well FIRST make sure that you are running the current ( and very last minor upgrade) CentOS 5.11
Code:
cat /etc/redhat-release
if not UPGRADE ASAP
Code:
su -
yum --releasever=5.11 upgrade
once that is done
Code:
su -
yum install binutils
but likely you will really want to install the development tools
Code:
su -
yum groupinstall "Development Tools" "Development Libraries"