Hi there,
I am trying to install this software onto my server with FreeBSD. I get the following output:

============================
Installing CAMPSITE 2.4-beta

Campsite application is composed out of modules. Before installing
campsite they must be configured.

Do you want to read the description of campsite modules? (Y/N) [N]: y

Campsite modules description:

PARSER
The parser interprets the templates and returns an html page.
You will be able to configure which port the daemon will run on.

Press ENTER when ready


Checking install dependencies...OK
Testing install configuration...OK

Current install configuration:
APACHE_USER=apache
APACHE_GROUP=apache
CAMPSITE_DIR=/usr/local/campsite
BIN_DIR=/usr/local/campsite/bin
SBIN_DIR=/usr/local/campsite/sbin
ETC_DIR=/usr/local/campsite/etc
WWW_DIR=/usr/local/campsite/www
WWW_COMMON_DIR=/usr/local/campsite/www-common
DEFAULT_SMTP_SERVER_ADDRESS=localhost
DEFAULT_SMTP_SERVER_PORT=25
DEFAULT_DATABASE_SERVER_ADDRESS=localhost

Select 1 - Modify these options
0 - Continue to the next step

Option:
Current install configuration:
APACHE_USER=apache
APACHE_GROUP=apache
CAMPSITE_DIR=/usr/local/campsite
BIN_DIR=/usr/local/campsite/bin
SBIN_DIR=/usr/local/campsite/sbin
ETC_DIR=/usr/local/campsite/etc
WWW_DIR=/usr/local/campsite/www
WWW_COMMON_DIR=/usr/local/campsite/www-common
DEFAULT_SMTP_SERVER_ADDRESS=localhost
DEFAULT_SMTP_SERVER_PORT=25
DEFAULT_DATABASE_SERVER_ADDRESS=localhost

Select 1 - Modify these options
0 - Continue to the next step
Invalid option
Option: 0
Testing install configuration...OK
Please wait while checking modules configuration...
Checking DATABASE module dependencies...OK
Checking PARSER module dependencies...OK
Checking EVENT_HANDLERS module dependencies...OK
Checking SEARCH_ENGINE module dependencies...OK
Checking ADMIN_INTERFACE module dependencies...file libidn.so not found in /usr/lib:/usr/local/lib:/opt/lib:/usr/lib64
Could not find IDN library. Please install libidn-dev package.
Could not find IDN library. Please install libidn-dev package.
There is a dependecy problem. Please read the previous message and
install the required program/package.
=====================

I don't know where to find libiden-dev nor how to install it. Could you help me please? Thank you,
mohammad