Squashed 'libs/cppzmq/' content from commit c66fc609

git-subtree-dir: libs/cppzmq
git-subtree-split: c66fc6094b2a03439dea8469719e221e80e2e8e7

examples/hello_world.cpp

@@ -0,0 +1,9 @@
+#include <zmq.hpp>
+
+int main()
+{
+    zmq::context_t ctx;
+    zmq::socket_t sock(ctx, zmq::socket_type::push);
+    sock.bind("inproc://test");
+    sock.send(zmq::str_buffer("Hello, world"), zmq::send_flags::dontwait);
+}