Re: wxPython Phoenix build fail ("Could not build python extensions"?) in pyenv 3.5.1 on Linux

Michael Freeman wrote:
> So Blender loads up OK using the "pyenv" Python, but both the build I
> did in "pyenv" *AND* the build to a wheel in "venv" (the wheel install
> replaced the pip built version) throws this error ...
...

>     from ._core import *
> ImportError:
> /home/michaelzfreeman/Downloads/blender-2.77-a5261e0-linux-glibc219-x86_64/2.77/python/lib/python3.5/site-packages/wx/_core.cpython-35m-x86_64-linux-gnu.so:
> symbol _ZNK8wxWindow7IsShownEv, version WXU_3.0 not defined in file
> libwx_gtk2u_core-3.0.so.0 with link time reference

Does the same thing happen if you import wx in a Python session (which
has your Phoenix wheel installed) outside of the Blender environment? 
(I wasn't sure if this is what you meant in the second half of your
opening statement above.)

Errors like this could happen if the system is loading the wrong version
of a shared library, for example if it loads a lib different than the
one it was linked with at build time.  On linux you can use the ldd
command to determine where shared libraries are coming from, try this:

    ldd
/home/michaelzfreeman/Downloads/blender-2.77-a5261e0-linux-glibc219-x86_64/2.77/python/lib/python3.5/site-packages/wx/_core.cpython-35m-x86_64-linux-gnu.so

and there should be a line in the output that shows the full path to the
libwx_gtk2u_core-3.0.so.0 it is loading.  For a normal Phoenix build
(without flags telling it to use a different wxWidgets or etc.) then it
should use the libwx_* files in the same folder as the Phoenix extension
modules.  If it does show it using that lib then perhaps Blender is
setting something in the environment that is preventing the dynamic
loader from using the rpath set in the Phoenix modules, and it is
looking in the system or Blender libs location or something instead.  So
if you can repeat that command inside of Blender somehow then that may
give some clues as well.


> This could be a build flag: "wxPython-dev › wxpython-3.0.0.0 and
> libnotify" -
> https://groups.google.com/forum/#!topic/wxpython-dev/DGMlB7Gi4ss
> <https://groups.google.com/forum/#%21topic/wxpython-dev/DGMlB7Gi4ss>

The missing symbol doesn't have anything to do with the libnotify
functionality.


-- 
Robin Dunn
Software Craftsman
http://wxPython.org

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