Re: Add "-Wimplicit-fallthrough" to default flags

Alvaro Herrera <alvherre@2ndquadrant.com> writes:
>> I fear that is going to mean that we revert this patch.

> Or we can filter-out the -Wimplicit-fallthrough, or change to level 3,
> for bison-emitted files.

Let's just go to level 3 overall (and revert the changes you made for
level 4 compliance --- they're more likely to cause back-patching
pain than do anything useful).

            regards, tom lane