If you are absolutely sure you need it, you have two choices:
use a different distribution that has the version you need (perhaps in a VM on top of your CentOS)
Compile everything manually (I'd install rpm-build and use make rpm, but this might
a) break dependencies in the system, and
b) be a pretty complicated task to do, since the new version of glibc will require a lot of other prerequisites)
Well, that means that CentOS only has version 2.15 in its repositories. You could try to use yum --enablerepo=updates-testing --enablerepo=testing install glibc-devel but be aware, that an incompatible glibc may lead to problems with installed programs.
You can find the official glibc versions for CentOS on the CentOS mirror sites.
For example
If you are absolutely sure you need it, you have two choices:
make rpm
, but this mighta) break dependencies in the system, and
b) be a pretty complicated task to do, since the new version of glibc will require a lot of other prerequisites)
Well, that means that CentOS only has version 2.15 in its repositories. You could try to use
yum --enablerepo=updates-testing --enablerepo=testing install glibc-devel
but be aware, that an incompatible glibc may lead to problems with installed programs.To install glib on CentOS/RedHat/Fedora:
Login as root user via command prompt/shell