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

[Lars Ingebrigtsen]

This is on OpenBSD 6.6, with "pkg_add jansson", build from Emacs trunk now:

gmake[1]: Entering directory '/home/larsi/src/emacs/trunk/src'
  CC       json.o
In file included from json.c:27:
/usr/local/include/jansson.h: In function 'json_incref':
/usr/local/include/jansson.h:124: warning: implicit declaration of function 
'__atomic_add_fetch'
/usr/local/include/jansson.h:124: error: '__ATOMIC_ACQUIRE' undeclared (first 
use in this function)
/usr/local/include/jansson.h:124: error: (Each undeclared identifier is 
reported only once
/usr/local/include/jansson.h:124: error: for each function it appears in.)
/usr/local/include/jansson.h: In function 'json_decref':
/usr/local/include/jansson.h:134: warning: implicit declaration of function 
'__atomic_sub_fetch'
/usr/local/include/jansson.h:134: error: '__ATOMIC_RELEASE' undeclared (first 
use in this function)
gmake[1]: *** [Makefile:401: json.o] Error 1
gmake[1]: Leaving directory '/home/larsi/src/emacs/trunk/src'
gmake: *** [Makefile:424: src] Error 2
*** Error 2 in /home/larsi/src/emacs/trunk (makefile:4 'all')

I haven't investigated further -- I wonder whether it's immediately
obvious to Philipp what the problem is here.  :-)



In GNU Emacs 28.0.50 (build 11, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, 
cairo version 1.16.0)
 of 2020-08-13 built on xo
Repository revision: 1bed252ae9109493133a0cc3e9aad9e9a5ddde37
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid


-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no