A new release of the new jack-example-tools project is out.
This is version 4 which only contains bugfixes, and should now build on BSD systems as-is.

Changelog:

• Fix a typo in alsa_in manpage
• Fix source-code comments and manpage for jack_simple_client
• Remove includes of non-standard alloca.h header

As noted in the previous releases, please be aware that the JACK2 project has now stopped shipping with similar tools (as in, have them built-in).
See the original jack-example-tools announcement for details.