Added Android support

Signed-off-by: Mikko Koppanen <mkoppanen@php.net>

configure.in

@@ -90,6 +90,12 @@ case "${host_os}" in
         fi
         AC_DEFINE(ZMQ_HAVE_LINUX, 1, [Have Linux OS])
         AC_CHECK_LIB(rt, sem_init)
+
+        case "${host_os}" in
+            *android*)
+                AC_DEFINE(ZMQ_HAVE_ANDROID, 1, [Have Android OS])
+            ;;
+        esac
         ;;
     *solaris*)
         # Define on Solaris to enable all library features

src/zmq.cpp

@@ -352,6 +352,9 @@ int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
 #if defined ZMQ_HAVE_WINDOWS
         Sleep (timeout_ > 0 ? timeout_ : INFINITE);
         return 0;
+#elif defined ZMQ_HAVE_ANDROID
+        usleep (timeout_ * 1000);
+        return 0;
 #else
         return usleep (timeout_ * 1000);
 #endif