BUG: Extension building problems with Python distutils

[artur_spruce@…]

There are the following problems with building a Python extension using distutils:

1. By default, distutils from the darwinports install of Python doesn't look for headers and libraries in

the darwinports installation directory. (I don't know if that is correct or not.)

2. With "include_dirs = opt/local/include?" and "library_dirs = opt/local/lib?" in the extension

definition, the linker attempts to reference the standard Python installation libraries:

$ python setup.py build running build running build_ext building 'times' extension creating build/temp.darwin-7.9.0-Power_Macintosh-2.4 gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd -fno-common -fno- common -dynamic -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I/opt/local/include -I/opt/local/ Library/Frameworks/Python.framework/Versions/2.4/include/python2.4 -I/opt/local/include/ python2.4 -c times.cpp -o build/temp.darwin-7.9.0-Power_Macintosh-2.4/times.o c++ -bundle -undefined dynamic_lookup build/temp.darwin-7.9.0-Power_Macintosh-2.4/times.o -L/ opt/local/lib -lboost_python -o build/lib.darwin-7.9.0-Power_Macintosh-2.4/times.so ld: build/temp.darwin-7.9.0-Power_Macintosh-2.4/times.o illegal reference to symbol: _PyFloat_FromDouble defined in indirectly referenced dynamic library /System/Library/Frameworks/ Python.framework/Versions/2.3/Python error: command 'c++' failed with exit status 1

[artur_spruce@…]

Test extension module - C source

[artur_spruce@…]

Test extension module - build script

[artur_spruce@…]

This seems to be a problem somehow related to bug #6116. Apparently, the libboost_python.dylib library is built incorrectly.

I built a simple extension module based on the "Extending and Embedding..." manual for Python. Please see the attached sources. It builds and works correctly. If you uncomment the "libraries" and "library_dirs" parameters, you get a linking error like the one above.

[mww@…]

* This bug has been marked as a duplicate of 6116 *