[SciPy-user] OSX Issue -- Symbol not found: _fprintf$LDBLStub

Bill Northcott w.northcott at unsw.edu.au
Tue Apr 25 18:03:26 CDT 2006

On 25/04/2006, at 12:38 PM, Greg wrote:
> Hey!  I'm attempting to get SciPy to run on OSX 10.4 (Tiger), with
> the latest version of Xcode (2.2.1, I believe) installed.  When I run
> python and import scipy.fftpack, I get the following error:
> Python 2.4.3 (#1, Mar 30 2006, 11:02:15)
> [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import scipy.fftpack
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "/Library/Frameworks/Python.framework/Versions/2.4/lib/
> python2.4/site-packages/scipy/fftpack/__init__.py", line 10, in ?
>      from basic import *
>    File "/Library/Frameworks/Python.framework/Versions/2.4/lib/
> python2.4/site-packages/scipy/fftpack/basic.py", line 13, in ?
>      import _fftpack as fftpack
> ImportError: Failure linking new module: /Library/Frameworks/
> Python.framework/Versions/2.4/lib/python2.4/site-packages/scipy/
> fftpack/_fftpack.so: Symbol not found: _fprintf$LDBLStub

> ..........
> Does anyone have thoughts on what could be going wrong?

This is caused by trying to link object code files and or static  
libraries produced by different versions of gcc.  It will go away if  
you ensure that all objects are compiled either with gcc-3.x/g77 or  

It does not matter what compiler is used for linked dynamic  
libraries, which is why they are preferred.

Bill Northcott

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