On 05.04.2013 07:37, Fernando Perez wrote:
> Well, I'm using the system libpng, which is what puzzles me: there
> should be no need for me to modify my LD_..., and I haven't done so in
> the past.  I'll have to dig into the build tomorrow to figure out
> exactly what's going on there...
> 

whats the output of:
ldd
/home/fperez/usr/opt/lib/python2.7/site-packages/matplotlib-1.3.x-py2.7-linux-x86_64.egg/matplotlib/_png.so
apt-cache policy libpng12-dev

the system libpng in ubuntu 12.10 does have this symbol defined, maybe
you are picking up some other installation.


> Will report back.
> 
> 
> On Thu, Apr 4, 2013 at 9:24 PM, Damon McDougall
> <damon.mcdoug...@gmail.com <mailto:damon.mcdoug...@gmail.com>> wrote:
> 
> 
> 
> 
>     On Thu, Apr 4, 2013 at 10:51 PM, Fernando Perez
>     <fperez....@gmail.com <mailto:fperez....@gmail.com>> wrote:
> 
>         Thanks, Damon, for this info.
> 
>         Based on this, I've tested now on another, different system with
>         the same version of linux and can't reproduce it either.  Very
>         odd, but it looks like something is amiss on my end, so let me
>         investigate further before anyone burns further cycles on the issue.
> 
>         Cheers,
> 
>         f
> 
> 
>         On Thu, Apr 4, 2013 at 8:06 PM, Damon McDougall
>         <damon.mcdoug...@gmail.com <mailto:damon.mcdoug...@gmail.com>>
>         wrote:
> 
>             On Thu, Apr 4, 2013 at 6:41 PM, Fernando Perez
>             <fperez....@gmail.com <mailto:fperez....@gmail.com>> wrote:
> 
>                 Hi folks,
> 
>                 I'm getting the following error from a clean build of
>                 master on an
>                 ubuntu 12.10 machine:
> 
>                 longs[junk]> python -c 'import matplotlib._png'
>                 Traceback (most recent call last):
>                   File "<string>", line 1, in <module>
>                 ImportError:
>                 
> /home/fperez/usr/opt/lib/python2.7/site-packages/matplotlib-1.3.x-py2.7-linux-x86_64.egg/matplotlib/_png.so:
>                 undefined symbol: png_create_read_struct
> 
> 
>                 I hadn't seen anything like this recently, nor can I
>                 find similar
>                 reports, so I'm wondering if anyone knows what's going
>                 on, or if it's
>                 an error on my side.  I can try to bisect it but I
>                 figured I'd ask
>                 first in case it's obvious to someone else...
> 
>                 Cheers,
> 
>                 f
> 
> 
>             Hi Fernando,
> 
>             I can't recreate this on OS X with the current git master
>             branch, which is at 11e7ed.
> 
>             Best wishes,
>             Damon
> 
>             -- 
>             Damon McDougall
>             http://www.damon-is-a-geek.com
>             Institute for Computational Engineering Sciences
>             201 E. 24th St.
>             Stop C0200
>             The University of Texas at Austin
>             Austin, TX 78712-1229
> 
> 
> 
>     Any time, Fernando.
> 
>     Out of curiosity, is the png_create_read_struct a symbol from
>     libpng?  If so, try adding wherever your libpng lives to your
>     LD_LIBRARY_PATH and see what happens.
> 
>     Best wishes,
>     Damon
> 
>     -- 
>     Damon McDougall
>     http://www.damon-is-a-geek.com
>     Institute for Computational Engineering Sciences
>     201 E. 24th St.
>     Stop C0200
>     The University of Texas at Austin
>     Austin, TX 78712-1229
> 
> 
> 
> 
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