Unrelated but I've also been working to have the Linux toolchain to be updated to (at least) LLVM 14 (ebpfpub use of LLVM APIs needed to be updated too). I will also try with an even newer version, but I recall testing with LLVM 15 back then and there were some weird ELF issues that I assumed were due to us using a very old glibc. Will see. The idea is to get C++20. The glibc can and should still be updated to the CentOS 7 version eventually (along with reconfiguring the various libs); that might be necessary for the even newer versions of LLVM.

While trying newer LLVM did you see any stdlib header include issues like that jerk on github was complaining about?

Nope, but it can really be hit and miss