The first thing you need to do once you’ve completed the installation of your operating system is to install the software dependencies required by Asterisk. The commands listed in Table 3.1, “Software dependencies for Asterisk on Ubuntu Server and CentOS Server” have been split into two columns, for Ubuntu Server and CentOS Server. These packages will allow you to build a basic Asterisk system, along with DAHDI and LibPRI. Not every module will be available at compile time with these dependencies; only the most commonly used modules will be built. If additional dependencies are required for other modules used later in the book, instructions will be provided as necessary.
Please be aware that the dependency information on CentOS 64-bit does not take into account that 32-bit libraries should not be installed. If such libraries are installed, you will end up with additional packages that use disk space and can cause conflicts if the system attempts to compile against a 32-bit library instead of its 64-bit counterpart. In order to resolve this problem, add .x86_64 to the end of each package name when installing it. So, for example, instead of executing yum install ncurses-devel, you will execute yum install ncurses-devel.x86_64. This is not necessary on a 32-bit platform.
These packages will get you most of what you’ll need to get started with installing Asterisk, DAHDI, and LibPRI. Note that you will also require the software dependencies for each package that we indicate needs to be installed. These will be resolved automatically for you when you use either yum or apt-get.
We have also included the OpenSSL development libraries, which are not strictly necessary to compile Asterisk, but are good to have: they enable key support and other encryption functionality.
We have installed vim as our editor, but you can choose anything you want, such as nano, joe, or emacs.
Asterisk contains a script that will install the dependencies for all features in Asterisk. At this time it is complete for Ubuntu but does not list all required packages for CentOS. Once you have downloaded Asterisk using the instructions in the section called “Downloading What You Need”, use the following commands if you would like to run it:
$cd ~/src/asterisk-complete/asterisk/1.8$sudo ./contrib/scripts/install_prereq install$sudo ./contrib/scripts/install_prereq install-unpackaged