Get AIX 6.1 compiling again by making msg_t class explicit

Older versions of gcc have problems with in-line forward declarations
when there's a naming conflict with a global symbol.

Signed-off-by: AJ Lewis <aj.lewis@quantum.com>

Expand the original patch to all such forward declarations.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/src/pgm_sender.hpp b/src/pgm_sender.hpp
index d8f046d..99405f0 100644
--- a/src/pgm_sender.hpp
+++ b/src/pgm_sender.hpp
@@ -41,19 +41,22 @@
 namespace zmq
 {
 
+    class io_thread_t;
+    class session_base_t;
+
     class pgm_sender_t : public io_object_t, public i_engine
     {
 
     public:
 
-        pgm_sender_t (class io_thread_t *parent_, const options_t &options_);
+        pgm_sender_t (zmq::io_thread_t *parent_, const options_t &options_);
         ~pgm_sender_t ();
 
         int init (bool udp_encapsulation_, const char *network_);
 
         //  i_engine interface implementation.
-        void plug (class io_thread_t *io_thread_,
-            class session_base_t *session_);
+        void plug (zmq::io_thread_t *io_thread_,
+            zmq::session_base_t *session_);
         void unplug ();
         void terminate ();
         void activate_in ();