* Jason Merrill: > As a compromise, it should be possible to error by default only in > cases where the implicit int (including as a return value) is either > the source or target of a non-value-preserving conversion, as those > are very likely to be bugs. That seems desirable for both camps.
Not sure, malloc returning 31-bit pointers goes a long way towards maintaining int/pointer compatibility for 64-bit systems, too. People might actually have a working implicit-declared malloc on 64-bit today, and still argue against the changes. > A simpler change to catch this particular bug would be to make > -Wint-conversion an error by default iff the sizes differ. That doesn't address other bugs around implicitly-declared functions, such as the bool/int ABI incompatibility, or the lack of type checking for arguments. I don't see those programmer mistakes because I think it's easier to debug them on your own: swapped arguments are visible in the source code, and GDB probably gives you enough data as well. So I suspect that people figure this out on their own. They are still wasting time on this, but probably somewhat less. Thanks, Florian
