(matplotlib) matplotlib$ python3.5 setup.py build
============================================================================
Edit setup.cfg to change the build options

BUILDING MATPLOTLIB
        matplotlib: yes [2.0.0b3+1919.g2dfef6a]
            python: yes [3.5.1+ (default, Mar 30 2016, 22:46:26)  [GCC
                    5.3.1 20160330]]
          platform: yes [linux]

REQUIRED DEPENDENCIES AND EXTENSIONS
             numpy: yes [version 1.11.1]
               six: yes [using six version 1.10.0]
          dateutil: yes [using dateutil version 2.5.3]
       functools32: yes [Not required]
      subprocess32: yes [Not required]
              pytz: yes [using pytz version 2016.6.1]
            cycler: yes [using cycler version 0.10.0]
           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 [using pyparsing version 2.1.5]
            libagg: yes [pkg-config information for 'libagg' could not
                    be found. Using local copy.]
          freetype: yes [Using local version for testing]
               png: yes [version 1.2.54]
             qhull: yes [pkg-config information for 'qhull' could not be
                    found. Using local copy.]

OPTIONAL SUBPACKAGES
       sample_data: yes [installing]
          toolkits: yes [installing]
             tests: yes [using nose version 1.3.7 / using unittest.mock]
    toolkits_tests: yes [using nose version 1.3.7 / using unittest.mock]

OPTIONAL BACKEND EXTENSIONS
            macosx: no  [Mac OS-X only]
            qt5agg: yes [installing, Qt: 5.7.0, PyQt: 5.7.0; PySide2 not
                    found]
            qt4agg: yes [installing, Qt: 5.5.1, PyQt: 5.5.1; PySide 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: yes [version 1.15]
       ghostscript: yes [version 9.18]
             latex: yes [version 3.14159265]
           pdftops: yes [version 0.41.0]

OPTIONAL PACKAGE DATA
              dlls: no  [skipping due to configuration]

running build
running build_py
copying lib/matplotlib/mpl-data/matplotlibrc -> build/lib.linux-x86_64-3.5/matplotlib/mpl-data
UPDATING build/lib.linux-x86_64-3.5/matplotlib/_version.py
set build/lib.linux-x86_64-3.5/matplotlib/_version.py to '2.0.0b3+1919.g2dfef6a'
running build_ext
(matplotlib) matplotlib$ PYTHONPATH=build/lib.linux-x86_64-3.5/ python3.5 tests.py --nocapture
Python byte-compilation optimization level: 0
/home/herbert/Repositories/matplotlib/build/lib.linux-x86_64-3.5/matplotlib/__init__.py:1580: UserWarning: matplotlib is not built with the correct FreeType version to run tests.  Set local_freetype=True in setup.cfg and rebuild. Expect many image comparison failures below. Expected freetype version 2.6.1. Found freetype version 2.6.1. Freetype build type is not local
  "" if ft2font.__freetype_build_type__ == 'local' else "not "