On 2009-12-10 17:09 PM, hardcoreUFO wrote:
For the past several weeks, I have been unable to build numpy from
source, at least nothing that works. The issue is that symbols appear
to be missing from umath. When numpy is imported, I get the following:

You will want to ask numpy questions on the numpy mailing list:

  http://www.scipy.org/Mailing_Lists

In [1]: import numpy
------------------------------------------------------------
Traceback (most recent call last):

   File "/Library/Python/2.6/site-packages/numpy-1.5.0.dev_20091211-
py2.6-macosx-10.6-universal.egg/numpy/core/__init__.py", line 6, in
<module>
     import umath
ImportError: dlopen(/Library/Python/2.6/site-packages/
numpy-1.5.0.dev_20091211-py2.6-macosx-10.6-universal.egg/numpy/core/
umath.so, 2): Symbol not found: _npy_cexp
   Referenced from: /Library/Python/2.6/site-packages/
numpy-1.5.0.dev_20091211-py2.6-macosx-10.6-universal.egg/numpy/core/
umath.so
   Expected in: flat namespace
  in /Library/Python/2.6/site-packages/numpy-1.5.0.dev_20091211-py2.6-
macosx-10.6-universal.egg/numpy/core/umath.so

I think my build script is good, but here it is just incase:

#!/bin/sh
export MACOSX_DEPLOYMENT_TARGET=10.6
export CFLAGS="-arch x86_64"
#export FFLAGS="-arch i386 -arch x86_64"
export FFLAGS="-arch x86_64"
export LDFLAGS="-Wall -lgfortran -undefined dynamic_lookup -bundle -
arch x86_64"
rm -rf build
python setup.py config -L/Users/fonnesbeck/Code/freetype -L/Users/
fonnesbeck/Code/libpng build
python setupegg.py egg_info --tag-date bdist_egg

I'm at my wits end with this one, so any help at all is most
appreciated.

Don't specify LDFLAGS if you don't have to. It is obliterating the -l flag for the npy_math library that numpy builds internally and tries to link with.

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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