On Oct 18, 2017, at 7:51 AM, 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?
The patch seems like a rough bandaid to hide the real bug. Better to identify the real bug. If there is a missing dependency, then I'd like to think that adding the right dependency should resolve the issue.
