This question is related to a couple of questions in SO like this one and this other one. Unfortunately the solution there is not working for me so far. I have a module.pxc file which I am compiling by a setup.py file, such as the following one:
# setup.py
module_extension = Extension(
name="iolif",
sources=["/home/maurizio/Ongoing.Projects/c_libraries/dcomplex_libc.c",
"/home/maurizio/Ongoing.Projects/c_libraries/special_functions_libc.c",
"/home/maurizio/Ongoing.Projects/c_libraries/models/freq_cv_libc.c",
"module.pyx"],
libraries=['gsl', 'gslcblas', 'm'],
# library_dirs=["lib"],
include_dirs=["/home/maurizio/Ongoing.Projects/pycustommodules",
"/home/maurizio/Ongoing.Projects/c_libraries",
"/home/maurizio/Ongoing.Projects/c_libraries/models"]
)
setup(
name="iolif",
ext_modules=cythonize([module_extension])
)
From command line, in the same directory of module.pxc, when writing python setup.py build_ext --inplace compilation works fine, and the iolif.so library is produced. The issue is that I can only import this library if I use Python2.7, whereas if I attempt to import it in Python3.x I get the known ImportError: dynamic module does not define module export function (PyInit_iolif).
Googling around, and as pointed out in the two questions linked above, it seems that this is due to the fact that cython is looking at Python2.7 rather than Python3.x (which is the one I work with instead). Accordingly, I attempted asking cythonize in my setup.py to use Python3.x by:
...
setup(
name="iolif",
ext_modules=cythonize([module_extension],
compiler_directives={'language_level': "3"})
)
but it still does not work. The last compilation message indeed produces:
gcc -pthread -shared -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -
specs=/usr/lib/rpm/redhat/redhat-hardened-ld build/temp.linux-x86_64-2.7/pylif_io.o
build/temp.linux-x86_64-2.7/home/maurizio/Ongoing.Projects/c_libraries/dcomplex_libc.o
build/temp.linux-x86_64-2.7/home/maurizio/Ongoing.Projects/c_libraries/special_functions_libc.o build/temp.linux-x86_64-2.7/home/maurizio/Ongoing.Projects/c_libraries/models/freq_cv_libc.o -L/usr/lib64
-lgsl -lgslcblas -lm -lpython2.7 -o /home/maurizio/Ongoing.Projects/DePitta.PNAS/Software/LIF.Analysis/iolif.so
where you can see that it is still linking with the -lpython2.7 library (whereas it should use for example -lpython3.7m). How do I solve it? What am I missing?
