Linking against static library in specific path

[Nahuel Defossé]

I'm trying to wrap some existing C++ code which is compiled and bundled in static .a libraries.

I've followed the guide exposed at http://wiki.cython.org/WrappingCPlusPlus and I wrote down this

setup.py file:

from distutils.core import setup

from distutils.extension import Extension

from Cython.Distutils import build_ext

setup(

  name = 'ipcbus',

  ext_modules=[

    Extension("ipcbus",

              sources=["ipcbus.pyx", "../lib/ipcbus/ipcbus_message.cpp"], # Note, you can link against a c++ library instead of including the source

              include_dirs=["../lib/ipcbus"],

              libraries = ["../lib/ipcbus.a",],

              #extra_link_args = ["../lib/libipcbus.a",],

              language="c++"),

    ],

  cmdclass = {'build_ext': build_ext},

)

Am I getting something wrong? libipcbus.a is a static lib, and though it compiles fine, I get some undefined symbols errors.

The library, as the above text shows is located in ../lib/.

Thanks

[Nahuel Defossé]

I found the answer, I had to add extra_objects to the Extension call, like this:

setup(

  name = 'ipcbus',

  ext_modules=[

    Extension("ipcbus",

              sources=["ipcbus.pyx", "../lib/ipcbus/ipcbus_message.cpp"], # Note, you can link against a c++ library instead of including the source

              include_dirs=["../lib/ipcbus"],

              libraries = ["../lib/ipcbus.a",],

              language="c++",

              extra_objects=["../lib/libipcbus.a"],),

    ],

  cmdclass = {'build_ext': build_ext},

)

I found the answer in Stackoverflow: http://stackoverflow.com/questions/2105508/wrap-c-lib-with-cython

Sorry for bothering you

2010/12/13 Nahuel Defossé <nahuel....@gmail.com>

[Lisandro Dalcin]

2010/12/13 Nahuel Defossé <nahuel....@gmail.com>:
> I found the answer, I had to add extra_objects to the Extension call, like
> this:
> setup(
>   name = 'ipcbus',
>   ext_modules=[
>     Extension("ipcbus",
>               sources=["ipcbus.pyx", "../lib/ipcbus/ipcbus_message.cpp"], #
> Note, you can link against a c++ library instead of including the source
>               include_dirs=["../lib/ipcbus"],
>               libraries = ["../lib/ipcbus.a",],
>               language="c++",
>               extra_objects=["../lib/libipcbus.a"],),
>     ],
>   cmdclass = {'build_ext': build_ext},
> )
> I found the answer in
> Stackoverflow: http://stackoverflow.com/questions/2105508/wrap-c-lib-with-cython
> Sorry for bothering you
>

Are you sure you need "libraries = ["../lib/ipcbus.a",]" ??

--
Lisandro Dalcin
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