That is really odd. I’ve upgraded to the latest snapshot and now I’m at #275, and after doing a pkg_add -uU and all I now have libc++.so.7 and libc++.so.5, but not the needed version 6 . Wow so this does seem really fragile after all if they keep changing around the C++ library like that. And my install was a clean stable 6.8 install from the website…
Maybe you’re right and this special OS should use a build-package-yourself-from-correct-versions scripts so that it doesn’t break like this.