dnsmasq: Add broken realtime clock build switch in full variant

By default dnsmasq uses the time function; which returns the time since
Epoch; to retrieve the current time. On boards which have no realtime
clock this can lead to side effects when the time is synced via ntp
as the "time wrap" forces dhcp leases to be considered as expired.
By enabling the broken realtime clock build switch dnsmasq uses the
times utility which returns the number of clock tick.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
[Jo-Philipp Wich: change symbol name, add sym to PKG_CONFIG_DEPENDS]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/network/services/dnsmasq/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dnsmasq
 PKG_VERSION:=2.76
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq
@@ -26,7 +26,8 @@ PKG_CONFIG_DEPENDS:=CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_dhcpv6 \
 	CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_dnssec \
 	CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_auth \
 	CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_ipset \
-	CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_conntrack
+	CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_conntrack \
+	CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_broken_rtc
 
 include $(INCLUDE_DIR)/package.mk
 
@@ -99,6 +100,9 @@ define Package/dnsmasq-full/config
 	config PACKAGE_dnsmasq_full_conntrack
 		bool "Build with Conntrack support."
 		default y
+	config PACKAGE_dnsmasq_full_broken_rtc
+		bool "Build with HAVE_BROKEN_RTC."
+		default n
 	endif
 endef
 
@@ -119,7 +123,8 @@ ifeq ($(BUILD_VARIANT),full)
 		$(if $(CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_dnssec),-DHAVE_DNSSEC) \
 		$(if $(CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_auth),,-DNO_AUTH) \
 		$(if $(CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_ipset),,-DNO_IPSET) \
-		$(if $(CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_conntrack),-DHAVE_CONNTRACK,)
+		$(if $(CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_conntrack),-DHAVE_CONNTRACK,) \
+		$(if $(CONFIG_PACKAGE_dnsmasq_$(BUILD_VARIANT)_broken_rtc),-DHAVE_BROKEN_RTC)
 	COPTS += $(if $(CONFIG_LIBNETTLE_MINI),-DNO_GMP,)
 else
 	COPTS += -DNO_AUTH -DNO_IPSET