development/python3-matplotlib: Added (Python 2D plotting library).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

5 files changed, 2085 insertions, 0 deletions

diff --git a/development/python3-matplotlib/README b/development/python3-matplotlib/README
new file mode 100644
index 000000000000..abb309d987a5
--- /dev/null
+++ b/development/python3-matplotlib/README
@@ -0,0 +1,22 @@
+Matplotlib strives to produce publication quality 2D graphics for
+interactive graphing, scientific publishing, user interface
+development and web application servers targeting multiple user
+interfaces and hardcopy output formats.  The 'pylab' mode
+of ipython uses matplotlib to emulate matlab graphics.
+
+This is the Python 3 version of matplotlib and can coexist with
+SBo's matplotlib package.
+
+NOTES: 1 - If you want to enable the optional subpackages tests
+           and toolkits_tests you need to install Python 3
+           versions of nose and mock before matplotlib. THESE
+           AREN'T YET AVAILABLE AS SLACKBUILDS!
+           To enable the above mentioned subpackages you have to
+           set the variables DISABLE_TESTS and DISABLE_TK_TESTS
+           respectively to "no".
+           toolkits_tests doesn't get installed, if test and/or
+           toolkits are disabled. The installation of toolkits is
+           done automatically.
+
+        2 - The python-dateutil and pytz dependencies must be
+            compiled with Python 3 support.
diff --git a/development/python3-matplotlib/python3-matplotlib.SlackBuild b/development/python3-matplotlib/python3-matplotlib.SlackBuild
new file mode 100644
index 000000000000..39b5426fe4d9
--- /dev/null
+++ b/development/python3-matplotlib/python3-matplotlib.SlackBuild
@@ -0,0 +1,113 @@
+#!/bin/sh
+
+# Slackware build script for the Python 3 version of matplotlib
+
+# Copyright 2011-2017 Serban Udrea <s.udrea@gsi.de>
+#                     Jeremy Hansen <jebrhansen+SBo -at- gmail.com>
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification,
+# is permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+# Written by Aleksandar Samardzic <asamardzic@gmail.com>
+# Updated to 0.99.1.2 by João Felipe Santos <joao.eel@gmail.com>
+# Patch for libpng borrowed from Arch Linux
+# Updated up to version 1.5.2 by Serban Udrea <S.Udrea@gsi.de>
+# Adapted for Python 3 by Jeremy Hansen
+
+PRGNAM=python3-matplotlib
+SRCNAM=matplotlib
+VERSION=${VERSION:-1.5.2}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+TARBALL_VERSION=${TARBALL_VERSION:-1.5.2} # Tarball sometimes has a wrong version number
+DISABLE_TESTS=${DISABLE_TESTS:-Y}
+DISABLE_TK_TESTS=${DISABLE_TK_TESTS:-Y}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=${PKG:-$TMP/package-$PRGNAM}
+OUTPUT=${OUTPUT:-/tmp}
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $SRCNAM-$TARBALL_VERSION
+tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
+cd $SRCNAM-$TARBALL_VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+# Use setup.cfg to decide about the optional subpackages tests and
+# toolkits_tests
+#
+cat setup.cfg.template > setup.cfg
+
+DISABLE_TESTS=$(echo "$DISABLE_TESTS"|cut -b 1|tr a-z A-Z)
+DISABLE_TK_TESTS=$(echo "$DISABLE_TK_TESTS"|cut -b 1|tr a-z A-Z)
+
+if [ "$DISABLE_TESTS" = "Y" ]
+then
+ sed -i "s|#tests = True|tests = False|" setup.cfg
+else
+ python3 -c "import nose, mock" > /dev/null 2>&1 || \
+ { echo "ERROR: Missing requirements nose and/or mock!" && exit 1; }
+fi
+
+if [ "$DISABLE_TK_TESTS" = "Y" ]
+then
+ sed -i "s|#toolkits_tests = auto|toolkits_tests = False|" setup.cfg
+elif [ "$DISABLE_TESTS" = "Y" ]
+then
+ echo "ERROR: Cannot enable toolkits_tests if tests are disabled!" && exit 1
+fi
+
+# Use modified setupext.py to make sure that the build process gets
+# interrupted if requirements are not fulfilled
+#
+cat "${CWD}/setupext.py" > setupext.py
+
+python3 setup.py install --root $PKG  # > ${CWD}/SETUP.OUTPUT 2>&1
+
+find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a CHANGELOG INSTALL $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
diff --git a/development/python3-matplotlib/python3-matplotlib.info b/development/python3-matplotlib/python3-matplotlib.info
new file mode 100644
index 000000000000..b75ab6176d86
--- /dev/null
+++ b/development/python3-matplotlib/python3-matplotlib.info
@@ -0,0 +1,10 @@
+PRGNAM="python3-matplotlib"
+VERSION="1.5.2"
+HOMEPAGE="http://matplotlib.org/"
+DOWNLOAD="https://pypi.python.org/packages/15/89/240b4ebcd63bcdde9aa522fbd2e13f0af3347bea443cb8ad111e3b4c6f3a/matplotlib-1.5.2.tar.gz"
+MD5SUM="66f35e55cc15455eb37b415ae51f1e51"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="numpy3 python-dateutil pytz python3-tornado python3-pyparsing python3-cycler"
+MAINTAINER="Serban Udrea"
+EMAIL="S.Udrea@gsi.de"
diff --git a/development/python3-matplotlib/setupext.py b/development/python3-matplotlib/setupext.py
new file mode 100644
index 000000000000..5a1939fa125e
--- /dev/null
+++ b/development/python3-matplotlib/setupext.py
@@ -0,0 +1,1921 @@
+from __future__ import print_function, absolute_import
+
+from distutils import sysconfig
+from distutils import version
+from distutils.core import Extension
+import glob
+import io
+import multiprocessing
+import os
+import re
+import subprocess
+import sys
+import warnings
+from textwrap import fill
+
+import versioneer
+
+
+PY3min = (sys.version_info[0] >= 3)
+PY32min = (PY3min and sys.version_info[1] >= 2 or sys.version_info[0] > 3)
+
+
+try:
+    from subprocess import check_output
+except ImportError:
+    # check_output is not available in Python 2.6
+    def check_output(*popenargs, **kwargs):
+        """
+        Run command with arguments and return its output as a byte
+        string.
+
+        Backported from Python 2.7 as it's implemented as pure python
+        on stdlib.
+        """
+        process = subprocess.Popen(
+            stdout=subprocess.PIPE, *popenargs, **kwargs)
+        output, unused_err = process.communicate()
+        retcode = process.poll()
+        if retcode:
+            cmd = kwargs.get("args")
+            if cmd is None:
+                cmd = popenargs[0]
+            error = subprocess.CalledProcessError(retcode, cmd)
+            error.output = output
+            raise error
+        return output
+
+
+if sys.platform != 'win32':
+    if not PY3min:
+        from commands import getstatusoutput
+    else:
+        from subprocess import getstatusoutput
+
+
+if PY3min:
+    import configparser
+else:
+    import ConfigParser as configparser
+
+
+# matplotlib build options, which can be altered using setup.cfg
+options = {
+    'display_status': True,
+    'verbose': False,
+    'backend': None,
+    'basedirlist': None
+    }
+
+
+setup_cfg = os.environ.get('MPLSETUPCFG', 'setup.cfg')
+if os.path.exists(setup_cfg):
+    if PY32min:
+        config = configparser.ConfigParser()
+    else:
+        config = configparser.SafeConfigParser()
+    config.read(setup_cfg)
+
+    try:
+        options['display_status'] = not config.getboolean("status", "suppress")
+    except:
+        pass
+
+    try:
+        options['backend'] = config.get("rc_options", "backend")
+    except:
+        pass
+
+    try:
+        options['basedirlist'] = [
+            x.strip() for x in
+            config.get("directories", "basedirlist").split(',')]
+    except:
+        pass
+else:
+    config = None
+
+
+def get_win32_compiler():
+    """
+    Determine the compiler being used on win32.
+    """
+    # Used to determine mingw32 or msvc
+    # This is pretty bad logic, someone know a better way?
+    for v in sys.argv:
+        if 'mingw32' in v:
+            return 'mingw32'
+    return 'msvc'
+win32_compiler = get_win32_compiler()
+
+
+def extract_versions():
+    """
+    Extracts version values from the main matplotlib __init__.py and
+    returns them as a dictionary.
+    """
+    with open('lib/matplotlib/__init__.py') as fd:
+        for line in fd.readlines():
+            if (line.startswith('__version__numpy__')):
+                exec(line.strip())
+    return locals()
+
+
+def has_include_file(include_dirs, filename):
+    """
+    Returns `True` if `filename` can be found in one of the
+    directories in `include_dirs`.
+    """
+    if sys.platform == 'win32':
+        include_dirs += os.environ.get('INCLUDE', '.').split(';')
+    for dir in include_dirs:
+        if os.path.exists(os.path.join(dir, filename)):
+            return True
+    return False
+
+
+def check_include_file(include_dirs, filename, package):
+    """
+    Raises an exception if the given include file can not be found.
+    """
+    if not has_include_file(include_dirs, filename):
+        raise CheckFailed(
+            "The C/C++ header for %s (%s) could not be found.  You "
+            "may need to install the development package." %
+            (package, filename))
+
+
+def get_base_dirs():
+    """
+    Returns a list of standard base directories on this platform.
+    """
+    if options['basedirlist']:
+        return options['basedirlist']
+
+    basedir_map = {
+        'win32': ['win32_static', ],
+        'darwin': ['/usr/local/', '/usr', '/usr/X11',
+                   '/opt/X11', '/opt/local'],
+        'sunos5': [os.getenv('MPLIB_BASE') or '/usr/local', ],
+        'gnu0': ['/usr'],
+        'aix5': ['/usr/local'],
+        }
+    return basedir_map.get(sys.platform, ['/usr/local', '/usr'])
+
+
+def get_include_dirs():
+    """
+    Returns a list of standard include directories on this platform.
+    """
+    include_dirs = [os.path.join(d, 'include') for d in get_base_dirs()]
+    include_dirs.extend(
+        os.environ.get('CPLUS_INCLUDE_PATH', '').split(os.pathsep))
+    return include_dirs
+
+
+def is_min_version(found, minversion):
+    """
+    Returns `True` if `found` is at least as high a version as
+    `minversion`.
+    """
+    expected_version = version.LooseVersion(minversion)
+    found_version = version.LooseVersion(found)
+    return found_version >= expected_version
+
+
+# Define the display functions only if display_status is True.
+if options['display_status']:
+    def print_line(char='='):
+        print(char * 76)
+
+    def print_status(package, status):
+        initial_indent = "%22s: " % package
+        indent = ' ' * 24
+        print(fill(str(status), width=76,
+                   initial_indent=initial_indent,
+                   subsequent_indent=indent))
+
+    def print_message(message):
+        indent = ' ' * 24 + "* "
+        print(fill(str(message), width=76,
+                   initial_indent=indent,
+                   subsequent_indent=indent))
+
+    def print_raw(section):
+        print(section)
+else:
+    def print_line(*args, **kwargs):
+        pass
+    print_status = print_message = print_raw = print_line
+
+
+# Remove the -Wstrict-prototypesoption, is it's not valid for C++
+customize_compiler = sysconfig.customize_compiler
+
+
+def my_customize_compiler(compiler):
+    retval = customize_compiler(compiler)
+    try:
+        compiler.compiler_so.remove('-Wstrict-prototypes')
+    except (ValueError, AttributeError):
+        pass
+    return retval
+
+sysconfig.customize_compiler = my_customize_compiler
+
+
+def make_extension(name, files, *args, **kwargs):
+    """
+    Make a new extension.  Automatically sets include_dirs and
+    library_dirs to the base directories appropriate for this
+    platform.
+
+    `name` is the name of the extension.
+
+    `files` is a list of source files.
+
+    Any additional arguments are passed to the
+    `distutils.core.Extension` constructor.
+    """
+    ext = DelayedExtension(name, files, *args, **kwargs)
+    for dir in get_base_dirs():
+        include_dir = os.path.join(dir, 'include')
+        if os.path.exists(include_dir):
+            ext.include_dirs.append(include_dir)
+        for lib in ('lib', 'lib64'):
+            lib_dir = os.path.join(dir, lib)
+            if os.path.exists(lib_dir):
+                ext.library_dirs.append(lib_dir)
+    ext.include_dirs.append('.')
+
+    return ext
+
+
+class PkgConfig(object):
+    """
+    This is a class for communicating with pkg-config.
+    """
+    def __init__(self):
+        """
+        Determines whether pkg-config exists on this machine.
+        """
+        if sys.platform == 'win32':
+            self.has_pkgconfig = False
+        else:
+            try:
+                self.pkg_config = os.environ['PKG_CONFIG']
+            except KeyError:
+                self.pkg_config = 'pkg-config'
+
+            self.set_pkgconfig_path()
+            status, output = getstatusoutput(self.pkg_config + " --help")
+            self.has_pkgconfig = (status == 0)
+            if not self.has_pkgconfig:
+                print("IMPORTANT WARNING:")
+                print(
+                    "    pkg-config is not installed.\n"
+                    "    matplotlib may not be able to find some of its dependencies")
+
+    def set_pkgconfig_path(self):
+        pkgconfig_path = sysconfig.get_config_var('LIBDIR')
+        if pkgconfig_path is None:
+            return
+
+        pkgconfig_path = os.path.join(pkgconfig_path, 'pkgconfig')
+        if not os.path.isdir(pkgconfig_path):
+            return
+
+        try:
+            os.environ['PKG_CONFIG_PATH'] += ':' + pkgconfig_path
+        except KeyError:
+            os.environ['PKG_CONFIG_PATH'] = pkgconfig_path
+
+    def setup_extension(self, ext, package, default_include_dirs=[],
+                        default_library_dirs=[], default_libraries=[],
+                        alt_exec=None):
+        """
+        Add parameters to the given `ext` for the given `package`.
+        """
+        flag_map = {
+            '-I': 'include_dirs', '-L': 'library_dirs', '-l': 'libraries'}
+
+        executable = alt_exec
+        if self.has_pkgconfig:
+            executable = (self.pkg_config + ' {0}').format(package)
+
+        use_defaults = True
+
+        if executable is not None:
+            command = "{0} --libs --cflags ".format(executable)
+
+            try:
+                output = check_output(command, shell=True,
+                                      stderr=subprocess.STDOUT)
+            except subprocess.CalledProcessError:
+                pass
+            else:
+                output = output.decode(sys.getfilesystemencoding())
+                use_defaults = False
+                for token in output.split():
+                    attr = flag_map.get(token[:2])
+                    if attr is not None:
+                        getattr(ext, attr).insert(0, token[2:])
+
+        if use_defaults:
+            basedirs = get_base_dirs()
+            for base in basedirs:
+                for include in default_include_dirs:
+                    dir = os.path.join(base, include)
+                    if os.path.exists(dir):
+                        ext.include_dirs.append(dir)
+                for lib in default_library_dirs:
+                    dir = os.path.join(base, lib)
+                    if os.path.exists(dir):
+                        ext.library_dirs.append(dir)
+            ext.libraries.extend(default_libraries)
+            return True
+
+        return False
+
+    def get_version(self, package):
+        """
+        Get the version of the package from pkg-config.
+        """
+        if not self.has_pkgconfig:
+            return None
+
+        status, output = getstatusoutput(
+            self.pkg_config + " %s --modversion" % (package))
+        if status == 0:
+            return output
+        return None
+
+
+# The PkgConfig class should be used through this singleton
+pkg_config = PkgConfig()
+
+
+class CheckFailed(Exception):
+    """
+    Exception thrown when a `SetupPackage.check` method fails.
+    """
+    pass
+
+
+class SetupPackage(object):
+    optional = False
+
+    def check(self):
+        """
+        Checks whether the dependencies are met.  Should raise a
+        `CheckFailed` exception if the dependency could not be met,
+        otherwise return a string indicating a version number or some
+        other message indicating what was found.
+        """
+        pass
+
+    def get_packages(self):
+        """
+        Get a list of package names to add to the configuration.
+        These are added to the `packages` list passed to
+        `distutils.setup`.
+        """
+        return []
+
+    def get_namespace_packages(self):
+        """
+        Get a list of namespace package names to add to the configuration.
+        These are added to the `namespace_packages` list passed to
+        `distutils.setup`.
+        """
+        return []
+
+    def get_py_modules(self):
+        """
+        Get a list of top-level modules to add to the configuration.
+        These are added to the `py_modules` list passed to
+        `distutils.setup`.
+        """
+        return []
+
+    def get_package_data(self):
+        """
+        Get a package data dictionary to add to the configuration.
+        These are merged into to the `package_data` list passed to
+        `distutils.setup`.
+        """
+        return {}
+
+    def get_extension(self):
+        """
+        Get a list of C extensions (`distutils.core.Extension`
+        objects) to add to the configuration.  These are added to the
+        `extensions` list passed to `distutils.setup`.
+        """
+        return None
+
+    def get_install_requires(self):
+        """
+        Get a list of Python packages that we require.
+        pip/easy_install will attempt to download and install this
+        package if it is not installed.
+        """
+        return []
+
+    def get_setup_requires(self):
+        """
+        Get a list of Python packages that we require at build time.
+        pip/easy_install will attempt to download and install this
+        package if it is not installed.
+        """
+        return []
+
+    def _check_for_pkg_config(self, package, include_file, min_version=None,
+                              version=None):
+        """
+        A convenience function for writing checks for a
+        pkg_config-defined dependency.
+
+        `package` is the pkg_config package name.
+
+        `include_file` is a top-level include file we expect to find.
+
+        `min_version` is the minimum version required.
+
+        `version` will override the found version if this package
+        requires an alternate method for that. Set version='unknown'
+        if the version is not known but you still want to disabled
+        pkg_config version check.
+        """
+        if version is None:
+            version = pkg_config.get_version(package)
+
+            if version is None:
+                raise CheckFailed(
+                    "pkg-config information for '%s' could not be found." %
+                    package)
+
+        if min_version == 'PATCH':
+            raise CheckFailed(
+                "Requires patches that have not been merged upstream.")
+
+        if min_version and version != 'unknown':
+            if (not is_min_version(version, min_version)):
+                raise CheckFailed(
+                    "Requires %s %s or later.  Found %s." %
+                    (package, min_version, version))
+
+        ext = self.get_extension()
+        if ext is None:
+            ext = make_extension('test', [])
+            pkg_config.setup_extension(ext, package)
+
+        check_include_file(
+            ext.include_dirs + get_include_dirs(), include_file, package)
+
+        return 'version %s' % version
+
+
+class OptionalPackage(SetupPackage):
+    optional = True
+    force = False
+    config_category = "packages"
+
+    @classmethod
+    def get_config(cls):
+        """
+        Look at `setup.cfg` and return one of ["auto", True, False] indicating
+        if the package is at default state ("auto"), forced by the user (case
+        insensitively defined as 1, true, yes, on for True) or opted-out (case
+        insensitively defined as 0, false, no, off for False).
+        """
+        conf = "auto"
+        if config is not None and config.has_option(cls.config_category, cls.name):
+            try:
+                conf = config.getboolean(cls.config_category, cls.name)
+            except ValueError:
+                conf = config.get(cls.config_category, cls.name)
+        return conf
+
+    def check(self):
+        """
+        Do not override this method!
+
+        For custom dependency checks override self.check_requirements().
+        Two things are checked: Configuration file and requirements.
+        """
+        # Check configuration file
+        conf = self.get_config()
+        # Default "auto" state or install forced by user
+        if conf in [True, 'auto']:
+            message = "installing"
+            # Set non-optional if user sets `True` in config
+            if conf is True:
+                self.optional = False
+        # Configuration opt-out by user
+        else:
+            # Some backend extensions (e.g. Agg) need to be built for certain
+            # other GUI backends (e.g. TkAgg) even when manually disabled
+            if self.force is True:
+                message = "installing forced (config override)"
+            else:
+                raise CheckFailed("skipping due to configuration")
+
+        # Check requirements and add extra information (if any) to message.
+        # If requirements are not met a CheckFailed should be raised in there.
+        additional_info = self.check_requirements()
+        if additional_info:
+            message += ", " + additional_info
+
+        # No CheckFailed raised until now, return install message.
+        return message
+
+    def check_requirements(self):
+        """
+        Override this method to do custom dependency checks.
+
+         - Raise CheckFailed() if requirements are not met.
+         - Return message with additional information, or an empty string
+           (or None) for no additional information.
+        """
+        return ""
+
+
+class OptionalBackendPackage(OptionalPackage):
+    config_category = "gui_support"
+
+
+class Platform(SetupPackage):
+    name = "platform"
+
+    def check(self):
+        return sys.platform
+
+
+class Python(SetupPackage):
+    name = "python"
+
+    def check(self):
+        major, minor1, minor2, s, tmp = sys.version_info
+
+        if major < 2:
+            raise CheckFailed(
+                "Requires Python 2.6 or later")
+        elif major == 2 and minor1 < 6:
+            raise CheckFailed(
+                "Requires Python 2.6 or later (in the 2.x series)")
+        elif major == 3 and minor1 < 1:
+            raise CheckFailed(
+                "Requires Python 3.1 or later (in the 3.x series)")
+
+        return sys.version
+
+
+class Matplotlib(SetupPackage):
+    name = "matplotlib"
+
+    def check(self):
+        return versioneer.get_version()
+
+    def get_packages(self):
+        return [
+            'matplotlib',
+            'matplotlib.backends',
+            'matplotlib.backends.qt_editor',
+            'matplotlib.compat',
+            'matplotlib.projections',
+            'matplotlib.axes',
+            'matplotlib.sphinxext',
+            'matplotlib.style',
+            'matplotlib.testing',
+            'matplotlib.testing.jpl_units',
+            'matplotlib.tri',
+            ]
+
+    def get_py_modules(self):
+        return ['pylab']
+
+    def get_package_data(self):
+        return {
+            'matplotlib':
+            [
+                'mpl-data/fonts/afm/*.afm',
+                'mpl-data/fonts/pdfcorefonts/*.afm',
+                'mpl-data/fonts/pdfcorefonts/*.txt',
+                'mpl-data/fonts/ttf/*.ttf',
+                'mpl-data/fonts/ttf/LICENSE_STIX',
+                'mpl-data/fonts/ttf/COPYRIGHT.TXT',
+                'mpl-data/fonts/ttf/README.TXT',
+                'mpl-data/fonts/ttf/RELEASENOTES.TXT',
+                'mpl-data/images/*.xpm',
+                'mpl-data/images/*.svg',
+                'mpl-data/images/*.gif',
+                'mpl-data/images/*.pdf',
+                'mpl-data/images/*.png',
+                'mpl-data/images/*.ppm',
+                'mpl-data/example/*.npy',
+                'mpl-data/matplotlibrc',
+                'backends/web_backend/*.*',
+                'backends/web_backend/jquery/js/*.min.js',
+                'backends/web_backend/jquery/css/themes/base/*.min.css',
+                'backends/web_backend/jquery/css/themes/base/images/*',
+                'backends/web_backend/css/*.*',
+                'backends/Matplotlib.nib/*',
+                'mpl-data/stylelib/*.mplstyle',
+             ]}
+
+
+class SampleData(OptionalPackage):
+    """
+    This handles the sample data that ships with matplotlib.  It is
+    technically optional, though most often will be desired.
+    """
+    name = "sample_data"
+
+    def get_package_data(self):
+        return {
+            'matplotlib':
+            [
+                'mpl-data/sample_data/*.*',
+                'mpl-data/sample_data/axes_grid/*.*',
+            ]}
+
+
+class Toolkits(OptionalPackage):
+    name = "toolkits"
+
+    def get_packages(self):
+        return [
+            'mpl_toolkits',
+            'mpl_toolkits.mplot3d',
+            'mpl_toolkits.axes_grid',
+            'mpl_toolkits.axes_grid1',
+            'mpl_toolkits.axisartist',
+            ]
+
+    def get_namespace_packages(self):
+        return ['mpl_toolkits']
+
+
+class Tests(OptionalPackage):
+    name = "tests"
+    nose_min_version = '0.11.1'
+
+    def check(self):
+        super(Tests, self).check()
+
+        msgs = []
+        msg_template = ('{package} is required to run the matplotlib test '
+                        'suite. Please install it with pip or your preferred'
+                        ' tool to run the test suite')
+
+        bad_nose = msg_template.format(
+            package='nose %s or later' % self.nose_min_version
+        )
+        try:
+            import nose
+            if is_min_version(nose.__version__, self.nose_min_version):
+                msgs += ['using nose version %s' % nose.__version__]
+            else:
+                msgs += [bad_nose]
+        except ImportError:
+            msgs += [bad_nose]
+
+        if sys.version_info >= (3, 3):
+            msgs += ['using unittest.mock']
+        else:
+            try:
+                import mock
+                msgs += ['using mock %s' % mock.__version__]
+            except ImportError:
+                msgs += [msg_template.format(package='mock')]
+
+        return ' / '.join(msgs)
+
+    def get_packages(self):
+        return [
+            'matplotlib.tests',
+            'matplotlib.sphinxext.tests',
+            ]
+
+    def get_package_data(self):
+        baseline_images = [
+            'tests/baseline_images/%s/*' % x
+            for x in os.listdir('lib/matplotlib/tests/baseline_images')]
+
+        return {
+            'matplotlib':
+            baseline_images +
+            [
+                'tests/mpltest.ttf',
+                'tests/test_rcparams.rc',
+                'tests/test_utf32_be_rcparams.rc',
+                'sphinxext/tests/tinypages/*.rst',
+                'sphinxext/tests/tinypages/*.py',
+                'sphinxext/tests/tinypages/_static/*',
+            ]}
+
+
+class Toolkits_Tests(Tests):
+    name = "toolkits_tests"
+
+    def check_requirements(self):
+        conf = self.get_config()
+        toolkits_conf = Toolkits.get_config()
+        tests_conf = Tests.get_config()
+
+        if conf is True:
+            Tests.force = True
+            Toolkits.force = True
+        elif conf == "auto" and not (toolkits_conf and tests_conf):
+            # Only auto-install if both toolkits and tests are set
+            # to be installed
+            raise CheckFailed("toolkits_tests needs 'toolkits' and 'tests'")
+        return ""
+
+    def get_packages(self):
+        return [
+            'mpl_toolkits.tests',
+            ]
+
+    def get_package_data(self):
+        baseline_images = [
+            'tests/baseline_images/%s/*' % x
+            for x in os.listdir('lib/mpl_toolkits/tests/baseline_images')]
+
+        return {'mpl_toolkits': baseline_images}
+
+    def get_namespace_packages(self):
+        return ['mpl_toolkits']
+
+
+class DelayedExtension(Extension, object):
+    """
+    A distutils Extension subclass where some of its members
+    may have delayed computation until reaching the build phase.
+
+    This is so we can, for example, get the Numpy include dirs
+    after pip has installed Numpy for us if it wasn't already
+    on the system.
+    """
+    def __init__(self, *args, **kwargs):
+        super(DelayedExtension, self).__init__(*args, **kwargs)
+        self._finalized = False
+        self._hooks = {}
+
+    def add_hook(self, member, func):
+        """
+        Add a hook to dynamically compute a member.
+
+        Parameters
+        ----------
+        member : string
+            The name of the member
+
+        func : callable
+            The function to call to get dynamically-computed values
+            for the member.
+        """
+        self._hooks[member] = func
+
+    def finalize(self):
+        self._finalized = True
+
+    class DelayedMember(property):
+        def __init__(self, name):
+            self._name = name
+
+        def __get__(self, obj, objtype=None):
+            result = getattr(obj, '_' + self._name, [])
+
+            if obj._finalized:
+                if self._name in obj._hooks:
+                    result = obj._hooks[self._name]() + result
+
+            return result
+
+        def __set__(self, obj, value):
+            setattr(obj, '_' + self._name, value)
+
+    include_dirs = DelayedMember('include_dirs')
+
+
+class Numpy(SetupPackage):
+    name = "numpy"
+
+    @staticmethod
+    def include_dirs_hook():
+        if sys.version_info[0] >= 3:
+            import builtins
+            if hasattr(builtins, '__NUMPY_SETUP__'):
+                del builtins.__NUMPY_SETUP__
+            import imp
+            import numpy
+            imp.reload(numpy)
+        else:
+            import __builtin__
+            if hasattr(__builtin__, '__NUMPY_SETUP__'):
+                del __builtin__.__NUMPY_SETUP__
+            import numpy
+            reload(numpy)
+
+        ext = Extension('test', [])
+        ext.include_dirs.append(numpy.get_include())
+        if not has_include_file(
+                ext.include_dirs, os.path.join("numpy", "arrayobject.h")):
+            warnings.warn(
+                "The C headers for numpy could not be found. "
+                "You may need to install the development package")
+
+        return [numpy.get_include()]
+
+    def check(self):
+        min_version = extract_versions()['__version__numpy__']
+        try:
+            import numpy
+        except ImportError:
+            raise CheckFailed(
+                    "could not be found" )
+        if not is_min_version(numpy.__version__, min_version):
+            raise CheckFailed(
+                "requires numpy %s or later to build.  (Found %s)" %
+                (min_version, numpy.__version__))
+
+        return 'version %s' % numpy.__version__
+
+    def add_flags(self, ext):
+        # Ensure that PY_ARRAY_UNIQUE_SYMBOL is uniquely defined for
+        # each extension
+        array_api_name = 'MPL_' + ext.name.replace('.', '_') + '_ARRAY_API'
+
+        ext.define_macros.append(('PY_ARRAY_UNIQUE_SYMBOL', array_api_name))
+        ext.add_hook('include_dirs', self.include_dirs_hook)
+
+        ext.define_macros.append(('NPY_NO_DEPRECATED_API',
+                                  'NPY_1_7_API_VERSION'))
+
+    def get_setup_requires(self):
+        return ['numpy>=1.6']
+
+    def get_install_requires(self):
+        return ['numpy>=1.6']
+
+
+class LibAgg(SetupPackage):
+    name = 'libagg'
+
+    def check(self):
+        self.__class__.found_external = True
+        try:
+            return self._check_for_pkg_config(
+                'libagg', 'agg2/agg_basics.h', min_version='PATCH')
+        except CheckFailed as e:
+            self.__class__.found_external = False
+            return str(e) + ' Using local copy.'
+
+    def add_flags(self, ext, add_sources=True):
+        if self.found_external:
+            pkg_config.setup_extension(ext, 'libagg')
+        else:
+            ext.include_dirs.append('extern/agg24-svn/include')
+            if add_sources:
+                agg_sources = [
+                    'agg_bezier_arc.cpp',
+                    'agg_curves.cpp',
+                    'agg_image_filters.cpp',
+                    'agg_trans_affine.cpp',
+                    'agg_vcgen_contour.cpp',
+                    'agg_vcgen_dash.cpp',
+                    'agg_vcgen_stroke.cpp',
+                    'agg_vpgen_segmentator.cpp'
+                    ]
+                ext.sources.extend(
+                    os.path.join('extern', 'agg24-svn', 'src', x) for x in agg_sources)
+
+
+class FreeType(SetupPackage):
+    name = "freetype"
+
+    def check(self):
+        if sys.platform == 'win32':
+            check_include_file(get_include_dirs(), 'ft2build.h', 'freetype')
+            return 'Using unknown version found on system.'
+
+        status, output = getstatusoutput("freetype-config --ftversion")
+        if status == 0:
+            version = output
+        else:
+            version = None
+
+        # Early versions of freetype grep badly inside freetype-config,
+        # so catch those cases. (tested with 2.5.3).
+        if version is None or 'No such file or directory\ngrep:' in version:
+            version = self.version_from_header()
+
+        # pkg_config returns the libtool version rather than the
+        # freetype version so we need to explicitly pass the version
+        # to _check_for_pkg_config
+        return self._check_for_pkg_config(
+            'freetype2', 'ft2build.h',
+            min_version='2.3', version=version)
+
+    def version_from_header(self):
+        version = 'unknown'
+        ext = self.get_extension()
+        if ext is None:
+            return version
+        # Return the first version found in the include dirs.
+        for include_dir in ext.include_dirs:
+            header_fname = os.path.join(include_dir, 'freetype.h')
+            if os.path.exists(header_fname):
+                major, minor, patch = 0, 0, 0
+                with open(header_fname, 'r') as fh:
+                    for line in fh:
+                        if line.startswith('#define FREETYPE_'):
+                            value = line.rsplit(' ', 1)[1].strip()
+                            if 'MAJOR' in line:
+                                major = value
+                            elif 'MINOR' in line:
+                                minor = value
+                            else:
+                                patch = value
+                return '.'.join([major, minor, patch])
+
+    def add_flags(self, ext):
+        pkg_config.setup_extension(
+            ext, 'freetype2',
+            default_include_dirs=[
+                'include/freetype2', 'freetype2',
+                'lib/freetype2/include',
+                'lib/freetype2/include/freetype2'],
+            default_library_dirs=[
+                'freetype2/lib'],
+            default_libraries=['freetype', 'z'])
+
+
+class FT2Font(SetupPackage):
+    name = 'ft2font'
+
+    def get_extension(self):
+        sources = [
+            'src/ft2font.cpp',
+            'src/ft2font_wrapper.cpp',
+            'src/mplutils.cpp'
+            ]
+        ext = make_extension('matplotlib.ft2font', sources)
+        FreeType().add_flags(ext)
+        Numpy().add_flags(ext)
+        return ext
+
+
+class Png(SetupPackage):
+    name = "png"
+
+    def check(self):
+        if sys.platform == 'win32':
+            check_include_file(get_include_dirs(), 'png.h', 'png')
+            return 'Using unknown version found on system.'
+
+        status, output = getstatusoutput("libpng-config --version")
+        if status == 0:
+            version = output
+        else:
+            version = None
+
+        try:
+            return self._check_for_pkg_config(
+                'libpng', 'png.h',
+                min_version='1.2', version=version)
+        except CheckFailed as e:
+            if has_include_file(get_include_dirs(), 'png.h'):
+                return str(e) + ' Using unknown version found on system.'
+            raise
+
+    def get_extension(self):
+        sources = [
+            'src/_png.cpp',
+            'src/mplutils.cpp'
+            ]
+        ext = make_extension('matplotlib._png', sources)
+        pkg_config.setup_extension(
+            ext, 'libpng', default_libraries=['png', 'z'],
+            alt_exec='libpng-config --ldflags')
+        Numpy().add_flags(ext)
+        return ext
+
+
+class Qhull(SetupPackage):
+    name = "qhull"
+
+    def check(self):
+        self.__class__.found_external = True
+        try:
+            return self._check_for_pkg_config(
+                'qhull', 'qhull/qhull_a.h', min_version='2003.1')
+        except CheckFailed as e:
+            self.__class__.found_pkgconfig = False
+            # Qhull may not be in the pkg-config system but may still be
+            # present on this system, so check if the header files can be
+            # found.
+            include_dirs = [
+                os.path.join(x, 'qhull') for x in get_include_dirs()]
+            if has_include_file(include_dirs, 'qhull_a.h'):
+                return 'Using system Qhull (version unknown, no pkg-config info)'
+            else:
+                self.__class__.found_external = False
+                return str(e) + ' Using local copy.'
+
+    def add_flags(self, ext):
+        if self.found_external:
+            pkg_config.setup_extension(ext, 'qhull',
+                                       default_libraries=['qhull'])
+        else:
+            ext.include_dirs.append('extern')
+            ext.sources.extend(glob.glob('extern/qhull/*.c'))
+
+
+class TTConv(SetupPackage):
+    name = "ttconv"
+
+    def get_extension(self):
+        sources = [
+            'src/_ttconv.cpp',
+            'extern/ttconv/pprdrv_tt.cpp',
+            'extern/ttconv/pprdrv_tt2.cpp',
+            'extern/ttconv/ttutil.cpp'
+            ]
+        ext = make_extension('matplotlib.ttconv', sources)
+        Numpy().add_flags(ext)
+        ext.include_dirs.append('extern')
+        return ext
+
+
+class Path(SetupPackage):
+    name = "path"
+
+    def get_extension(self):
+        sources = [
+            'src/py_converters.cpp',
+            'src/_path_wrapper.cpp'
+            ]
+
+        ext = make_extension('matplotlib._path', sources)
+        Numpy().add_flags(ext)
+        LibAgg().add_flags(ext)
+        return ext
+
+
+class Image(SetupPackage):
+    name = "image"
+
+    def get_extension(self):
+        sources = [
+            'src/_image.cpp',
+            'src/mplutils.cpp',
+            'src/_image_wrapper.cpp'
+            ]
+        ext = make_extension('matplotlib._image', sources)
+        Numpy().add_flags(ext)
+        LibAgg().add_flags(ext)
+        return ext
+
+
+class ContourLegacy(SetupPackage):
+    name = "contour_legacy"
+
+    def get_extension(self):
+        sources = [
+            "src/cntr.c"
+            ]
+        ext = make_extension('matplotlib._cntr', sources)
+        Numpy().add_flags(ext)
+        return ext
+
+
+class Contour(SetupPackage):
+    name = "contour"
+
+    def get_extension(self):
+        sources = [
+            "src/_contour.cpp",
+            "src/_contour_wrapper.cpp",
+            ]
+        ext = make_extension('matplotlib._contour', sources)
+        Numpy().add_flags(ext)
+        return ext
+
+
+class Delaunay(SetupPackage):
+    name = "delaunay"
+
+    def get_packages(self):
+        return ['matplotlib.delaunay']
+
+    def get_extension(self):
+        sources = ["_delaunay.cpp", "VoronoiDiagramGenerator.cpp",
+                   "delaunay_utils.cpp", "natneighbors.cpp"]
+        sources = [os.path.join('lib/matplotlib/delaunay', s) for s in sources]
+        ext = make_extension('matplotlib._delaunay', sources)
+        Numpy().add_flags(ext)
+        return ext
+
+
+class QhullWrap(SetupPackage):
+    name = "qhull_wrap"
+
+    def get_extension(self):
+        sources = ['src/qhull_wrap.c']
+        ext = make_extension('matplotlib._qhull', sources,
+                             define_macros=[('MPL_DEVNULL', os.devnull)])
+        Numpy().add_flags(ext)
+        Qhull().add_flags(ext)
+        return ext
+
+
+class Tri(SetupPackage):
+    name = "tri"
+
+    def get_extension(self):
+        sources = [
+            "lib/matplotlib/tri/_tri.cpp",
+            "lib/matplotlib/tri/_tri_wrapper.cpp",
+            "src/mplutils.cpp"
+            ]
+        ext = make_extension('matplotlib._tri', sources)
+        Numpy().add_flags(ext)
+        return ext
+
+
+class Externals(SetupPackage):
+    name = "externals"
+
+    def get_packages(self):
+        return ['matplotlib.externals']
+
+
+class Pytz(SetupPackage):
+    name = "pytz"
+
+    def check(self):
+        try:
+            import pytz
+        except ImportError:
+            raise CheckFailed(
+                    "could not be found")
+
+        return "using pytz version %s" % pytz.__version__
+
+    def get_install_requires(self):
+        return ['pytz']
+
+
+class Cycler(SetupPackage):
+    name = "cycler"
+
+    def check(self):
+        try:
+            import cycler
+        except ImportError:
+            raise CheckFailed(
+                "could not be found")
+
+        return "using cycler version %s" % cycler.__version__
+
+    def get_install_requires(self):
+        return ['cycler']
+
+
+class Dateutil(SetupPackage):
+    name = "dateutil"
+
+    def __init__(self, version=None):
+        self.version = version
+
+    def check(self):
+        try:
+            import dateutil
+        except ImportError:
+            # dateutil 2.1 has a file encoding bug that breaks installation on
+            # python 3.3
+            # https://github.com/matplotlib/matplotlib/issues/2373
+            # hack around the problem by installing the (working) v2.0
+            #major, minor1, _, _, _ = sys.version_info
+            #if self.version is None and (major, minor1) == (3, 3):
+                #self.version = '!=2.1'
+
+            raise CheckFailed (
+                    "could not be found")
+
+        major, minor1, _, _, _ = sys.version_info
+        if dateutil.__version__ == '2.1' and (major, minor1) == (3, 3):
+            raise CheckFailed (
+                    "dateutil v. 2.1 has a bug that breaks installation"
+                    "on python 3.3.x, use another dateutil version")
+        return "using dateutil version %s" % dateutil.__version__
+
+    def get_install_requires(self):
+        dateutil = 'python-dateutil'
+        if self.version is not None:
+            dateutil += self.version
+        return [dateutil]
+
+
+class Tornado(SetupPackage):
+    name = "tornado"
+
+    def check(self):
+        try:
+            import tornado
+        except ImportError:
+            raise CheckFailed (
+                    "could not be found")
+
+        return "using tornado version %s" % tornado.version
+
+
+class Pyparsing(SetupPackage):
+    name = "pyparsing"
+    # pyparsing 2.0.4 has broken python 3 support.
+    # pyparsing 2.1.2 is broken in python3.4/3.3.
+    def is_ok(self):
+        # pyparsing 2.0.0 bug, but it may be patched in distributions
+        try:
+            import pyparsing
+            f = pyparsing.Forward()
+            f <<= pyparsing.Literal('a')
+            return f is not None
+        except (ImportError, TypeError):
+            return False
+
+    def check(self):
+        try:
+            import pyparsing
+        except ImportError:
+            raise CheckFailed(
+                "could not be found")
+
+        required = [1, 5, 6]
+        if [int(x) for x in pyparsing.__version__.split('.')] < required:
+            raise CheckFailed(
+                "matplotlib requires pyparsing >= {0}".format(
+                    '.'.join(str(x) for x in required)))
+
+        if not self.is_ok():
+            return (
+                "Your pyparsing contains a bug that will be monkey-patched by "
+                "matplotlib.  For best results, upgrade to pyparsing 2.0.1 or "
+                "later.")
+
+        return "using pyparsing version %s" % pyparsing.__version__
+
+    def get_install_requires(self):
+        versionstring = 'pyparsing>=1.5.6,!=2.0.4,!=2.1.2'
+        if self.is_ok():
+            return [versionstring]
+        else:
+            return [versionstring + ',!=2.0.0']
+
+
+class BackendAgg(OptionalBackendPackage):
+    name = "agg"
+    force = True
+
+    def get_extension(self):
+        sources = [
+            "src/mplutils.cpp",
+            "src/py_converters.cpp",
+            "src/_backend_agg.cpp",
+            "src/_backend_agg_wrapper.cpp"
+            ]
+        ext = make_extension('matplotlib.backends._backend_agg', sources)
+        Numpy().add_flags(ext)
+        LibAgg().add_flags(ext)
+        FreeType().add_flags(ext)
+        return ext
+
+
+class BackendTkAgg(OptionalBackendPackage):
+    name = "tkagg"
+    force = True
+
+    def check(self):
+        return "installing; run-time loading from Python Tcl / Tk"
+
+    def get_extension(self):
+        sources = [
+            'src/py_converters.cpp',
+            'src/_tkagg.cpp'
+            ]
+
+        ext = make_extension('matplotlib.backends._tkagg', sources)
+        self.add_flags(ext)
+        Numpy().add_flags(ext)
+        LibAgg().add_flags(ext, add_sources=False)
+        return ext
+
+    def add_flags(self, ext):
+        ext.include_dirs.extend(['src'])
+        if sys.platform == 'win32':
+            # PSAPI library needed for finding Tcl / Tk at run time
+            ext.libraries.extend(['psapi'])
+
+
+class BackendGtk(OptionalBackendPackage):
+    name = "gtk"
+
+    def check_requirements(self):
+        try:
+            import gtk
+        except ImportError:
+            raise CheckFailed("Requires pygtk")
+        except RuntimeError:
+            raise CheckFailed('pygtk present, but import failed.')
+        else:
+            version = (2, 2, 0)
+            if gtk.pygtk_version < version:
+                raise CheckFailed(
+                    "Requires pygtk %d.%d.%d or later. "
+                    "Found %d.%d.%d" % (version + gtk.pygtk_version))
+
+        ext = self.get_extension()
+        self.add_flags(ext)
+        check_include_file(ext.include_dirs,
+                           os.path.join("gtk", "gtk.h"),
+                           'gtk')
+        check_include_file(ext.include_dirs,
+                           os.path.join("pygtk", "pygtk.h"),
+                           'pygtk')
+
+        return 'Gtk: %s pygtk: %s' % (
+            ".".join(str(x) for x in gtk.gtk_version),
+            ".".join(str(x) for x in gtk.pygtk_version))
+
+    def get_package_data(self):
+        return {'matplotlib': ['mpl-data/*.glade']}
+
+    def get_extension(self):
+        sources = [
+            'src/_backend_gdk.c'
+            ]
+        ext = make_extension('matplotlib.backends._backend_gdk', sources)
+        self.add_flags(ext)
+        Numpy().add_flags(ext)
+        return ext
+
+    def add_flags(self, ext):
+        if sys.platform == 'win32':
+            def getoutput(s):
+                ret = os.popen(s).read().strip()
+                return ret
+
+            if 'PKG_CONFIG_PATH' not in os.environ:
+                # If Gtk+ is installed, pkg-config is required to be installed
+                os.environ['PKG_CONFIG_PATH'] = 'C:\\GTK\\lib\\pkgconfig'
+
+                # popen broken on my win32 plaform so I can't use pkgconfig
+                ext.library_dirs.extend(
+                    ['C:/GTK/bin', 'C:/GTK/lib'])
+
+                ext.include_dirs.extend(
+                    ['win32_static/include/pygtk-2.0',
+                     'C:/GTK/include',
+                     'C:/GTK/include/gobject',
+                     'C:/GTK/include/gext',
+                     'C:/GTK/include/glib',
+                     'C:/GTK/include/pango',
+                     'C:/GTK/include/atk',
+                     'C:/GTK/include/X11',
+                     'C:/GTK/include/cairo',
+                     'C:/GTK/include/gdk',
+                     'C:/GTK/include/gdk-pixbuf',
+                     'C:/GTK/include/gtk',
+                     ])
+
+            pygtkIncludes = getoutput(
+                'pkg-config --cflags-only-I pygtk-2.0').split()
+            gtkIncludes = getoutput(
+                'pkg-config --cflags-only-I gtk+-2.0').split()
+            includes = pygtkIncludes + gtkIncludes
+            ext.include_dirs.extend([include[2:] for include in includes])
+
+            pygtkLinker = getoutput('pkg-config --libs pygtk-2.0').split()
+            gtkLinker = getoutput('pkg-config --libs gtk+-2.0').split()
+            linkerFlags = pygtkLinker + gtkLinker
+
+            ext.libraries.extend(
+                [flag[2:] for flag in linkerFlags if flag.startswith('-l')])
+
+            ext.library_dirs.extend(
+                [flag[2:] for flag in linkerFlags if flag.startswith('-L')])
+
+            ext.extra_link_args.extend(
+                [flag for flag in linkerFlags if not
+                 (flag.startswith('-l') or flag.startswith('-L'))])
+
+            # visual studio doesn't need the math library
+            if (sys.platform == 'win32' and
+                win32_compiler == 'msvc' and
+                'm' in ext.libraries):
+                ext.libraries.remove('m')
+
+        elif sys.platform != 'win32':
+            pkg_config.setup_extension(ext, 'pygtk-2.0')
+            pkg_config.setup_extension(ext, 'gtk+-2.0')
+
+
+class BackendGtkAgg(BackendGtk):
+    name = "gtkagg"
+
+    def check(self):
+        try:
+            return super(BackendGtkAgg, self).check()
+        except:
+            raise
+
+    def get_package_data(self):
+        return {'matplotlib': ['mpl-data/*.glade']}
+
+    def get_extension(self):
+        sources = [
+            'src/py_converters.cpp',
+            'src/_gtkagg.cpp',
+            'src/mplutils.cpp'
+            ]
+        ext = make_extension('matplotlib.backends._gtkagg', sources)
+        self.add_flags(ext)
+        LibAgg().add_flags(ext)
+        Numpy().add_flags(ext)
+        return ext
+
+
+def backend_gtk3agg_internal_check(x):
+    try:
+        import gi
+    except ImportError:
+        return (False, "Requires pygobject to be installed.")
+
+    try:
+        gi.require_version("Gtk", "3.0")
+    except ValueError:
+        return (False, "Requires gtk3 development files to be installed.")
+    except AttributeError:
+        return (False, "pygobject version too old.")
+
+    try:
+        from gi.repository import Gtk, Gdk, GObject
+    except (ImportError, RuntimeError):
+        return (False, "Requires pygobject to be installed.")
+
+    return (True, "version %s.%s.%s" % (
+        Gtk.get_major_version(),
+        Gtk.get_micro_version(),
+        Gtk.get_minor_version()))
+
+
+class BackendGtk3Agg(OptionalBackendPackage):
+    name = "gtk3agg"
+
+    def check_requirements(self):
+        if 'TRAVIS' in os.environ:
+            raise CheckFailed("Can't build with Travis")
+
+        # This check needs to be performed out-of-process, because
+        # importing gi and then importing regular old pygtk afterward
+        # segfaults the interpreter.
+        try:
+            p = multiprocessing.Pool()
+        except:
+            return "unknown (can not use multiprocessing to determine)"
+        try:
+            res = p.map_async(backend_gtk3agg_internal_check, [0])
+            success, msg = res.get(timeout=10)[0]
+        except multiprocessing.TimeoutError:
+            p.terminate()
+            # No result returned. Probaly hanging, terminate the process.
+            success = False
+            raise CheckFailed("Check timed out")
+        except:
+            p.close()
+            # Some other error.
+            success = False
+            msg = "Could not determine"
+            raise
+        else:
+            p.close()
+        finally:
+            p.join()
+
+        if success:
+            return msg
+        else:
+            raise CheckFailed(msg)
+
+    def get_package_data(self):
+        return {'matplotlib': ['mpl-data/*.glade']}
+
+
+def backend_gtk3cairo_internal_check(x):
+    try:
+        import cairocffi
+    except ImportError:
+        try:
+            import cairo
+        except ImportError:
+            return (False, "Requires cairocffi or pycairo to be installed.")
+
+    try:
+        import gi
+    except ImportError:
+        return (False, "Requires pygobject to be installed.")
+
+    try:
+        gi.require_version("Gtk", "3.0")
+    except ValueError:
+        return (False, "Requires gtk3 development files to be installed.")
+    except AttributeError:
+        return (False, "pygobject version too old.")
+
+    try:
+        from gi.repository import Gtk, Gdk, GObject
+    except (RuntimeError, ImportError):
+        return (False, "Requires pygobject to be installed.")
+
+    return (True, "version %s.%s.%s" % (
+        Gtk.get_major_version(),
+        Gtk.get_micro_version(),
+        Gtk.get_minor_version()))
+
+
+class BackendGtk3Cairo(OptionalBackendPackage):
+    name = "gtk3cairo"
+
+    def check_requirements(self):
+        if 'TRAVIS' in os.environ:
+            raise CheckFailed("Can't build with Travis")
+
+        # This check needs to be performed out-of-process, because
+        # importing gi and then importing regular old pygtk afterward
+        # segfaults the interpreter.
+        try:
+            p = multiprocessing.Pool()
+        except:
+            return "unknown (can not use multiprocessing to determine)"
+        try:
+            res = p.map_async(backend_gtk3cairo_internal_check, [0])
+            success, msg = res.get(timeout=10)[0]
+        except multiprocessing.TimeoutError:
+            p.terminate()
+            # No result returned. Probaly hanging, terminate the process.
+            success = False
+            raise CheckFailed("Check timed out")
+        except:
+            p.close()
+            success = False
+            raise
+        else:
+            p.close()
+        finally:
+            p.join()
+
+        if success:
+            return msg
+        else:
+            raise CheckFailed(msg)
+
+    def get_package_data(self):
+        return {'matplotlib': ['mpl-data/*.glade']}
+
+
+class BackendWxAgg(OptionalBackendPackage):
+    name = "wxagg"
+
+    def check_requirements(self):
+        wxversioninstalled = True
+        try:
+            import wxversion
+        except ImportError:
+            wxversioninstalled = False
+
+        if wxversioninstalled:
+            try:
+                _wx_ensure_failed = wxversion.AlreadyImportedError
+            except AttributeError:
+                _wx_ensure_failed = wxversion.VersionError
+
+            try:
+                wxversion.ensureMinimal('2.8')
+            except _wx_ensure_failed:
+                pass
+
+        try:
+            import wx
+            backend_version = wx.VERSION_STRING
+        except ImportError:
+            raise CheckFailed("requires wxPython")
+
+        # Extra version check in case wxversion lacks AlreadyImportedError;
+        # then VersionError might have been raised and ignored when
+        # there really *is* a problem with the version.
+        major, minor = [int(n) for n in backend_version.split('.')[:2]]
+        if major < 2 or (major < 3 and minor < 8):
+            raise CheckFailed(
+                "Requires wxPython 2.8, found %s" % backend_version)
+
+        return "version %s" % backend_version
+
+
+class BackendMacOSX(OptionalBackendPackage):
+    name = 'macosx'
+
+    def check_requirements(self):
+        if sys.platform != 'darwin':
+            raise CheckFailed("Mac OS-X only")
+
+        return 'darwin'
+
+    def get_extension(self):
+        sources = [
+            'src/_macosx.m',
+            'src/py_converters.cpp',
+            'src/path_cleanup.cpp'
+            ]
+
+        ext = make_extension('matplotlib.backends._macosx', sources)
+        Numpy().add_flags(ext)
+        LibAgg().add_flags(ext)
+        ext.extra_link_args.extend(['-framework', 'Cocoa'])
+        return ext
+
+
+class Windowing(OptionalBackendPackage):
+    """
+    Builds the windowing extension.
+    """
+    name = "windowing"
+
+    def check_requirements(self):
+        if sys.platform != 'win32':
+            raise CheckFailed("Microsoft Windows only")
+        config = self.get_config()
+        if config is False:
+            raise CheckFailed("skipping due to configuration")
+        return ""
+
+    def get_extension(self):
+        sources = [
+            "src/_windowing.cpp"
+            ]
+        ext = make_extension('matplotlib._windowing', sources)
+        ext.include_dirs.extend(['C:/include'])
+        ext.libraries.extend(['user32'])
+        ext.library_dirs.extend(['C:/lib'])
+        ext.extra_link_args.append("-mwindows")
+        return ext
+
+
+class BackendQtBase(OptionalBackendPackage):
+
+    def convert_qt_version(self, version):
+        version = '%x' % version
+        temp = []
+        while len(version) > 0:
+            version, chunk = version[:-2], version[-2:]
+            temp.insert(0, str(int(chunk, 16)))
+        return '.'.join(temp)
+
+    def check_requirements(self):
+        '''
+        If PyQt4/PyQt5 is already imported, importing PyQt5/PyQt4 will fail
+        so we need to test in a subprocess (as for Gtk3).
+        '''
+        try:
+            p = multiprocessing.Pool()
+
+        except:
+            # Can't do multiprocessing, fall back to normal approach ( this will fail if importing both PyQt4 and PyQt5 )
+            try:
+                # Try in-process
+                msg = self.callback(self)
+
+            except RuntimeError:
+                raise CheckFailed("Could not import: are PyQt4 & PyQt5 both installed?")
+
+            except:
+                # Raise any other exceptions
+                raise
+
+        else:
+            # Multiprocessing OK
+            try:
+                res = p.map_async(self.callback, [self])
+                msg = res.get(timeout=10)[0]
+            except multiprocessing.TimeoutError:
+                p.terminate()
+                # No result returned. Probaly hanging, terminate the process.
+                raise CheckFailed("Check timed out")
+            except:
+                # Some other error.
+                p.close()
+                raise
+            else:
+                # Clean exit
+                p.close()
+            finally:
+                # Tidy up multiprocessing
+                p.join()
+
+        return msg
+
+
+def backend_pyside_internal_check(self):
+    try:
+        from PySide import __version__
+        from PySide import QtCore
+    except ImportError:
+        raise CheckFailed("PySide not found")
+    else:
+        return ("Qt: %s, PySide: %s" %
+                (QtCore.__version__, __version__))
+
+
+def backend_pyqt4_internal_check(self):
+    try:
+        from PyQt4 import QtCore
+    except ImportError:
+        raise CheckFailed("PyQt4 not found")
+
+    try:
+        qt_version = QtCore.QT_VERSION
+        pyqt_version_str = QtCore.QT_VERSION_STR
+    except AttributeError:
+        raise CheckFailed('PyQt4 not correctly imported')
+    else:
+        return ("Qt: %s, PyQt: %s" % (self.convert_qt_version(qt_version), pyqt_version_str))
+
+
+def backend_qt4_internal_check(self):
+    successes = []
+    failures = []
+    try:
+        successes.append(backend_pyside_internal_check(self))
+    except CheckFailed as e:
+        failures.append(str(e))
+
+    try:
+        successes.append(backend_pyqt4_internal_check(self))
+    except CheckFailed as e:
+        failures.append(str(e))
+
+    if len(successes) == 0:
+        raise CheckFailed('; '.join(failures))
+    return '; '.join(successes + failures)
+
+
+class BackendQt4(BackendQtBase):
+    name = "qt4agg"
+
+    def __init__(self, *args, **kwargs):
+        BackendQtBase.__init__(self, *args, **kwargs)
+        self.callback = backend_qt4_internal_check
+
+
+def backend_qt5_internal_check(self):
+    try:
+        from PyQt5 import QtCore
+    except ImportError:
+        raise CheckFailed("PyQt5 not found")
+
+    try:
+        qt_version = QtCore.QT_VERSION
+        pyqt_version_str = QtCore.QT_VERSION_STR
+    except AttributeError:
+        raise CheckFailed('PyQt5 not correctly imported')
+    else:
+        return ("Qt: %s, PyQt: %s" % (self.convert_qt_version(qt_version), pyqt_version_str))
+
+
+class BackendQt5(BackendQtBase):
+    name = "qt5agg"
+
+    def __init__(self, *args, **kwargs):
+        BackendQtBase.__init__(self, *args, **kwargs)
+        self.callback = backend_qt5_internal_check
+
+
+class BackendCairo(OptionalBackendPackage):
+    name = "cairo"
+
+    def check_requirements(self):
+        try:
+            import cairocffi
+        except ImportError:
+            try:
+                import cairo
+            except ImportError:
+                raise CheckFailed("cairocffi or pycairo not found")
+            else:
+                return "pycairo version %s" % cairo.version
+        else:
+            return "cairocffi version %s" % cairocffi.version
+
+
+class DviPng(SetupPackage):
+    name = "dvipng"
+    optional = True
+
+    def check(self):
+        try:
+            output = check_output('dvipng -version', shell=True,
+                                  stderr=subprocess.STDOUT)
+            return "version %s" % output.splitlines()[1].decode().split()[-1]
+        except (IndexError, ValueError, subprocess.CalledProcessError):
+            raise CheckFailed()
+
+
+class Ghostscript(SetupPackage):
+    name = "ghostscript"
+    optional = True
+
+    def check(self):
+        try:
+            if sys.platform == 'win32':
+                command = 'gswin32c --version'
+                try:
+                    output = check_output(command, shell=True,
+                                          stderr=subprocess.STDOUT)
+                except subprocess.CalledProcessError:
+                    command = 'gswin64c --version'
+                    output = check_output(command, shell=True,
+                                          stderr=subprocess.STDOUT)
+            else:
+                command = 'gs --version'
+                output = check_output(command, shell=True,
+                                      stderr=subprocess.STDOUT)
+            return "version %s" % output.decode()[:-1]
+        except (IndexError, ValueError, subprocess.CalledProcessError):
+            raise CheckFailed()
+
+
+class LaTeX(SetupPackage):
+    name = "latex"
+    optional = True
+
+    def check(self):
+        try:
+            output = check_output('latex -version', shell=True,
+                                  stderr=subprocess.STDOUT)
+            line = output.splitlines()[0].decode()
+            pattern = '(3\.1\d+)|(MiKTeX \d+.\d+)'
+            match = re.search(pattern, line)
+            return "version %s" % match.group(0)
+        except (IndexError, ValueError, AttributeError, subprocess.CalledProcessError):
+            raise CheckFailed()
+
+
+class PdfToPs(SetupPackage):
+    name = "pdftops"
+    optional = True
+
+    def check(self):
+        try:
+            output = check_output('pdftops -v', shell=True,
+                                  stderr=subprocess.STDOUT)
+            for line in output.splitlines():
+                line = line.decode()
+                if 'version' in line:
+                    return "version %s" % line.split()[2]
+        except (IndexError, ValueError, subprocess.CalledProcessError):
+            pass
+
+        raise CheckFailed()
+
+
+class OptionalPackageData(OptionalPackage):
+    config_category = "package_data"
+
+
+class Dlls(OptionalPackageData):
+    """
+    On Windows, this packages any DLL files that can be found in the
+    lib/matplotlib/* directories.
+    """
+    name = "dlls"
+
+    def check_requirements(self):
+        if sys.platform != 'win32':
+            raise CheckFailed("Microsoft Windows only")
+
+    def get_package_data(self):
+        return {'': ['*.dll']}
+
+    @classmethod
+    def get_config(cls):
+        """
+        Look at `setup.cfg` and return one of ["auto", True, False] indicating
+        if the package is at default state ("auto"), forced by the user (True)
+        or opted-out (False).
+        """
+        try:
+            return config.getboolean(cls.config_category, cls.name)
+        except:
+            return False  # <-- default
diff --git a/development/python3-matplotlib/slack-desc b/development/python3-matplotlib/slack-desc
new file mode 100644
index 000000000000..da2208fe1b11
--- /dev/null
+++ b/development/python3-matplotlib/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+                  |-----handy-ruler------------------------------------------------------|
+python3-matplotlib: python3-matplotlib (a Python 2D plotting library)
+python3-matplotlib:
+python3-matplotlib: Matplotlib is a plotting library for Python which uses
+python3-matplotlib: syntax similar to MATLAB.  Matplotlib produces publication
+python3-matplotlib: quality figures in a variety of hardcopy formats and
+python3-matplotlib: interactive environments across platforms.
+python3-matplotlib:
+python3-matplotlib: Homepage: http://matplotlib.sourceforge.net/
+python3-matplotlib:
+python3-matplotlib: This is the Python 3 version of matplotlib and can coexist with SBo's
+python3-matplotlib: matplotlib package.