http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36299
--- Comment #9 from Vincent Lefèvre <vincent at vinc17 dot org> 2011-03-02
15:17:33 UTC ---
(In reply to comment #8)
> Every warning warns about something valid in C, otherwise it would be an error
> not a warning.
No, for instance:
int main(void)
{
int i;
return i;
}
This is undefined behavior and detected by GCC, but one gets only a warning:
tst.c: In function ‘main’:
tst.c:4: warning: ‘i’ is used uninitialized in this function
Compare to a == 0 in the above testcase, which has a well-defined behavior.
