The buildbot seems to complain about `strcmp` function not available in the vfork patch (https://github.com/llvm/llvm-project/pull/81564): https://lab.llvm.org/buildbot/#/builders/68/builds/70093/steps/6/logs/stdio Unfortunately, I can't reproduce the failure on my linux machine so this is a guessing fix. If anyone has a way to reproduce and very this fix, please feel free to merge this change. Co-authored-by: jeffreytan81 <jeffreytan@fb.com>