Changing default cxx_stdlib to libc++

[Ken Cunningham]

> On Mar 11, 2018, at 06:06, db <iamsudo at gmail.com> wrote:
> 
>> On 11 Mar 2018, at 02:47, "Kenneth F. Cunningham" <ken.cunningham.webuse at gmail.com> wrote:
>>> On 2018-03-10, at 12:23 PM, db wrote:
>>> Except for building from source for minor versions and revbumps, especially large binaries, and for ports that have open defects. Oh well…
>> Well, everything for 10.6.8 users on MacPorts is about to get supremely better. Hard to be too upset about that!
> 
> I don't doubt that! What I don't understand is, why would port be allowed to build a port from source on a certain system that already failed on the buildbot, and what's worse, be left with a port in a non-working state, while downloading binaries would work, because it couldn't donwload something that's failed to build.

You can sent your buildfromsource value to "never" I believe .... would that do what you're asking?

K