You are now in the directory for the port "security/pam-mysql" (package name "pam_mysql-0.4.7").
This is the one-line description for this port:
A pam module for authenticating with MySQL
Please read the "description file" for a longer description.
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This port requires package(s) "gettext-0.10.35 gmake-3.79.1 mysql-client-3.22.32" to build.
This port requires package(s) "mysql-client-3.22.32" to run.