Detecting C++11 capabilities did not work on OSX 10.11.6, XCode 7.3.1, Apple LLVM 7.3.0, cmake 3.6.1. First check revealed that CMAKE_CXX_KNOWN_FEATURES was empty, so subsequent matches failed. After reading http://public.kitware.com/pipermail/cmake/2014-November/059182.html changed handling to fetch property instead of relying on variable. Works on my machine.

older versions of Visual Studio.  This is because C++11 support is too bad in older versions
of Visual Studio.

what it was when this example was trained (since I just modified the default
value in dlib to something else).

code a little.

batch normalization running stats window size from 1000 to 100.

instead of rectangle.

attendant objects.  Also fixed a minor bug in the loss layer.

image.

that use std::vector in addition to dlib::array.

with the mapping functions necessary at each layer to support these routines.

visit_layers_range().

Add an overload of dnn_trainer::train_one_step that takes a pair of
iterators rather than a std::vector.

singular value of the input matrix rather than as an absolute tolerance.