    // If you are compiling dlib as a shared library and installing it somewhere on your system
    // then it is important that any programs that use dlib agree on the state of the
    // DLIB_ASSERT statements (i.e. they are either always on or always off).  Therefore,
    // uncomment one of the following lines to force all DLIB_ASSERTs to either always on or
    // always off.  If you don't define one of these two macros then DLIB_ASSERT will toggle
    // automatically depending on the state of certain other macros, which is not what you want
    // when creating a shared library.
    //#define ENABLE_ASSERTS       // asserts always enabled
    //#define DLIB_DISABLE_ASSERTS // asserts always disabled

    //#define DLIB_ISO_CPP_ONLY
    //#define DLIB_NO_GUI_SUPPORT
    //#define DLIB_ENABLE_STACK_TRACE

    // You should also consider telling dlib to link against libjpeg, libpng, libgif, fftw, CUDA,
    // and a BLAS and LAPACK library.  To do this you need to uncomment the following #defines.
    // #define DLIB_JPEG_SUPPORT
    // #define DLIB_PNG_SUPPORT
    // #define DLIB_GIF_SUPPORT
    // #define DLIB_USE_FFTW
    // #define DLIB_USE_BLAS
    // #define DLIB_USE_LAPACK
    // #define DLIB_USE_CUDA