Install fails when installing matplotlib

[JRMeyer]

>>> normandantzig1
[September 6, 2019, 6:35pm]

Here is error: slash
Edit setup.cfg to change the build options

BUILDING MATPLOTLIB slash
matplotlib: yes slash [2.0.2 slash ] slash
python: yes slash [3.7.3 (default, Mar 27 2019, 17:13:21) slash [MSC slash
v.1915 64 bit (AMD64) slash ] slash ] slash
platform: yes slash [win32 slash ]

REQUIRED DEPENDENCIES AND EXTENSIONS slash
numpy: yes slash [version 1.15.4 slash ] slash
six: yes slash [using six version 1.12.0 slash ] slash
dateutil: yes slash [using dateutil version 2.8.0 slash ] slash
functools32: yes slash [Not required slash ] slash
subprocess32: yes slash [Not required slash ] slash
pytz: yes slash [using pytz version 2018.9 slash ] slash
cycler: yes slash [using cycler version 0.10.0 slash ] slash
tornado: yes slash [using tornado version 6.0.2 slash ] slash
pyparsing: yes slash [using pyparsing version 2.3.1 slash ] slash
libagg: yes slash [pkg-config information for 'libagg' could not slash
be found. Using local copy. slash ] slash
freetype: no slash [The C/C++ header for freetype (ft2build.h) slash
could not be found. You may need to install the slash
development package. slash ] slash
png: no slash [The C/C++ header for png (png.h) could not be slash
found. You may need to install the development slash
package. slash ] slash
qhull: yes slash [pkg-config information for 'qhull' could not be slash
found. Using local copy. slash ]

OPTIONAL SUBPACKAGES slash
sample_data: yes slash [installing slash ] slash
toolkits: yes slash [installing slash ] slash
tests: no slash [skipping due to configuration slash ] slash
toolkits_tests: no slash [skipping due to configuration slash ]

OPTIONAL BACKEND EXTENSIONS slash
macosx: no slash [Mac OS-X only slash ] slash
qt5agg: yes slash [installing, Qt: 5.9.6, PyQt: 5.9.6 slash ] slash
qt4agg: no slash [PySide not found; PyQt4 not found slash ] slash
gtk3agg: yes slash [installing, unknown (can not use slash
multiprocessing to determine) slash ] slash
gtk3cairo: yes slash [installing, unknown (can not use slash
multiprocessing to determine) slash ] slash
gtkagg: no slash [Requires pygtk slash ] slash
tkagg: yes slash [installing; run-time loading from Python Tcl / slash
Tk slash ] slash
wxagg: no slash [requires wxPython slash ] slash
gtk: no slash [Requires pygtk slash ] slash
agg: yes slash [installing slash ] slash
cairo: no slash [cairocffi or pycairo not found slash ] slash
windowing: yes slash [installing slash ]

OPTIONAL LATEX DEPENDENCIES slash
dvipng: no slash
ghostscript: no slash
latex: no slash
pdftops: no

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

============================================================================ slash
slash curl-run-all.sh discourse.mozilla.org html-to-markdown.sh ordered-posts ordered-posts~ TTS.cdx tts.commands tts-emails.txt TTS.pages tts-telegram.txt TTS.warc.gz The following required packages can not be built: slash
slash curl-run-all.sh discourse.mozilla.org html-to-markdown.sh ordered-posts ordered-posts~ TTS.cdx tts.commands tts-emails.txt TTS.pages tts-telegram.txt TTS.warc.gz freetype, png

I have tried installing freetype and png with PIP and Conda.

I am at the border of beginner and intermediate with Python.

[This is an archived TTS discussion thread from discourse.mozilla.org/t/install-fails-when-installing-matplotlib]

[JRMeyer]

>>> nmstoker
[October 4, 2019, 2:32am]

- not sure
if you got further with this, but in case not or if it's useful to
others, the Matplotlib repo's install page details how to install
freetype and libpng. This isn't really anything to do with TTS but I
happened to find the answer so thought I'd share it.

Key issue you seem to have had is assuming they were Python packages
(they're not)

As you're on a Mac see the section for building for it here:

github.com

#### matplotlib/matplotlib/blob/master/INSTALL.rst slash #building-on-macos

==========
Installing
==========

.. note::

If you wish to contribute to the project, it's recommended you
:ref:install the latest development version<install_from_source>.

.. contents::

Installing an official release
==============================

Matplotlib and its dependencies are available as wheel packages for macOS,
Windows and Linux distributions::

python -m pip install -U pip
python -m pip install -U matplotlib

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