bug#42860: 28.0.50; Build on OpenBSD fails in jansson.h

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 42860@debbugs.gnu.org,  phst@google.com
> Date: Fri, 14 Aug 2020 16:44:12 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Too old GCC version?  What do you have there?
> 
> Let's see...  Oh, wow!
> 
> -bash-5.0$ gcc --version
> gcc (GCC) 4.2.1 20070719 
> Copyright (C) 2007 Free Software Foundation, Inc.

Then you are probably better off configuring --without-json (assuming
the bugs you wanted to work on don't require native JSON support).