Re: master 3d38d1d: Add sqlite3 support to Emacs

[Po Lu]

Po Lu <luangruo@yahoo.com> writes:

> BTW, this doesn't compile on macOS.  It complains that
> `sqlite3_load_extension' is missing.

On a different note, SQLite3 extensions are linked dynamically, and they
could be proprietary software.  AFAIU, the SQLite3 developers even
provide a few proprietary extensions themselves, including one for
database encryption.

So I think we should check that the .so file passed to
`sqlite-load-extension' as the `module' argument contains a GPL
compatibility symbol before allowing SQLite to load it, similar to what
we do with Emacs modules.

RMS or someone else in the FSF might want to make sure loading SQLite
modules is okay from a legal perspective as well.  I don't know the
details, but we had legal problems with some SQLite modules at my
organization.

Hope this helped, thanks.