[ntpsec commit] Build the util/precision.c utility.

[Eric S. Raymond]

Module:    ntpsec
Branch:    master
Commit:    65042c2bd12d7e7adcff1324edcd4a19ab37238a
Changeset: http://git.ntpsec.org/ntpsec/commit/?id=65042c2bd12d7e7adcff1324edcd4a19ab37238a

Author:    Eric S. Raymond <esr at thyrsus.com>
Date:      Wed Sep 30 10:35:58 2015 -0400

Build the util/precision.c utility.

Revert the half-baked attempt to make it use clock_gettime().  To be fixed
later.

---

 util/precision.c | 14 ++++++++++++--
 util/wscript     | 11 +++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/util/precision.c b/util/precision.c
index 1a92576..5152ac2 100644
--- a/util/precision.c
+++ b/util/precision.c
@@ -119,7 +119,9 @@ default_get_precision(void)
 {
 	struct timeval tp;
 	struct timezone tzp;
+#ifdef HAVE_GETCLOCK
 	struct timespec ts;
+#endif
 	long last;
 	int i;
 	long diff;
@@ -128,14 +130,22 @@ default_get_precision(void)
 
 	usec = 0;
 	val = MAXSTEP;
-	(void) clock_gettime(CLOCK_GETTIME, &ts);
+#ifdef HAVE_GETCLOCK
+	(void) getclock(TIMEOFDAY, &ts);
 	tp.tv_sec = ts.tv_sec;
 	tp.tv_usec = ts.tv_nsec / 1000;
+#else /*  not HAVE_GETCLOCK */
+	gettimeofday(&tp, &tzp);
+#endif /* not HAVE_GETCLOCK */
 	last = tp.tv_usec;
 	for (i = 0; i < MINLOOPS && usec < HUSECS;) {
-		(void) clock_gettime(CLOCK_REALTIME, &ts);
+#ifdef HAVE_GETCLOCK
+		(void) getclock(TIMEOFDAY, &ts);
 		tp.tv_sec = ts.tv_sec;
 		tp.tv_usec = ts.tv_nsec / 1000;
+#else /*  not HAVE_GETCLOCK */
+		gettimeofday(&tp, &tzp);
+#endif /* not HAVE_GETCLOCK */
 		diff = tp.tv_usec - last;
 		last = tp.tv_usec;
 		if (diff < 0)
diff --git a/util/wscript b/util/wscript
index 8d0c509..b4abd02 100644
--- a/util/wscript
+++ b/util/wscript
@@ -26,3 +26,14 @@ def build(ctx):
 		install_path= "${PREFIX}/sbin/"
 	)
 
+	ctx(
+		target		= "precision",
+		features	= "c cprogram bld_include src_include libisc_include",
+		source		= ["precision.c"],
+		includes	= [
+					"%s/precision/" % bldnode
+				],
+		use		= "ntp opts isc M RT PTHREAD",
+		install_path= "${PREFIX}/sbin/"
+	)
+