https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106328
--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> --- > Ah, indeed. That still leaves the question whether we execute the > WPA stage with the FDs open - I suppose you checked? Yes, I can confirm it correctly works on Linux with FDs provided by jobserver. > And whether > pex_* "properly" does this for all host OSs (how does make jobserver > work on mingw/cygwin?). Based on the testing of Tamar, it also uses --jobserver-auth=3,4 on MinGW. > I wonder because Honza once said he didn't > implement jobserver support because it would require more fiddling > to get it actually work. I asked him and he didn't remember any details. > > And IIRC BSD 'make' is not GNU make but I think gmake is available > from the ports repo. The documentation about -flto=jobserver mentions > that already.