FreeRADIUS currently supports:
-* link:https://www.pcre.org/original/doc/html/[libpcre] and
-link:https://www.pcre.org/current/doc/html/[libpcre2] both of which
-provide
+* link:https://www.pcre.org/current/doc/html/[libpcre2] which
+provides
link:https://en.wikipedia.org/wiki/Perl_Compatible_Regular_Expressions[Perl
Compatible Regular expressions].
* Regex support provided by the local libc implementation, usually
....
...
-Debug : regex-pcre : no
Debug : regex-pcre2 : yes
Debug : regex-posix : no
Debug : regex-posix-extended : no
[NOTE]
====
-This expansion is only available if the server is built with libpcre or libpcre2.
+This expansion is only available if the server is built with libpcre2.
Use the output of `radiusd -Xxv` to determine which regular expression library in use.
....
...
-Debug : regex-pcre : no
Debug : regex-pcre2 : yes
Debug : regex-posix : no
Debug : regex-posix-extended : no