output of 'toolchain.py build matplotlib'

Build_all matplotlib
Build matplotlib for i386, x86_64, armv7, arm64 (filtered)
Build matplotlib
Prebuild matplotlib for i386
Build matplotlib for i386
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Downloading http://pypi.python.org/packages/source/d/distribute/distribute-0.6.28.tar.gz
Extracting in /tmp/tmpy6FNo8
Now working in /tmp/tmpy6FNo8/distribute-0.6.28
Building a Distribute egg in /Users/fcorreia/projects/kivy-ios/build/matplotlib/i386/v1.5.2
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
/Users/fcorreia/projects/kivy-ios/build/matplotlib/i386/v1.5.2/distribute-0.6.28-py2.7.egg
============================================================================
Edit setup.cfg to change the build options

BUILDING MATPLOTLIB
            matplotlib: yes [0+unknown]
                python: yes [2.7.1 (r271:86832, Sep 12 2016, 15:42:20)  [GCC
                        4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.31)]]
              platform: yes [darwin]

REQUIRED DEPENDENCIES AND EXTENSIONS
                 numpy: yes [not found. pip may install it below.]
              dateutil: yes [dateutil was not found. It is required for date
                        axis support. pip/easy_install may attempt to
                        install it after matplotlib.]
                  pytz: yes [pytz was not found. pip will attempt to install
                        it after matplotlib.]
                cycler: yes [cycler was not found. pip will 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.]
                libagg: yes [pkg-config information for 'libagg' could not
                        be found. Using local copy.]
              freetype: yes [version 2.6.5]
                   png: yes [version 1.6.24]
                 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 [nose 0.11.1 or later is required to run the
                        matplotlib test suite. Please install it with pip or
                        your preferred tool to run the test suite / mock is
                        required to run the matplotlib test suite. Please
                        install it with pip or your preferred tool to run
                        the test suite]
        toolkits_tests: yes [nose 0.11.1 or later is required to run the
                        matplotlib test suite. Please install it with pip or
                        your preferred tool to run the test suite / mock is
                        required to run the matplotlib test suite. Please
                        install it with pip or your preferred tool to run
                        the test suite]

OPTIONAL BACKEND EXTENSIONS
                macosx: yes [installing, darwin]
                qt5agg: no  [PyQt5 not found]
                qt4agg: no  [PySide not found; PyQt4 not found]
               gtk3agg: yes [installing, unknown (can not use
                        multiprocessing to determine)]
             gtk3cairo: yes [installing, unknown (can not use
                        multiprocessing to determine)]
                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: no
           ghostscript: yes [version 9.19]
                 latex: no
               pdftops: no

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

Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Running from numpy source directory.
/tmp/easy_install-YRv609/numpy-1.11.1/setup.py:327: UserWarning: Unrecognized setuptools command, proceeding with generating Cython sources and expanding templates
  warnings.warn("Unrecognized setuptools command, proceeding with "
non-existing path in 'numpy/distutils': 'site.cfg'
/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'define_macros'
  warnings.warn(msg)
Could not locate executable gfortran
Could not locate executable f95
Could not locate executable f90
Could not locate executable f77
Could not locate executable xlf90
Could not locate executable xlf
Could not locate executable ifort
Could not locate executable ifc
Could not locate executable g77
Could not locate executable g95
Could not locate executable pgfortran
don't know how to compile Fortran code on platform 'posix'
ld: warning: ignoring file _configtest.o, file was built for i386 which is not the architecture being linked (x86_64): _configtest.o
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ld: warning: ignoring file _configtest.o, file was built for i386 which is not the architecture being linked (x86_64): _configtest.o
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Traceback (most recent call last):
  File "setup.py", line 277, in <module>
    **extra_args
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/core.py", line 112, in setup
    _setup_distribution = dist = klass(attrs)
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/dist.py", line 221, in __init__
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/dist.py", line 245, in fetch_build_eggs
  File "build/bdist.macosx-10.11-x86_64/egg/pkg_resources.py", line 580, in resolve
  File "build/bdist.macosx-10.11-x86_64/egg/pkg_resources.py", line 825, in best_match
  File "build/bdist.macosx-10.11-x86_64/egg/pkg_resources.py", line 837, in obtain
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/dist.py", line 294, in fetch_build_egg
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/command/easy_install.py", line 598, in easy_install
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/command/easy_install.py", line 628, in install_item
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/command/easy_install.py", line 823, in install_eggs
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/command/easy_install.py", line 1103, in build_and_install
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/command/easy_install.py", line 1089, in run_setup
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/sandbox.py", line 30, in run_setup
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/sandbox.py", line 78, in run
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/sandbox.py", line 32, in <lambda>
  File "setup.py", line 386, in <module>
    
  File "setup.py", line 378, in setup_package
    
  File "/tmp/easy_install-YRv609/numpy-1.11.1/numpy/distutils/core.py", line 169, in setup
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "build/bdist.macosx-10.11-x86_64/egg/setuptools/command/bdist_egg.py", line 172, in run
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/tmp/easy_install-YRv609/numpy-1.11.1/numpy/distutils/command/egg_info.py", line 18, in run
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "/Users/fcorreia/projects/kivy-ios/dist/hostpython/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/tmp/easy_install-YRv609/numpy-1.11.1/numpy/distutils/command/build_src.py", line 147, in run
  File "/tmp/easy_install-YRv609/numpy-1.11.1/numpy/distutils/command/build_src.py", line 158, in build_sources
  File "/tmp/easy_install-YRv609/numpy-1.11.1/numpy/distutils/command/build_src.py", line 293, in build_library_sources
  File "/tmp/easy_install-YRv609/numpy-1.11.1/numpy/distutils/command/build_src.py", line 376, in generate_sources
  File "numpy/core/setup.py", line 654, in get_mathlib_info
    
RuntimeError: Broken toolchain: cannot link a simple C program
Traceback (most recent call last):
  File "./toolchain.py", line 1311, in <module>
    ToolchainCL()
  File "./toolchain.py", line 1082, in __init__
    getattr(self, args.command)()
  File "./toolchain.py", line 1106, in build
    build_recipes(args.recipe, ctx)
  File "./toolchain.py", line 974, in build_recipes
    recipe.execute()
  File "/Users/fcorreia/projects/kivy-ios/toolchain.py", line 586, in execute
    self.build_all()
  File "/Users/fcorreia/projects/kivy-ios/toolchain.py", line 56, in _cache_execution
    f(self, *args, **kwargs)
  File "/Users/fcorreia/projects/kivy-ios/toolchain.py", line 673, in build_all
    self.build(arch)
  File "/Users/fcorreia/projects/kivy-ios/toolchain.py", line 56, in _cache_execution
    f(self, *args, **kwargs)
  File "/Users/fcorreia/projects/kivy-ios/toolchain.py", line 660, in build
    self.build_arch(arch)
  File "/Users/fcorreia/projects/kivy-ios/toolchain.py", line 932, in build_arch
    _env=build_env)
  File "/Users/fcorreia/projects/kivy-ios/toolchain.py", line 39, in shprint
    for line in command(*args, **kwargs):
  File "./tools/external/sh.py", line 565, in next
    self.wait()
  File "./tools/external/sh.py", line 500, in wait
    self.handle_command_exit_code(exit_code)
  File "./tools/external/sh.py", line 516, in handle_command_exit_code
    raise exc(self.ran, self.process.stdout, self.process.stderr)
sh.ErrorReturnCode_1: 

  RAN: '/Users/fcorreia/projects/kivy-ios/dist/hostpython/bin/python setup.py build_ext -g'

  STDOUT:
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Downloading http://pypi.python.org/packages/source/d/distribute/distribute-0.6.28.tar.gz
Extracting in /tmp/tmpy6FNo8
Now working in /tmp/tmpy6FNo8/distribute-0.6.28
Building a Distribute egg in /Users/fcorreia/projects/kivy-ios/build/matplotlib/i386/v1.5.2
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
/Users/fcorreia/projects/kivy-ios/build/matplotlib/i386/v1.5.2/distribute-0.6.28-py2.7.egg
============================================================================
Edit s... (8976 more, please see e.stdout)

  STDERR: