Is there any way to prevent "deferred conversion from string constant to 'char*'" from appearing on GCC?

I recently upgraded to gcc4.3, and the following warning appears after that.

I think this happened by writing char* where you need to write const char*.

My code is really long. (Almost 500 files) Cannot change to const one by one.

But I have to write -error If there is warning, it cannot be compiled. Is there a good way?

`warning: deprecated conversion from string constant to ‘char*’