We have this situation(remember that the source code is from the book API C++ design www.apibook.com):
Source code: - phonebook.h - phonebook.cpp - phonebook_wrap.cpp Boost is download, compiled and installed into: - /Desktop/boost_1_48_0/compilation/ which means that /include and /lib are the subfolders of this with all the headers and libraries into it. Now: g++ -c phonebook.cpp (compiles only phonebook.cpp, without error) g++ -c phonebook_wrap.cpp -I<boost_includes> -I<python_include> (compiles the wrapper against the /include subfolder mentioned before and the python2.7 headers in /usr/...) g++ -shared -o phonebook.so phonebook.o phonebook_wrap.o -lboost_python -lpython (links the objects agains the /lib subfolder mentioned before and and python2.7 libraries in /usr/...) After this I get the phonebook.so shared library, but when I try to import it in python I get the error: Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: ./phonebook.so: undefined symbol: _ZN5boost6python6detail11init_moduleEPKcPFvvE Hope this can help better to understand (maybe) what is going on. Again, I follow the same procedure after installing the precompiled packages from Ubuntu using synaptic, and the same error. Hope that somebody can help. 2011/11/25 Jim Bosch <tallji...@gmail.com> > On 11/25/2011 06:54 AM, Edgardo C. wrote: > >> Hello everybody, >> >> I am having problems with importing a .so shared library I just compiled >> following the example giving in the book: >> API Design for C++ : www.apibook.com <http://www.apibook.com> (Chapter >> 11) >> >> >> I downloaded the Boost library and I compiled it (fullw) into a >> subdirectory called /compilation, where I get the /include and /lib >> directories. No error during the compilation (Ubuntu 11.10). >> Then I downloaded the code from the book examples and I compiled it >> without errors and I get the phonebook.so in the same directory as where >> I launch python interpreter, but the import in python trigger this error: >> >> >> ImportError: /home/pablo/phonebook/**phonebook.so: undefined symbol: >> _ZN5boost6python6detail11init_**moduleEPKcPFvvE >> >> what I think is because python does not find the library. >> >> I try to play around with the LD_LIBRARY_PATH variable, ldconfig, I >> copied the phonebook.so library into /usr/lib and /usr/local/lib, and >> nothing ... I get the same error. >> >> Can anybody explain me what is the problem? thanks a lot in advance, >> >> > I think you just need to link your library against the boost_python > library, and make sure that's also somewhere on your dynamic library path. > With gcc, that means adding a "-lboost_python" to the command line options. > > Jim > > ______________________________**_________________ > Cplusplus-sig mailing list > Cplusplus-sig@python.org > http://mail.python.org/**mailman/listinfo/cplusplus-sig<http://mail.python.org/mailman/listinfo/cplusplus-sig> >
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