guile-json is not a GNU project, but it is hosted on Savannah. It has a release in May 2020, and is licensed by GPL3.0.
This sounds very compatible, but I don't know that it's the best. Carl On 6/19/20, 5:30 PM, "lilypond-devel on behalf of Owen Lamb" <lilypond-devel-bounces+carl.d.sorensen+digest=gmail....@gnu.org on behalf of owendl...@gmail.com> wrote: Hi all, I need to be able to expose the contents of a SMuFL font's JSON metadata file to LilyPond. From what I can tell, LilyPond currently doesn't have any sort of JSON-parsing library in its dependencies, either in Scheme or in C++. An internet search revealed that there are... a *lot* of options. Is there a particular one that would suit LilyPond the best, legally/otherwise? Thanks, Owen
