fix qnx compile errors

src/CMakeLists.txt

@@ -79,7 +79,7 @@ elseif(UNIX)
   elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
     set(LIBS_SYSTEM compat pthread)
   elseif(CMAKE_SYSTEM_NAME MATCHES "QNX")
-    set(LIBS_SYSTEM c)
+    set(LIBS_SYSTEM c socket)
   else()
     set(LIBS_SYSTEM c pthread)
   endif()

src/Socket.h

@@ -61,6 +61,9 @@
 #include <netinet/tcp.h>
 #include <arpa/inet.h>
 #include <netdb.h>
+#ifdef __QNXNTO__
+#define AI_ADDRCONFIG 0
+#endif
 #include <stdio.h>
 #include <unistd.h>
 #include <errno.h>