Perform the following on a build box as a regular user.

sudo yum groupinstall 'Development Tools'

cd /opt
git clone https://github.com/DBezemer/rpm-haproxy.git 
cd ./rpm-haproxy
git checkout 1.7

make

Resulting RPM will be in /opt/rpm-haproxy/rpmbuild/RPMS/

Based on the Red Hat 6.4 RPM spec for haproxy 1.4 combined with work done by @nmilford @resmo and @kevholmes

Additional logging added based on https://www.percona.com/blog/2014/10/03/haproxy-give-me-some-logs-on-centos-6-5/