On Wed, 18 Oct 2017 16:51:37 +0200 FX <fxcoud...@gmail.com> wrote: > Parallel builds of libstdc++ on APFS filesystem (with 1 ns granularity) on > macOS 10.13 often fail > (failure rate for “make -j2” to “make -j8” is about 60% from my own builds > and results reported > by others): https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797 This is > reproducible with several > versions of GNU make. > > Changing libstdc++’s makefile to mark install-headers with .NOTPARALLEL fixes > the issue. We've > carried that patch in Homebrew (https://brew.sh) for a few months now, and > have had no report of > build issues since then. > > Bootstrapped and regtested on x86_64-apple-darwin17 (as well as other > platforms). OK to commit? > > FX > >
From supplied info not follow that problem is on gcc build side. I can suspect that APFS has problem with direntry intensive modification, for example. -- - ptr
