https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
--- Comment #11 from Jürgen Reuter <juergen.reuter at desy dot de> --- (In reply to Iain Sandoe from comment #10) > In the short-term, I'd suggest picking up the previous version of Xcode > command line tools [e.g.10.1] (from developer.apple.com) and using the SDK > from that? While this gets fixed. with "while this gets fixed" you mean waiting for an update from the Apple side (like an XCode 10.2.1 update or so), or a 'proper' fix from the gcc side? And if it is a fix from the Apple side, how will I know that an update contains the desired fix?