.endd
For a &"matches"& test, after expansion of both strings, the second one is
-interpreted as a regular expression. Exim uses the PCRE regular expression
+interpreted as a regular expression. Exim uses the PCRE2 regular expression
library, which provides regular expressions that are compatible with Perl.
The match succeeds if the regular expression matches any part of the first
and INCLUDE directives appropriately,
or set PCRE2_CONFIG=yes to use the installed &(pcre-config)& command.
If your operating system has no
-PCRE2 support then you will need to obtain and build the current PCRE
+PCRE2 support then you will need to obtain and build the current PCRE2
from &url(https://github.com/PhilipHazel/pcre2/releases).
More information on PCRE2 is available at &url(https://www.pcre.org/).