On Mon, Oct 07, 2019 at 07:52:57AM +0000, Harrison, Nicholas M wrote: > > I wonder if you could help with an apparent bug in 9.2.01. That isn't a version number we ever used. > OSX 10.14.4 Mojave > gcc version : 9.2.01. (as distributed via homebrew) > > Building a library archive with “ar” produces the following error message > > ar -v -r lib.a a.o b.o > > Error running /usr/local/bin/ar: vfork And neither is "ar" part of the compiler. Ask the brew people? (I see you already did and they sent you here, but there is nothing we can help with). Segher