If I understand it correctly glibc is on a mix of 2 and 3, 3 on 64-bit systems and 2 on 32-bit systems. Though I am not certain 64-bit supports 32-bit time so

If I understand it correctly glibc is on a mix of 2 and 3, 3 on 64-bit systems and 2 on 32-bit systems. Though I am not certain 64-bit supports 32-bit time so it may be on 4 there already I am basing this of these two sites and a quick look at the source code though there may be better documentation on it https://sourceware.org/glibc/wiki/Y2038ProofnessDesign https://sourceware.org/glibc/wiki/Y2038ProofnessDesign https://www.gnu.org/software/libc/manual/html_node/64_002dbit-time-symbol-handling.html https://www.gnu.org/software/libc/manual/html_node/64_002dbi...