src/interfaces/csp_if_udp: define MSG_CONFIRM as 0 if not defined
MacOS X doesn't have MSG_CONFIRM defined.  Define it as nop, 0.
@@ -27,6 +27,10 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#include <csp/arch/csp_thread.h>
#include "../csp_id.h"
+#ifndef MSG_CONFIRM
+#define MSG_CONFIRM (0)
+#endif
+
struct sockaddr_in peer_addr;
static int lport = 9600;
static int rport = 9600;
