penv - 'program environment' or 'ports environment' - is a simple
utility that executes a given command after setting some environment
variables corresponding to the current directory. This makes it
much easier to keep persistent environment settings for building
the same ports over and over again.
For example, the following series of commands:
$ echo cp1251 > /var/db/penv/databases/mysql323-server/WITH_CHARSET
$ echo all > /var/db/penv/databases/mysql323-server/WITH_XCHARSET
..allows a simple way to build the MySQL-3.23 server with the same
character set configuration every time by doing:
[root@ringworld:/usr/ports/databases/mysql323-server]# penv make
For more information, see the penv.1 manual page and the sample
configuration file in the penv distribution.
