Don't include jack/weakjack.h header when compiling for windows

libs/ardour/ardour/audioengine.h

@@ -37,7 +37,10 @@
 #include "pbd/signals.h"
 #include "pbd/stacktrace.h"
 
+#ifndef WIN32
 #include <jack/weakjack.h>
+#endif
+
 #include <jack/jack.h>
 #include <jack/transport.h>
 #include <jack/thread.h>

libs/ardour/audioengine.cc

@@ -31,8 +31,6 @@
 #include "pbd/unknown_type.h"
 #include "pbd/epa.h"
 
-#include <jack/weakjack.h>
-
 #include "midi++/port.h"
 #include "midi++/jack_midi_port.h"
 #include "midi++/mmc.h"

libs/ardour/port.cc

@@ -21,7 +21,9 @@
 #include "libardour-config.h"
 #endif
 
+#ifndef WIN32
 #include <jack/weakjack.h> // so that we can test for new functions at runtime
+#endif
 
 #include "pbd/compose.h"
 #include "pbd/error.h"