[ptxdist] [PATCH] ntp: make sntp configureable

[Fabian Pflug <f.pflug@pengutronix.de>]

Signed-off-by: Fabian Pflug <f.pflug@pengutronix.de>
---
 rules/ntp.in   | 12 +++++++++++-
 rules/ntp.make | 10 +++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/rules/ntp.in b/rules/ntp.in
index 2d85c8fac..0d80840c2 100644
--- a/rules/ntp.in
+++ b/rules/ntp.in
@@ -97,6 +97,17 @@ config NTP_CRYPTO
 	help
 	  FIXME: This item needs to be documented
 
+config NTP_SNTP
+	bool
+	prompt "build SNTP"
+	help
+	  Simple Network Time Protocol is a subset of the Network
+	  Time Protocol (NTP). SNTP can be used when the ultimate
+	  performance of a full NTP implementation based on
+	  RFC 1305 is neither needed nor justified.
+	  It is strongly recommended that SNTP be used only at
+	  the extremities of the synchronization subnet.
+
 comment "Clock drivers"
 
 config NTP_ALL_CLOCK_DRIVERS
@@ -176,4 +187,3 @@ endif
 
 comment "NTP conflicts with OpenNTPD"
 	depends on NTP && OPENNTPD
-
diff --git a/rules/ntp.make b/rules/ntp.make
index 9c6c9555d..429023645 100644
--- a/rules/ntp.make
+++ b/rules/ntp.make
@@ -128,7 +128,7 @@ NTP_CONF_OPT	:= \
 	--disable-kmem \
 	--enable-accurate-adjtime \
 	--disable-simulator \
-	--without-sntp \
+	--$(call ptx/wwo, PTXCONF_NTP_SNTP)-sntp \
 	--without-ntpsnmpd \
 	--$(call ptx/endis, PTXCONF_NTP_SLEW_ALWAYS)-slew-always \
 	--$(call ptx/endis, PTXCONF_NTP_STEP_SLEW)-step-slew \
@@ -180,6 +180,14 @@ ifdef PTXCONF_NTP_NTPD
 	@$(call install_alternative, ntp, 0, 0, 0644, /etc/ntp-server.conf)
 endif
 
+#	#
+#	# sntp client
+#	#
+ifdef PTXCONF_NTP_SNTP
+	@$(call install_copy, ntp, 0, 0, 0755, -, \
+		/usr/sbin/sntp)
+endif
+
 ifdef PTXCONF_NTP_NTPD_STARTSCRIPT
 	@$(call install_alternative, ntp, 0, 0, 0755, /etc/init.d/ntp-server)
 
-- 
2.39.5