List of oldest supported version of top 10 Linux Distros and their glibc version according to distrowatch.com.
Out of all versions with published EOLs, 2.12 is the oldest glibc still active, found in CentOS 6.8.
If CentOS 6 and 7 are eliminated, the oldest glibc is 2.23 in Ubuntu and Slackware.
Mint - 18.3 sylvia
- EOL: 2021-04
- glibc: 2.27
- EOL: 2023-04
- glibc: 2.27
- EOL: 2021-04
- glibc: 2.23
MX Linux - 17.1
- EOL: None (Based on Debian 9 which has no EOL yet)
- glibc: 2.24
- Notes: MX-16 is based on Debian 8 which is EOL 2020-05
Arch Linux - 2020.01.22
- EOL: Rolling release
- glibc: 2.30
Gentoo - 2020-01-22
- EOL: Rolling release
- glibc: 2.29
Slackware - 14.2
- EOL: None
- glibc: 2.23
- NOTE: No EOLs are published. 14.2 was released in 2016. Older versions have libc < 2.17.
Debian - 9 stretch
- EOL: None announced
- glibc: 2.24
Fedora - 30
- EOL: None announced
- glibc: 2.29
OpenSUSE - 15.1
- EOL: None announced
- glibc: 2.26
- EOL: 2020-11
- glibc: 2.12
- EOL: 2024-06
- glibc: 2.17
- EOL: None announced
- glibc: 2.28
FreeBSD - 10.3
- EOL: 2018-04
- glibc: N/A
Just published a little helper script, that parses distrowatch. It may help, if you want to know, whether a linux distro supports a special package version, e.g.: give me the first ubuntu release, that supports glibc-2.14.
https://github.com/fsonnenburg/get_linux_version_for_package_version/blob/main/get_linux_version_for_package_version.py