On Mon, 2023-11-27 at 15:27 -0500, Dennis Clarke via Bug reports and discussion for GNU make wrote: > GNU Make 4.3
Is the failure repeatable? Have you tried it with the latest version of GNU Make? It certainly doesn't fail on my system (which is, obviously, also running x86_64 GNU/Linux). But, the output sync tests have in the past sometimes been sensitive to performance issues etc.
