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diff --git a/libiberty/clock.c b/libiberty/clock.c
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+/* ANSI-compatible clock function.
+ Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc.
+
+This file is part of the libiberty library. This library 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 2, or (at your option)
+any later version.
+
+This library 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 GNU CC; see the file COPYING. If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+As a special exception, if you link this library with files
+compiled with a GNU compiler to produce an executable, this does not cause
+the resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why
+the executable file might be covered by the GNU General Public License. */
+
+#include "config.h"
+
+#ifdef HAVE_GETRUSAGE
+#include <sys/time.h>
+#include <sys/resource.h>
+#endif
+
+#ifdef HAVE_TIMES
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#include <sys/times.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef _SC_CLK_TCK
+#define GNU_HZ sysconf(_SC_CLK_TCK)
+#else
+#ifdef HZ
+#define GNU_HZ HZ
+#else
+#ifdef CLOCKS_PER_SEC
+#define GNU_HZ CLOCKS_PER_SEC
+#endif
+#endif
+#endif
+
+/* FIXME: should be able to declare as clock_t. */
+
+long
+clock ()
+{
+#ifdef HAVE_GETRUSAGE
+ struct rusage rusage;
+
+ getrusage (0, &rusage);
+ return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
+ + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
+#else
+#ifdef HAVE_TIMES
+ struct tms tms;
+
+ times (&tms);
+ return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ);
+#else
+#ifdef VMS
+ struct
+ {
+ int proc_user_time;
+ int proc_system_time;
+ int child_user_time;
+ int child_system_time;
+ } vms_times;
+
+ times (&vms_times);
+ return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
+#else
+ /* A fallback, if nothing else available. */
+ return 0;
+#endif /* VMS */
+#endif /* HAVE_TIMES */
+#endif /* HAVE_GETRUSAGE */
+}
+