bind: add support for building bind with libxml2 or libjson

At least one of libjson|libxml2 is required for bind
statistics to function.

Selecting libjson|libxml2 will result in an additional
dependency required to build and install bind-libs.

Signed-off-by: Hal Martin <hal.martin@gmail.com>

net/bind/Config.in

@@ -14,4 +14,24 @@ config BIND_ENABLE_FILTER_AAAA
 		Additional details are available at
 		https://kb.isc.org/article/AA-00576/0/Filter-AAAA-option-in-BIND-9-.html
 
+config BIND_LIBJSON
+	bool
+	default n
+	prompt "Include libjson support in bind-server"
+	help
+		BIND 9 supports reporting statistics about usage. libjson
+		is required to report server statistics in JSON format. 
+		Building with libjson support will require the libjson-c
+		package to be installed as well.
+
+config BIND_LIBXML2
+	bool
+	default n
+	prompt "Include libxml2 support in bind-server"
+	help
+		BIND 9 supports reporting statistics about usage. 
+		libxml2 is required to report server statistics in XML
+		format. Building with libjson support will require the
+		libxml2 package to be installed as well.
+
 endif

net/bind/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=bind
 PKG_VERSION:=9.11.2
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 USERID:=bind=57:bind=57
 
 PKG_MAINTAINER:=Noah Meyerhans <frodo@morgul.net>
@@ -29,7 +29,16 @@ PKG_INSTALL:=1
 PKG_USE_MIPS16:=0
 
 PKG_CONFIG_DEPENDS := \
-	CONFIG_BIND_ENABLE_FILTER_AAAA
+	CONFIG_BIND_ENABLE_FILTER_AAAA \
+	CONFIG_BIND_LIBJSON \
+	CONFIG_BIND_LIBXML2
+
+ifdef CONFIG_BIND_LIBXML2
+  PKG_BUILD_DEPENDS += libxml2
+endif
+ifdef CONFIG_BIND_LIBJSON
+  PKG_BUILD_DEPENDS += libjson-c
+endif
 
 include $(INCLUDE_DIR)/package.mk
 
@@ -48,6 +57,12 @@ define Package/bind-libs
   DEPENDS:=+libopenssl +zlib
   TITLE:=bind shared libraries
   URL:=https://www.isc.org/software/bind
+ifdef CONFIG_BIND_LIBJSON
+  DEPENDS+= +libjson-c
+endif
+ifdef CONFIG_BIND_LIBXML2
+  DEPENDS+= +libxml2
+endif
 endef
 
 define Package/bind-server
@@ -104,9 +119,7 @@ CONFIGURE_ARGS += \
 	--disable-threads \
 	--disable-linux-caps \
 	--with-openssl="$(STAGING_DIR)/usr" \
-	--with-libjson=no \
 	--with-libtool \
-	--with-libxml2=no \
 	--without-lmdb \
 	--enable-epoll=yes \
 	--with-gost=no \
@@ -120,6 +133,22 @@ ifdef CONFIG_BIND_ENABLE_FILTER_AAAA
 		--enable-filter-aaaa
 endif
 
+ifdef CONFIG_BIND_LIBJSON
+	CONFIGURE_ARGS += \
+		--with-libjson="$(STAGING_DIR)/usr"
+else
+	CONFIGURE_ARGS += \
+		--with-libjson=no
+endif
+
+ifdef CONFIG_BIND_LIBXML2
+	CONFIGURE_ARGS += \
+		--with-libxml2="$(STAGING_DIR)/usr"
+else
+	CONFIGURE_ARGS += \
+		--with-libxml2=no
+endif
+
 CONFIGURE_VARS += \
 	BUILD_CC="$(TARGET_CC)" \