Crossroads i/o ("libxs") is a library for building scalable and high performance distributed applications. it fits between classic bsd sockets, jms/amqp-style message queues, and enterprise message-oriented middleware.

crossroads i/o extends the standard socket interfaces with features traditionally provided by specialised messaging middleware products, providing an abstraction of asynchronous message queues, multiple messaging patterns, message filtering (subscriptions), seamless access to multiple transport protocols, and more.

this package contains the development library and header files for the drop-in 'libzmq' compatibility library for zeromq language bindings and applications.