int
+timespec_cmp (struct timespec a, struct timespec b)
+{
+  return (a.tv_sec < b.tv_sec ? -1
+	  : a.tv_sec > b.tv_sec ? 1
+	  : a.tv_nsec < b.tv_nsec ? -1
+	  : a.tv_nsec > b.tv_nsec ? 1
+	  : 0);
+}
+
+void gettime (struct timespec *);
+int settime (struct timespec const *);
+
+#endif