any g++ compilation warning to detect empty if statement

[eric]

Hi all,

recently encounter following bugs:

if (a > b);        //<- bug in the careless ";" here
   return 0;

Due to the extra ";" in the if statement line, it always return 0.

Anyone know g++ has any compiler - warning flag to detect this kind of
error? if not, is it any source code checking tools can do it ?

thanks,
Eric.