building from source with libc++

[db]

On 24 Mar 2017, at 19:23, Ryan Schmidt <ryandesign at macports.org> wrote:
> I agree that ticket describes the error you encountered. It was closed because nobody could explain it and the problem went away for the reporter. You could re-open it and add your new information to it.

Re-open #52335 while it's for different OS and Xcode versions?

Fwiw, I could try building xorg-libX11 from source but with libstdc++, first.