Hi, We're using Cygwin make to build several projects in parallel mode, e.g. with -j 4 or sometimes higher settings, depending on the core count of the machine.
Sporadically, and then I'm talking about "once a week" or so, random jobs will fail with a non-repeatable error, and in _every_ case these failures are preceded by a warning from make: make[4]: warning: jobserver unavailable: using -j1. Add '+' to parent make rule. Obviously the "Add '+' to parent rule" is nonsensical, since simply running exactly the same job again almost always works fine. But there is something flaky about make's jobserver under Windows. FWIW one machine I just observed this on has the make-4.4.1-2 package, which should use the "pipe" jobserver, if I interpret https://cygwin.com/pipermail/cygwin-announce/2023-March/010972.html correctly. Does anybody know a way to further debug this issue? It must be some rare race condition... -Dimitry -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
