Hi OS/X'ers, I see in rpython/translator/platform/darwin.py that we use only "clang" as the compiler on OS/X. There was some discussion in #pypy, as well as a proposal from Andrew Dalke to upgrade the gcc on the OS/X buildbot, which go along the lines of "clang is not necessarily always better than gcc on OS/X". So I would like that the RPython toolchain supports both choices. Please don't discuss clang-vs-gcc endlessly here, I'm sure there are people who think that clang is better than gcc and others that have the opposite view and both camps have strong opinions -- that's not the point and I don't honestly care. This e-mail is *only* about supporting both choices. Could someone on OS/X check that we can use gcc to translate pypy's? This can be checked by trying out a smaller example, like rpython/translator/goal/targetnopstandalone.py . What fixes do you need in darwin.py? Or simply pass some environment variable? Thanks! A bientôt, Armin.