OSX on intel universal build import error for _glcanvas.so

Dan_White · May 17, 2006, 4:35pm

Dear wxPython and VTK developers

while running our BioImageXD python application from the command line
on my MacBookPro OSX 10.4 with universal build installs of python2.4 and wxPython2.6-mac-unicode
I get an interesting error that looks like a problem with xwPython,

I can replicate the error with the following:

daniel-whites-computer:~ bioimagexd$ /usr/local/bin/python2.4
Python 2.4.3 (#1, Apr 7 2006, 10:54:33)
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import wx
>>> from wxPython.glcanvas import *
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wxPython/glcanvas.py", line 15, in ?
     import wx.glcanvas
   File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/glcanvas.py", line 8, in ?
     import _glcanvas
ImportError: Failure linking new module: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_glcanvas.so: Symbol not found: __ZN11wxGLContext11SwapBuffersEv
   Referenced from: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_glcanvas.so
   Expected in: dynamic lookup

>>>

Is this a problem in xwPython?

I haven't noticed the same problem on a PowerMac PPC G5 with PPC python 2.4 and wxPython2.5.5-mac-unicode

cheers

Dan

Dr. Daniel James White BSc. (Hons.) PhD
Bioimaging Coordinator
Nanoscience Centre and Department of Biological and Environmental Sciences
Division of Molecular Recognition
Ambiotica C242
PO Box 35
University of Jyväskylä
Jyväskylä
FIN 40014
Finland

+358 14 260 4183 (work)
+358 468102840 (mobile)
http://www.bioimagexd.org
http://www.chalkie.org.uk
dan@chalkie.org.uk
white@cc.jyu.fi

Kevin_Ollivier4 · May 17, 2006, 5:18pm

Hi Dan,

Many thanks for pointing this out. There were some linker errors with glcanvas on the Universal build that I tried to fix, but apparently my fix didn't work. I'll try and figure out exactly what is going on here, and I'll post an updated build once I do.

Thanks,

Kevin

···

On May 17, 2006, at 9:35 AM, Dan White wrote:

Dear wxPython and VTK developers

while running our BioImageXD python application from the command line
on my MacBookPro OSX 10.4 with universal build installs of python2.4 and wxPython2.6-mac-unicode
I get an interesting error that looks like a problem with xwPython,

I can replicate the error with the following:

daniel-whites-computer:~ bioimagexd$ /usr/local/bin/python2.4
Python 2.4.3 (#1, Apr 7 2006, 10:54:33)
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import wx
>>> from wxPython.glcanvas import *
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wxPython/glcanvas.py", line 15, in ?
    import wx.glcanvas
  File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/glcanvas.py", line 8, in ?
    import _glcanvas
ImportError: Failure linking new module: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_glcanvas.so: Symbol not found: __ZN11wxGLContext11SwapBuffersEv
  Referenced from: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_glcanvas.so
  Expected in: dynamic lookup

>>>

Is this a problem in xwPython?

I haven't noticed the same problem on a PowerMac PPC G5 with PPC python 2.4 and wxPython2.5.5-mac-unicode

cheers

Dan

Dr. Daniel James White BSc. (Hons.) PhD
Bioimaging Coordinator
Nanoscience Centre and Department of Biological and Environmental Sciences
Division of Molecular Recognition
Ambiotica C242
PO Box 35
University of Jyväskylä
Jyväskylä
FIN 40014
Finland

+358 14 260 4183 (work)
+358 468102840 (mobile)
http://www.bioimagexd.org
http://www.chalkie.org.uk
dan@chalkie.org.uk
white@cc.jyu.fi

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Glen_Lehmann · May 19, 2006, 4:14pm

Hello Dan,

I suspect one of the libraries that _glcanvas.so is linked against can't be found at runtime. If this is the case and you repeat your example below using "gdb /usr/local/bin/python2.4" instead, gdb should show you which library is missing.

You can also try running:

>> otool -L Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_glcanvas.so

which will give you a list of all the libraries that _glcanvas.so is looking for.

Glen

···

On 17-May-06, at 12:35 PM, Dan White wrote:

Dear wxPython and VTK developers

while running our BioImageXD python application from the command line
on my MacBookPro OSX 10.4 with universal build installs of python2.4 and wxPython2.6-mac-unicode
I get an interesting error that looks like a problem with xwPython,

I can replicate the error with the following:

daniel-whites-computer:~ bioimagexd$ /usr/local/bin/python2.4
Python 2.4.3 (#1, Apr 7 2006, 10:54:33)
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import wx
>>> from wxPython.glcanvas import *
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wxPython/glcanvas.py", line 15, in ?
    import wx.glcanvas
  File "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/glcanvas.py", line 8, in ?
    import _glcanvas
ImportError: Failure linking new module: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_glcanvas.so: Symbol not found: __ZN11wxGLContext11SwapBuffersEv
  Referenced from: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.6-mac-unicode/wx/_glcanvas.so
  Expected in: dynamic lookup

>>>

Is this a problem in xwPython?

I haven't noticed the same problem on a PowerMac PPC G5 with PPC python 2.4 and wxPython2.5.5-mac-unicode

cheers

Dan

Dr. Daniel James White BSc. (Hons.) PhD
Bioimaging Coordinator
Nanoscience Centre and Department of Biological and Environmental Sciences
Division of Molecular Recognition
Ambiotica C242
PO Box 35
University of Jyväskylä
Jyväskylä
FIN 40014
Finland

+358 14 260 4183 (work)
+358 468102840 (mobile)
http://www.bioimagexd.org
http://www.chalkie.org.uk
dan@chalkie.org.uk
white@cc.jyu.fi

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