How to install third-party libraries (say opencv) with yum?

Question

I am very new to the yum package system, so please forgive my rookie question.

I am using an Amazon Linux AMI on EC2, would like to install a package, say opencv with yum:

$ sudo yum install opencv
Loaded plugins: priorities, update-motd, upgrade-helper
amzn-main/latest                                          | 2.1 kB     00:00
amzn-updates/latest                                       | 2.3 kB     00:00
No package opencv available.
Error: Nothing to do

It appears the repository yum knows does not contain a opencv distribution. I am wondering whether there is a way to tell yum to find this package at certain third-party repository, and if so, is there a good place to search for repository that contains particular packages? Any pointer will be greatly appreciated!

Answer 1

Check if epel repo is disabled by running:

sudo yum repolist all

If you see epel is disabled, then enable it and search:

sudo yum --enablerepo=epel search opencv

If you find it, then install it. If you don't find it, you may to download the source, build and install it. Should be straightforward.