vigra 1.11.0: requires C++11

[mojca (Mojca Miklavec)]

Vigra 1.11.0 requires C++11 to build. This should probably be indicated by using

PortGroup cxx11 1.0

in the port and then any compiler blacklisting can be removed as well.

Please note that I didn't test whether that would actually work on a libc++-based installation on an old OS X.

It would also be nice if the official build instructions would mention that C++11 is required. I checked, but there is no mention of C++11 anywhere. The ​build instructions say just:

It should work with any standard conforming C++ compiler on both 32-bit and 64-bit machines.

(I now installed version 1.9.0 on an old OS X for the sake of testing hugin-app.)

[macports@…]

Cc Me!

[dbevans (David B. Evans)]

See also #51093 for build error when using libc++ on Yosemite.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

In 113b689665316dcc7a1889bdfe28290a66fd60e4/macports-ports:

vigra: use cxx11 PortGroup

Fixes #51046
Fixes #51247
No revbump since port either builds correctly or not at all