Bruno Haible <bruno@clisp.org> writes:

> What exactly is the problem that you were seeing? (Commands to reproduce,
> and compiler output, please.)

I haven't had time to debug it, but since a few days libidn fails to
build with a reference to rpl_free, that looks related to this thread
and the recent gnulib changes for the free module:

https://oss-fuzz-build-logs.storage.googleapis.com/log-002189ee-3c98-45b8-9bde-3bfb20317e9a.txt

/Simon