Build fails on OS X with NumPy 1.9

The current Matplotlib master fails to build against NumPy 1.9, also from master. I get the following:

    /Library/Python/2.7/site-packages/numpy-1.9.0.dev_ff7d5f9-py2.7-macosx-10.9-intel.egg/numpy/core/include/numpy/npy_3kcompat.h:255: warning: deprecated conversion from string constant to ‘char*’
    src/ft2font.cpp: In member function ‘Py::Object FT2Image::py_write_bitmap(const Py::Tuple&)’:
    src/ft2font.cpp:195: warning: statement has no effect
    src/ft2font.cpp: In function ‘void close_file_callback(FT_StreamRec_*)’:
    src/ft2font.cpp:2144: warning: statement has no effect
    src/ft2font.cpp: In member function ‘int FT2Font::make_open_args(PyObject*, FT_Open_Args*)’:
    src/ft2font.cpp:2207: warning: deprecated conversion from string constant to ‘char*’
    src/ft2font.cpp:2207: warning: deprecated conversion from string constant to ‘char*’
    error: command 'gcc-4.2' failed with exit status 1

I generate new builds every couple of weeks, using the same script:

    cd ../matplotlib
    git pull
    sudo rm -rf build dist
    make -f make.custom binaries
    sudo easy_install -Z -N dist/*egg
    cp dist/*egg ../ScipySuperpack

This is the first time I have seen this failure. OS X 10.9.1, gcc 4.2.1.