What is a supported method for a Tcl application to access Sybase data?

There used to be a sybtcl extension, but from what I can see, there's
hasn't been, from what I can tell, a change in about five years to it.

So what alternatives are there? Of course, the first thing I had
suggested to me was "rewrite the app in Perl because Perl DBI is well
supported". Assuming that I'd rather leave that option open if nothing
else works.

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