glibmm 2.45.40 requires C++11, both for its own build and by any apps that use it. gtkmm also now requires C++11.
I think you are seeing a symptom of building the application without C++11 support. For instance, using CXXFLAGS="--std=c++11", though you'd be better of using an m4 macro such as AX_CXX_COMPILE_STDCXX_11().
glibmm 2.45.40 requires C++11, both for its own build and by any apps that use it. gtkmm also now requires C++11.
I think you are seeing a symptom of building the application without C++11 support. For instance, using CXXFLAGS= "--std= c++11", though you'd be better of using an m4 macro such as AX_CXX_ COMPILE_ STDCXX_ 11().