https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106162
--- Comment #6 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #2) > (In reply to Sergei Trofimovich from comment #0) > > There is a race condition when (I speculate) libstdcv++v3 is built in > > parallel from different 'make' processes. Perhaps for c++98 | c++11 | x++17 > > instances? > > There are no such instances. It is built separately for each multilib, but > each of those has its own $host_builddir Aha, TIL! > Are you 100% sure you didn't actually run multiple make processes yourself, > e.g by using & instead of && in a shell command? I was running it from a standard build script. Should be just 'make -j16 -l16' (with a small caveat: make is built with --shuffle support to reorder what what is allowed to expose missing depends: https://savannah.gnu.org/bugs/index.php?62100). (In reply to Jonathan Wakely from comment #5) > Created attachment 53236 [details] > Add missing prerequisite to generated header > > I'm testing this. Thank you! I'll also give it a go locally and will complain if it fails in a similar way.
