Comment 14 for bug 1478367

Ah, I see this in the debian/changelog file for the glibmm package:

glibmm2.4 (2.45.41.is.2.44.0-0ubuntu1) wily; urgency=medium

  * Revert 2.45 update - it requires everything to be built using C++11

 -- Robert Ancell <email address hidden> Fri, 31 Jul 2015 15:46:18 +1200

I don't understand that and I wish someone had actually talked to upstream glibmm. The need for C++11 at compile time has no effect whatsoever on already-built applications and is easy to deal with when building applications. The next version of gcc will actually use C++11 by default.