Error: (E115) sc_signal<T> cannot have more than one driver:

signal `top.signal_0' (sc_signal)
 first driver `top.driver.execCycle'  (sc_method_process)
 second driver `top.driver.memDone' (sc_method_process)
In file: ../../../../src/sysc/communication/sc_signal.cpp:73

In process: top.driver.memDone @ 10 ns

在执行SystemC程序的时候，出现这种错误时，只需输入：

  export SC_SIGNAL_WRITE_CHECK=DISABLE

即可。