Use this variable to indicate to the runtime that the program makes calls to WebSphere MQ (formerly MQSeries). When USE_MQSERIES is set to 1 (on, true, yes), the runtime attempts to pass calls to functions that begin with the string "MQ" to the WebSphere MQ interface. If the named routine does not exit, the runtime uses the normal search sequence to find a matching function. When USE_MQSERIES is set to the default value of 0 (off, false, no), the runtime does not perform any special handling.