zeromq: require IPv6 support in toolchain

The zeromq package was recently bumped from version 2.2.0 to version 3.2.2,
which has introduced a requirement for IPv6 support in the toolchain. At
present, IPv6 support is mandatory in zeromq: there is no configuration option
to enable/disable the feature.

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/zeromq/Config.in

@@ -1,9 +1,10 @@
-comment "zeromq requires a toolchain with C++, LARGEFILE + WCHAR support"
-	depends on !(BR2_INSTALL_LIBSTDCPP &&  BR2_LARGEFILE && BR2_USE_WCHAR)
+comment "zeromq requires a toolchain with C++, IPV6, LARGEFILE and WCHAR support"
+	depends on !(BR2_INSTALL_LIBSTDCPP && BR2_INET_IPV6 && BR2_LARGEFILE && BR2_USE_WCHAR)
 
 config BR2_PACKAGE_ZEROMQ
 	bool "zeromq"
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_INET_IPV6
 	depends on BR2_LARGEFILE # util-linux
 	depends on BR2_USE_WCHAR # util-linux
 	select BR2_PACKAGE_UTIL_LINUX