I got an email https://mails.dpdk.org/archives/test-report/2024-April/653931.html making clear that my patch set failed on CentOS 7, with GCC 4.8.5. GCC 4.8.5 is not supported. Why are the tests still run with this compiler? In this case, compilation failed since GCC 4.8.5 doesn't support C11 _Generic.