You must install libopus-dev to build mod_opus. Stop.
解决:
安装libopus-devel rmp包: https://centos.pkgs.org/6/linuxtech/libopus-devel-1.1-1.el6.i686.rpm.html
1.Create the repository config file /etc/yum.repos.d/linuxtech.repo:
[linuxtech]
name=LinuxTECH
baseurl=http://pkgrepo.linuxtech.net/el6/release/
enabled=1
gpgcheck=1
gpgkey=http://pkgrepo.linuxtech.net/el6/release/RPM-GPG-KEY-LinuxTECH.NET
2.install libopus-devel rpm package:
# yum install libopus-devel