package: add libconfig package

package/libconfig/Config.in

@@ -0,0 +1,9 @@
+config BR2_PACKAGE_LIBCONFIG
+	bool "libconfig"
+	help
+	  Libconfig is a simple library for manipulating structured
+	  configuration files. The file format is more compact and more
+	  readable than XML. And unlike XML, it is type-aware, so it is
+	  not necessary to do string parsing in application code.
+
+	  http://www.hyperrealm.com/libconfig/

package/libconfig/libconfig.mk

@@ -0,0 +1,20 @@
+#############################################################
+#
+# libconfig
+#
+#############################################################
+LIBCONFIG_VERSION:=1.3
+LIBCONFIG_SOURCE:=libconfig-$(LIBCONFIG_VERSION).tar.gz
+LIBCONFIG_SITE:=http://www.hyperrealm.com/libconfig/
+LIBCONFIG_AUTORECONF:=NO
+LIBCONFIG_INSTALL_STAGING:=YES
+LIBCONFIG_INSTALL_TARGET:=YES
+LIBCONFIG_INSTALL_TARGET_OPT:=DESTDIR=$(TARGET_DIR) install-strip
+
+ifneq ($(BR2_INSTALL_LIBSTDCPP),y)
+LIBCONFIG_CONF_OPT:=--disable-cxx
+endif
+
+LIBCONFIG_DEPENDENCIES = uclibc
+
+$(eval $(call AUTOTARGETS,package,libconfig))