Consider adding even more compiler warnings, even when they require code changes.
Some of these warnings _might_ be worth adding, either globally or selectively, but they would require a significant amount of effort to modify our code. (I already got the easy cases with legacy/trac#19180, I think.)
```
cast-qual (4.6)
Rationale: triggers everywhere, even in some pretty normal C. Would
be nice to have it trigger less, but would need to blow up a bunch
of API things. Bigger project.
conversion (4.6)
Rationale: triggers all over. Probably wrong code in some
cases, but careful thought needed in most Bigger project.
sign-conversion (4.6)
Triggers ALL OVER. Quite possibly a bug in some cases, though.
Bigger project.
cast-align (3)
We already do this safely. Need to re-test on a system with
stronger-than-intel alignment rules, though.
shadow (3)
mistake; worth fixing.
switch-default (3)
Not sure this is a good idea; someof these look like mistakes,
but some don't.
assign-enum (clang)
triggers all over; worth fixing.
conditional-uninitialized (clang)
triggers all over; not sure whether this is worth fixing.
```
issue