An RPM spec file build and install memcached 1.4.x with slab reassignment.
To Build:
sudo yum -y install rpmdevtools && rpmdev-setuptree
sudo yum -y install libevent-devel
wget http://www.memcached.org/files/memcached-1.4.17.tar.gz -O ~/rpmbuild/SOURCES/memcached-1.4.17.tar.gz
wget https://raw.github.com/nmilford/rpm-memcached/master/memcached.spec -O ~/rpmbuild/SPECS/memcached.spec
rpmbuild -bb ~/rpmbuild/SPECS/memcached.spec