直接使用sudo easy_install matplotlib 报错

============================================================================
Edit setup.cfg to change the build options

BUILDING MATPLOTLIB
            matplotlib: yes [1.3.1]
                python: yes [2.7.6 (default, Mar 22 2014, 22:59:56)  [GCC
                        4.8.2]]
              platform: yes [linux2]

REQUIRED DEPENDENCIES AND EXTENSIONS
                 numpy: yes [version 1.8.1]
              dateutil: yes [dateutil was not found. It is required for date
                        axis support. pip/easy_install may 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.]
                 pycxx: yes [Couldn't import.  Using local copy.]
                libagg: yes [pkg-config information for 'libagg' could not
                        be found. Using local copy.]
              freetype: no  [pkg-config information for 'freetype2' could
                        not be found.]
                   png: yes [pkg-config information for 'libpng' could not
                        be found. Using unknown version.]

OPTIONAL SUBPACKAGES
           sample_data: yes [installing]
              toolkits: yes [installing]
                 tests: yes [nose 0.11.1 or later is required to run the
                        matplotlib test suite]

OPTIONAL BACKEND EXTENSIONS
                macosx: no  [Mac OS-X only]
                qt4agg: yes [installing, Qt: 4.8.6, PyQt4: 4.10.4]
               gtk3agg: yes [installing, version 3.8.10]
             gtk3cairo: yes [installing, version 3.8.10]
                gtkagg: no  [The C/C++ header for gtk (gtk/gtk.h) could not
                        be found.  You may need to install the development
                        package.]
                 tkagg: no  [TKAgg requires Tkinter.]
                 wxagg: no  [requires wxPython]
                   gtk: no  [The C/C++ header for gtk (gtk/gtk.h) could not
                        be found.  You may need to install the development
                        package.]
                   agg: yes [installing]
                 cairo: yes [installing, version 1.8.8]
             windowing: no  [Microsoft Windows only]

OPTIONAL LATEX DEPENDENCIES
                dvipng: no
           ghostscript: yes [version 9.10]
                 latex: no
               pdftops: yes [version 0.24.5]

============================================================================
                        * The following required packages can not be built:
                        * freetype
error: Setup script exited with 1

几个依赖关系不好找，各自是numpy tornado pyparsing freetye png

sudo easy_install numpy

sudo easy_install tornado

sudo easy_install pyparsing
sudo apt-get install libfreetype6
sudo apt-get install libpng12-dev

?sudo easy_install matplotlib