bug#55278: 29.0.50; OSM package

[Richard Stallman]

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  > No, it's implemented in json.c in the Emacs sources.  But to have that
  > function defined, you need to build Emacs with libjansson, which is an
  > optional dependency of Emacs.

That is strange.  If the function json-parse-string is defined in the
Emacs sources, why compile it only if something else is enabled?

Does OSM depend on anything about jansson other than json-parse-string?
What does jansson do?

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)