Installing syslog-ng 4.0.1 on FreeBSD
Version 4.0.1 of syslog-ng was released a month ago. Unfortunately, the new release does not compile on FreeBSD. It was a temporary problem in the environment generating the source tgz. The next release is still almost a month away, but you can compile syslog-ng 4.0.1 yourself from my unofficial ports Makefile.
Learn how from my latest blog at https://www.syslog-ng.com/community/b/blog/posts/installing-syslog-ng-4-0-1-on-freebsd