FreeBSD: Consult installed ports' package message to see their requirements after installation

At installation time, ports display their pkg message to warn the user of further configuration. If for any reason you missed it (or just want to be sure you've done all the changes required for your system), you can display the messages for all ports:

pkg info -D -x `pkg query %n` | less

Excerpt of the results:

...
baobab-3.14.1:
bash-4.3.33:
======================================================================

bash requires fdescfs(5) mounted on /dev/fd

If you have not done it yet, please do the following:

        mount -t fdescfs fdesc /dev/fd

To make it permanent, you need the following lines in /etc/fstab:

        fdesc   /dev/fd         fdescfs         rw      0       0

======================================================================
bdftopcf-1.0.4:
bigreqsproto-1.1.2:
binutils-2.25:
bison-2.7.1,1:
...

Here's how to see how many ports you have installed:

pkg info | wc -l

Enjoy!