Re: Add "-Wimplicit-fallthrough" to default flags (was Re: pgsql:Support FETCH FIRST WITH TIES)

On Mon, May 11, 2020 at 3:41 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Julien Rouhaud <rjuju123@gmail.com> writes:
> > Note that timezone/zic.c would also have to be changed.
>
> Why?  It uses "fallthrough" which is a legal spelling per level 4.

GCC documentation mentions [ \t]*FALLTHR(OUGH|U)[ \t]* for level 4
(out of the view other alternatives), which AFAICT is case sensitive
(level 3 has fall(s | |-)?thr(ough|u)[ \t.!]*(-[^\n\r]*)?).