[Python]matplotlibのインストールでこける件

matplotlibをpip経由で下記のようにインストールしようとしたらエラーが発生した。

pip install matplotlib

エラー内容は、

Collecting matplotlib
  Downloading matplotlib-2.0.0.tar.gz (53.2MB)
    100% |████████████████████████████████| 53.2MB 6.4kB/s 
    Complete output from command python setup.py egg_info:
    ============================================================================
    Edit setup.cfg to change the build options
    
    BUILDING MATPLOTLIB
                matplotlib: yes [2.0.0]
                    python: yes [2.7.10 (default, Jul 13 2015, 12:05:58)  [GCC
                            4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)]]
                  platform: yes [darwin]
    
    REQUIRED DEPENDENCIES AND EXTENSIONS
                     numpy: yes [version 1.12.0]
                       six: yes [six was not found.pip will attempt to install
                            it after matplotlib.]
                  dateutil: yes [dateutil was not found. It is required for date
                            axis support. pip/easy_install may attempt to
                            install it after matplotlib.]
               functools32: yes [functools32 was not found. It is required
                            forPython versions prior to 3.2]
              subprocess32: yes [subprocess32 was not found. It used  for Python
                            versions prior to 3.2 to improves functionality on
                            Linux and OSX]
                      pytz: yes [pytz was not found. pip will attempt to install
                            it after matplotlib.]
                    cycler: yes [cycler was not found. pip will attempt to
                            install it after matplotlib.]
                   tornado: yes [tornado was not found. It is required for the
                            WebAgg backend. pip/easy_install may attempt to
                            install it after matplotlib.]
                 pyparsing: yes [pyparsing was not found. It is required for
                            mathtext support. pip/easy_install may attempt to
                            install it after matplotlib.]
                    libagg: yes [pkg-config information for 'libagg' could not
                            be found. Using local copy.]
                  freetype: no  [The C/C++ header for freetype2 (ft2build.h)
                            could not be found.  You may need to install the
                            development package.]
                       png: no  [pkg-config information for 'libpng' could not
                            be found.]
                     qhull: yes [pkg-config information for 'qhull' could not be
                            found. Using local copy.]
    
    OPTIONAL SUBPACKAGES
               sample_data: yes [installing]
                  toolkits: yes [installing]
                     tests: no  [skipping due to configuration]
            toolkits_tests: no  [skipping due to configuration]
    
    OPTIONAL BACKEND EXTENSIONS
                    macosx: yes [installing, darwin]
                    qt5agg: no  [PyQt5 not found]
                    qt4agg: no  [PySide not found; PyQt4 not found]
                   gtk3agg: no  [Requires pygobject to be installed.]
                 gtk3cairo: no  [Requires cairocffi or pycairo to be installed.]
                    gtkagg: no  [Requires pygtk]
                     tkagg: yes [installing; run-time loading from Python Tcl /
                            Tk]
                     wxagg: no  [requires wxPython]
                       gtk: no  [Requires pygtk]
                       agg: yes [installing]
                     cairo: no  [cairocffi or pycairo not found]
                 windowing: no  [Microsoft Windows only]
    
    OPTIONAL LATEX DEPENDENCIES
                    dvipng: no
               ghostscript: no
                     latex: no
                   pdftops: no
    
    OPTIONAL PACKAGE DATA
                      dlls: no  [skipping due to configuration]
    
    ============================================================================
                            * The following required packages can not be built:
                            * freetype, png
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/s8/wb2ydvpd2cl7_kq5bgngt5j80000gn/T/pip-build-RXC5zs/matplotlib

というわけで、freetypeが入っていないため、エラーが発生していた模様。