[Matplotlib-users] build matplotlib in anaconda environment, wrong png version
Gustavo Goretkin
gustavo.goretkin at gmail.com
Thu Mar 3 16:53:45 EST 2016
I just tried to build v1.5.1 from source, with `python setup.py develop`,
where `python` is a python within an anaconda distribution.
It builds fine, and I can do many things with the library. But when saving,
I see the warning
libpng warning: Application built with libpng-1.6.17 but running with 1.5.23
>
and eventually
/Users/goretkin/repos/matplotlib/lib/matplotlib/backends/backend_pdf.py in
_writePng(self, data)
1283
1284 buffer = BytesIO()
-> 1285 _png.write_png(data, buffer)
1286 buffer.seek(8)
1287 written = 0
RuntimeError: Could not create write struct
Indeed, the build script shows
BUILDING MATPLOTLIB
matplotlib: yes [1.5.1]
python: yes [3.5.1 |Continuum Analytics, Inc.| (default, Dec
7 2015, 11:24:55) [GCC 4.2.1 (Apple Inc. build
5577)]]
platform: yes [darwin]
REQUIRED DEPENDENCIES AND EXTENSIONS
numpy: yes [version 1.10.4]
dateutil: yes [using dateutil version 2.4.2]
pytz: yes [using pytz version 2015.7]
cycler: yes [using cycler version 0.10.0]
tornado: yes [using tornado version 4.3]
pyparsing: yes [using pyparsing version 2.0.3]
libagg: yes [pkg-config information for 'libagg' could not
be found. Using local copy.]
freetype: yes [version 2.5.5]
png: yes [version 1.6.17]
qhull: yes [pkg-config information for 'qhull' could not be
found. Using local copy.]
Is this a problem with anaconda reporting the wrong paths? Indeed the
version of libpng in this anaconda environment is libpng16, so its right to
build against it. At run time, someone's to blame for loading the wrong
dynamic library.
goretkin-mbp:lib goretkin$ ls -la ~/anaconda2/envs/py3_601/lib/ | grep png
> lrwxr-xr-x 1 goretkin staff 10 Jan 23 14:14 libpng.a ->
> libpng16.a
> lrwxr-xr-x 1 goretkin staff 17 Jan 23 14:14 libpng.dylib ->
> libpng16.16.dylib
> lrwxr-xr-x 1 goretkin staff 11 Jan 23 14:14 libpng.la ->
> libpng16.la
> -rwxr-xr-x 7 goretkin staff 271336 May 26 2015 libpng16.16.dylib
> -rw-r--r-- 7 goretkin staff 360224 May 26 2015 libpng16.a
> lrwxr-xr-x 1 goretkin staff 17 Jan 23 14:14 libpng16.dylib ->
> libpng16.16.dylib
> -rwxr-xr-x 1 goretkin staff 951 Jan 23 14:14 libpng16.la
>
$ otool -L ~/anaconda2/envs/py3_601/lib/libpng.dylib
/Users/goretkin/anaconda2/envs/py3_601/lib/libpng.dylib:
libpng16.16.dylib (compatibility version 34.0.0, current version 34.0.0)
/usr/lib/libz.1.dylib (compatibility version 1.0.0, current version
1.2.3)
/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version
1.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
version 111.0.0)
Thanks,
Gustavo
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