Here is what I get
17N68:~> cd
'/home/coulbois/programmes/sage/cmi-sage/local/var/tmp/sage/build/matplotlib-1.5.1.p0/src'
&& '/home/coulbois/programmes/sage/cmi-sage/sage' --python setup.py --name
============================================================================
Edit setup.cfg to change the build options
BUILDING MATPLOTLIB
matplotlib: yes [1.5.1]
python: yes [2.7.13 (default, Jun 15 2017, 16:43:35) [GCC
5.4.0]]
platform: yes [linux2]
REQUIRED DEPENDENCIES AND EXTENSIONS
numpy: yes [version 1.11.1]
dateutil: yes [using dateutil version 2.5.3]
pytz: yes [using pytz version 2016.4]
cycler: yes [using cycler version 0.10.0]
tornado: yes [using tornado version 4.3]
pyparsing: yes [using pyparsing version 2.1.5]
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: yes [version 1.2.51]
qhull: yes [pkg-config information for 'qhull' could not be
found. Using local copy.]
OPTIONAL SUBPACKAGES
sample_data: yes [installing]
toolkits: yes [installing]
OPTIONAL BACKEND EXTENSIONS
macosx: no [skipping due to configuration]
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 [skipping due to configuration]
tkagg: no [skipping due to configuration]
wxagg: no [skipping due to configuration]
gtk: no [skipping due to configuration]
agg: yes [installing]
cairo: no [cairocffi or pycairo not found]
windowing: no [skipping due to configuration]
OPTIONAL LATEX DEPENDENCIES
dvipng: no
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]
============================================================================
* The following required packages can not be built:
* freetype
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