Linux builds compatibility

The key dependency of ISPC binary on Linux, which defines compatibility with different Linux distributions, is GLIBC version.

Here's the GLIBC versions used in different distributions:

Distro	GLIBC version
Ubuntu 16.04	2.23
Ubuntu 18.04	2.27
Ubuntu 20.04	2.31
Ubuntu 21.04	2.33
CentOS 7 / RHEL 7.x	2.17
CentOS 8 / RockyLinux8 / RHEL 6.x	2.28
SLES 12 SP5	2.22
SLES 15 SP3	2.31

The releases are built on CentOS 7, which has the oldest GLIBC among currently supported distributions.