* Package:    dev-python/matplotlib-1.3.1
 * Repository: gentoo
 * Maintainer: python@gentoo.org
 * USE:        abi_x86_64 amd64 cairo elibc_glibc gtk kernel_linux latex python_targets_python2_7 qt4 userland_GNU
 * FEATURES:   preserve-libs sandbox userpriv usersandbox
 * Will copy sources from /var/tmp/portage/dev-python/matplotlib-1.3.1/work/matplotlib-1.3.1
 * python2_7: copying to /var/tmp/portage/dev-python/matplotlib-1.3.1/work/matplotlib-1.3.1-python2_7
 * python2_7: running distutils-r1_run_phase python_configure
 * python2_7: running distutils-r1_run_phase python_configure_all
 * python2_7: running distutils-r1_run_phase python_compile
/usr/bin/python2.7 setup.py build build --build-lib=/var/tmp/portage/dev-python/matplotlib-1.3.1/work/matplotlib-1.3.1-python2_7/build/build/lib
============================================================================
Edit setup.cfg to change the build options

BUILDING MATPLOTLIB
            matplotlib: yes [1.3.1]
                python: yes [2.7.8 (default, Aug 23 2014, 22:56:46)  [GCC
                        4.9.0]]
              platform: yes [linux2]

REQUIRED DEPENDENCIES AND EXTENSIONS
                 numpy: yes [version 1.9.1]
              dateutil: yes [using dateutil version 2.2]
               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 2.0.3]
                 pycxx: yes [Couldn't import.  Using local copy.]
                libagg: yes [pkg-config information for 'libagg' could not
                        be found. Using local copy.]
              freetype: yes [version 17.2.11]
                   png: yes [version 1.6.15]

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]

OPTIONAL BACKEND EXTENSIONS
                macosx: no  [Mac OS-X only]
                qt4agg: no  [PyQt4 not found]
               gtk3agg: no  [skipping due to configuration]
             gtk3cairo: no  [skipping due to configuration]
                gtkagg: yes [installing, Gtk: 2.24.25 pygtk: 2.24.0]
                 tkagg: no  [skipping due to configuration]
                 wxagg: no  [skipping due to configuration]
                   gtk: yes [installing, Gtk: 2.24.25 pygtk: 2.24.0]
                   agg: yes [installing]
                 cairo: yes [installing, version 1.10.0]
             windowing: no  [Microsoft Windows only]

OPTIONAL LATEX DEPENDENCIES
                dvipng: yes [version Larsson]
           ghostscript: yes [version 9.15]
                 latex: yes [version 3.14159265]
               pdftops: yes [version 0.28.0]

============================================================================
                        * The following required packages can not be built:
                        * qt4agg
 * ERROR: dev-python/matplotlib-1.3.1::gentoo failed (compile phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line   93:  Called src_compile
 *   environment, line 4145:  Called distutils-r1_src_compile
 *   environment, line 1389:  Called _distutils-r1_run_foreach_impl 'python_compile'
 *   environment, line  395:  Called python_parallel_foreach_impl 'distutils-r1_run_phase' 'python_compile'
 *   environment, line 3901:  Called multibuild_parallel_foreach_variant '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'python_compile'
 *   environment, line 2814:  Called multibuild_foreach_variant '_multibuild_parallel' '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'python_compile'
 *   environment, line 2757:  Called _multibuild_run '_multibuild_parallel' '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'python_compile'
 *   environment, line 2755:  Called _multibuild_parallel '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'python_compile'
 *   environment, line 2805:  Called _python_multibuild_wrapper 'distutils-r1_run_phase' 'python_compile'
 *   environment, line  878:  Called distutils-r1_run_phase 'python_compile'
 *   environment, line 1380:  Called python_compile
 *   environment, line 3252:  Called virtualmake
 *   environment, line 4848:  Called wrap_setup 'distutils-r1_python_compile'
 *   environment, line 4858:  Called distutils-r1_python_compile 'build' '--build-lib=/var/tmp/portage/dev-python/matplotlib-1.3.1/work/matplotlib-1.3.1-python2_7/build/build/lib'
 *   environment, line 1260:  Called esetup.py 'build' 'build' '--build-lib=/var/tmp/portage/dev-python/matplotlib-1.3.1/work/matplotlib-1.3.1-python2_7/build/build/lib'
 *   environment, line 1831:  Called die
 * The specific snippet of code:
 *       "${@}" || die
 * 
 * If you need support, post the output of `emerge --info '=dev-python/matplotlib-1.3.1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-python/matplotlib-1.3.1::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-python/matplotlib-1.3.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-python/matplotlib-1.3.1/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-python/matplotlib-1.3.1/work/matplotlib-1.3.1-python2_7'
 * S: '/var/tmp/portage/dev-python/matplotlib-1.3.1/work/matplotlib-1.3.1'