Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
> It sounds like we should stop using the old and broken
> AC_CHECK_HEADER_STDBOOL macro.
Yeah, that's what I was imagining: assume that <stdbool.h> exists
and works, and check only to see if sizeof(bool) is acceptable.
> ... Later autoconf versions check for
> C99 "or later", but we're stuck with the old one and I doubt we are
> going to upgrade it.
I'm not sure --- there was some discussion a week or two ago about
upgrading autoconf after all. But whether we do or not, it's hard
to see what AC_HEADER_STDBOOL is buying us.
regards, tom lane