matplotlib-users Mailing List for matplotlib

Hello,
I'm having an issue building Matplotlib. In reality the build process
finishes without error, but afterwards I get this error when importing
pyplot:
[kpi@dev-outils lib.linux-x86_64-3.3]$ python3.3
Python 3.3.2 (default, Sep 17 2013, 10:40:41)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> import matplotlib.pyplot as plt
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "./matplotlib/pyplot.py", line 24, in <module>
 import matplotlib.colorbar
 File "./matplotlib/colorbar.py", line 27, in <module>
 import matplotlib.artist as martist
 File "./matplotlib/artist.py", line 8, in <module>
 from .transforms import Bbox, IdentityTransform, TransformedBbox, \
 File "./matplotlib/transforms.py", line 35, in <module>
 from matplotlib._path import (affine_transform,
count_bboxes_overlapping_bbox,
*ImportError: ./matplotlib/_path.cpython-33m.so
<http://path.cpython-33m.so>: undefined symbol:
_ZSt16__ostream_insertIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_PKS3_l*
I don't know a thing about building C extensions, but if I understood
correctly some pasts posts in this list and others, this problem might be
caused by a library that is compiled with an incompatible version of GCC.
My first suspect was freetype, so I downloaded and compiled v2.4.12 using
gcc44 (which is the same compiler I used to build python3.3 and matplotlib).
But the problem persists... My question is: *how can I know wich library is
causing the issue, so I could recompile it?*
Or, if I am completely missing the root cause, thank you for steering me in
the correct direction :-)
More detailed info follows. Thank you for your help !
Nicolas
Here is the information asked for in the troubleshooting FAQ:
[kpi@dev-outils matplotlib]$ uname -a
Linux dev-outils.admin.mt.lan 2.6.18-348.16.1.el5 #1 SMP Wed Aug 21
04:00:25 EDT 2013 x86_64 x86_64 x86_64 GNU/Linux
[kpi@dev-outils matplotlib]$ cat /etc/redhat-release
CentOS release 5.9 (Final)
But please, note that I am using a Python version built by myself (not the
version that comes with CenOS 5.9) using gcc 4.4.7 (and not gcc 4.1.2)
[kpi@dev-outils matplotlib]$ gcc44 -v
Using built-in specs.
Target: x86_64-redhat-linux6E
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=release
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--disable-gnu-unique-object --with-as=/usr/libexec/binutils220/as
--enable-languages=c,c++,fortran --disable-libgcj
--with-mpfr=/builddir/build/BUILD/gcc-4.4.7-20120601/obj-x86_64-redhat-linux6E/mpfr-install/
--with-ppl=/builddir/build/BUILD/gcc-4.4.7-20120601/obj-x86_64-redhat-linux6E/ppl-install
--with-cloog=/builddir/build/BUILD/gcc-4.4.7-20120601/obj-x86_64-redhat-linux6E/cloog-install
--with-tune=generic --with-arch_32=i586 --build=x86_64-redhat-linux6E
Thread model: posix
gcc version 4.4.7 20120313 (Red Hat 4.4.7-1) (GCC)
[kpi@dev-outils lib.linux-x86_64-3.3]$ python3.3
Python 3.3.2 (default, Sep 17 2013, 10:40:41)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux
>>> matplotlib.__version__
'1.3.1'
Here is what I modified in setup.cfg last time (but I also tried with an
unmodified version with the same results):
[gui_support]
agg = True
cairo = False
gtk = False
gtk3agg = False
gtk3cairo = False
gtkagg = False
macosx = False
pyside = False
qt4agg = False
tkagg = False
windowing = False
wxagg = False
[rc_options]
backend = Agg
I didn't modify any other config file. Here is the output of the build
process:
[kpi@dev-outils matplotlib-1.3.1]$ python3.3 setup.py build
============================================================================
Edit setup.cfg to change the build options
BUILDING MATPLOTLIB
 matplotlib: yes [1.3.1]
 python: yes [3.3.2 (default, Sep 17 2013, 10:40:41) [GCC
 4.4.7 20120313 (Red Hat 4.4.7-1)]]
 platform: yes [linux]
REQUIRED DEPENDENCIES AND EXTENSIONS
 numpy: yes [version 1.8.0]
 dateutil: yes [using dateutil version 2.2]
 tornado: yes [using tornado version 3.1.1]
 pyparsing: yes [using pyparsing version 2.0.1]
 pycxx: yes [Official versions of PyCXX are not compatible
 with Python 3.x. Using local copy]
 libagg: yes [pkg-config information for 'libagg' could not
 be found. Using local copy.]
 freetype: yes [version 16.1.10]
 png: yes [version 1.2.10]
OPTIONAL SUBPACKAGES
 sample_data: yes [installing]
 toolkits: yes [installing]
 tests: yes [using nose version 1.3.0]
OPTIONAL BACKEND EXTENSIONS
 macosx: no [skipping due to configuration]
 qt4agg: no [skipping due to configuration]
 gtk3agg: no [skipping due to configuration]
 gtk3cairo: no [skipping due to configuration]
 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 [skipping due to configuration]
 windowing: no [skipping due to configuration]
OPTIONAL LATEX DEPENDENCIES
 dvipng: no
 ghostscript: yes [version 8.70]
 latex: no
 pdftops: no
running build
running build_py
creating build