Zabbix

...GI..PS. [ZBX-25140] made configure reject TLS unaware compilers

Thread-local storage was standardized in C99. Since Zabbix 6.4,
thread-local storage is no longer optional for the server and proxy.
The agent can build without it, but the standard is 25 years old at this
point. If the user elects to build with a non-conformant compiler,
they're on their own.