The editor cuts my lines so I will just add the terminal :

$ yum remove boost*
$ yum install boost141* boost141-* libevent-devel* libevent
$ cd /usr/lib/boost141 && /bin/cp -rf * ../
$ cd /usr/lib64/boost141 && /bin/cp -rf * ../
$ cd /usr/include && ln -s boost141/boost/

$ $ vi /etc/yum.repos.d/drizzle.repo

// add this

[drizzle-dev]
name=drizzle-dev
baseurl=http://rpm.drizzle.org/7-dev/redhat/5/$basearch/
enabled=0
gpgcheck=0

$ yum install --enablerepo=drizzle-dev drizzle7 drizzle7-devel libdrizzle libdrizzle-devel

$ rpm -U http://rpm.drizzle.org/7-dev/redhat/5/i386/libdrizzle-devel-2011.08.2

$ wget http://launchpad.net/gearmand/trunk/0.24/+download/gearmand-0.24.tar.gz
$ tar xf gearmand-0.24.tar.gz
$ cd gearmand-0.24
$ libdrizzle_CFLAGS="-I/usr/include/libdrizzle-2.0" libdrizzle_LIBS="-ldrizzle-2.0" CXX=/usr/bin/g++44 CC=/usr/bin/gcc44 ./configure --prefix=/usr
$ make
$ make test
$ make install