libMesh/libmesh — pull request #374 by jwpeterson (2014-10-06 15:43:11+00:00)
Title: Disable C++11 features when the user says --disable-cxx11

Clang 3.5.0 strangely supports some C++11 features even when you don't pass the `-std=c++11` flag. To avoid this potentially confusing situation, we simply don't run libmesh's configure tests for specific C++11 features when the user configures with `--disable-cxx11`.