g++ libstdc++ linker question.

["F. Heitkamp" <heitkamp@xxxxxxxxxxxxx>]

People will tell me to ask on matplotlib list but I believe this a more 
generic GNU C++ question.
I have been trying to run matplotlib that I built from source on my 
linux from scratch like box.

When I try to run an example I get:

bash-4.2$ python2.6 matplotlib-ex1.py
Traceback (most recent call last):
  File "matplotlib-ex1.py", line 13, in <module>
    import matplotlib.pyplot as plt
  File "/usr/lib/python2.6/site-packages/matplotlib/pyplot.py", line 
23, in <module>
    from matplotlib.figure import Figure, figaspect
  File "/usr/lib/python2.6/site-packages/matplotlib/figure.py", line 
16, in <module>
    import artist
  File "/usr/lib/python2.6/site-packages/matplotlib/artist.py", line 6, 
in <module>
    from transforms import Bbox, IdentityTransform, TransformedBbox, 
TransformedPath
  File "/usr/lib/python2.6/site-packages/matplotlib/transforms.py", 
line 34, in <module>
    from matplotlib._path import affine_transform
ImportError: /usr/lib/python2.6/site-packages/matplotlib/_path.so: 
undefined symbol: 
_ZSt16__ostream_insertIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_PKS3_i

I see this symbol is in 32 bits libstdc++ library, but does not seem to 
appear in 64 bits versions.

bash-4.2$ ldd /usr/lib/python2.6/site-packages/matplotlib/_path.so
    linux-gate.so.1 =>  (0xffffe000)
    libpython2.6.so.1.0 => /usr/lib/libpython2.6.so.1.0 (0xf74f7000)
    libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xf74de000)
    libpthread.so.0 => /lib/libpthread.so.0 (0xf74c4000)
    libc.so.6 => /lib/libc.so.6 (0xf7367000)
    libdl.so.2 => /lib/libdl.so.2 (0xf7362000)
    libutil.so.1 => /lib/libutil.so.1 (0xf735e000)
    libm.so.6 => /lib/libm.so.6 (0xf7338000)
    /lib/ld-linux.so.2 (0xf77d1000)

libstdc++ is not shown as being linked with _path.so

Any thoughts?

Fred