https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78772
--- Comment #4 from ma.jiang at zte dot com.cn --- (In reply to Markus Trippelsdorf from comment #3) > Please no. > There are many other cases where optimizations could introduce issues that > you will not notice when you compile without warnings. > Just use -Wall. Hi, Markus Thanks for your quick reply. I know the existence of both "Wall" and "Wextra", And I did use them when compiling my codes. But, there are many guys do not know them. Moreover, As I see many open source projects does not use them either. It is that OK to assume all gcc users know "Wall"? On the other side, creating a new mechanism to open warnings for dangerous optimizations is not a hard work as I think. We just need to create a table which connect the optimization and corresponding warning.
