Re: [Matplotlib-users] segfaults in ipython

[Steve S. <el...@gm...>]

John Hunter wrote:
>>>>>>"Steve" == Steve Schmerler <el...@gm...> writes:
> 
> 
>     Steve> I still can plot as root, but not as user!? If it's some
> 
> That I find bizarre.  Could it be a PATH or an LD_LIBRARY_PATH issue;
> ie, you and root are using different libraries.  Have you customized
> either of these variables?  For example, if you do the following as
> yourself and root, do you get the same link information
> 
>   > ldd /usr/lib/python2.4/site-packages/matplotlib/_nc_transforms.so 

I'm using Python 2.3.5, but

no, both:

           libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0x4009e000)
           libm.so.6 => /lib/tls/libm.so.6 (0x40159000)
           libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x4017b000)
           libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40184000)
           libc.so.6 => /lib/tls/libc.so.6 (0x40193000)
           /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)


>   > ldd /usr/lib/python2.4/site-packages/Numeric/_numpy.so

no, both:

           libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40026000)
           libc.so.6 => /lib/tls/libc.so.6 (0x40036000)
           /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)


> 
>     Steve> kind of permission problem it would be good to know
>     Steve> something about "../Objects/moduleobject.c". I there a way
>     Steve> to get IPython to print the full path?
> 
> This is part of python -- if you install python-dev you should be able
> to find the header on your system, eg at
> 
>   /usr/include/python2.4/moduleobject.h
>

Yes, I have this one (/usr/include/python2.3/moduleobject.h).

> 
>     Steve> Uh, I didn't build TkAgg, So I set BUILD_TKAGG = 'auto',
>     Steve> but
> 
> 
>     Steve> Do I have to install something besides python-tk?
> 
> You need the tk8.4-dev and maybe the tcl8.4-dev headers.  You may have
> a different version number.
> 

Ah OK. That does it.

> 
>     Steve> I hope we can sort this out.
> 
> Two other things to try.
> 
>   1) See if we can narrow down where the segfault is occurring by trying
>      to import the matplotlib modules separately
> 
>       import matplotlib.ft2font
>       import matplotlib._transforms
>       import matplotlib._agg
>       import matplotlib.backends._backend_agg
>       
> 

I hope this was what you ment:

ipython -pylab and then

####################################################################

In [1]: import matplotlib.ft2font

In [2]: import matplotlib._transforms

In [3]: import matplotlib._agg

In [4]: import matplotlib.backends._backend_agg
---------------------------------------------------------------------------
exceptions.ImportError                               Traceback (most
recent call last)

/home/elcorto/Install/Matplotlib/matplotlib-0.83.2/<console>

ImportError: No module named _backend_agg

In [5]: import matplotlib.backends._gtkagg

####################################################################


>   2) Compile matplotlib with 
> 
>       VERBOSE =  True

OK this prints a lot. I did

	python setup.py build > build_log.txt

It then prints some additional output which I pasted into
build_log2.txt. I hope this helps in any way.

I attached my setup.py and the *.txt files.


BTW, I installed the .debs (mpl 0.82)

	from http://anakonda.altervista.org (on the mpl website)

and this works!


cheers,
steve