> is llvm39 still the one to be used? I still use +llvm39
$ port -v installed | grep ld64 ld64 @3_1+universal-ld64_127-ld64_236-ld64_97 (active) platform='darwin 10' archs='i386 x86_64' date='2018-09-20T16:56:39-0700' ld64-latest @274.2_2+llvm39+universal-llvm34 (active) platform='darwin 10' archs='i386 x86_64' date='2017-11-26T13:19:27-0800' One thing you learn in this, is to be current but not too current. There is no benefit to trying to ride the dragon's tale here -- you just run into a lot of new errors that haven't been dealt with yet. llvm3.9 is about equal to Sierra. That's a pretty good spot. I haven't really tried anything newer yet. I was configured to use clang-3.9 as my primary compiler up until a few weeks ago, when I fixed clang-5.0+ to enable thread_local storage, and so have just recently set clang-5.0 as my default compiler. Ken
