Re: BUG #16920: Can't compile PostGIS with MingW64 against PostgreSQL 14 head

=?UTF-8?Q?Juan_Jos=C3=A9_Santamar=C3=ADa_Flecha?= <juanjo.santamaria@gmail.com> writes:
> After tweaking my configure a bit I am able to reproduce the problem. I
> think the problem is on MinGW-w64's longjmp. The attached patch fixes the
> issue for me.

Hmm, interesting.  The gcc manual is quite negative about these though:

https://gcc.gnu.org/onlinedocs/gcc/Nonlocal-Gotos.html

Also it's not clear that these are compatible with <setjmp.h>'s version
of jmp_buf.

What I'm wondering about, looking at that bit of code, is whether the
entire premise is correct for MinGW-64.  Maybe it does provide real
sigsetjmp and we shouldn't be overriding those names?

(None of this quite explains why a problem suddenly materialized
with 3174d69fb9, though.  That did not touch anything near our
setjmp/longjmp code AFAICS.)

			regards, tom lane