embedded python on mac - linking problem

[Benjamin Kaplan]

On Tue, Jan 5, 2010 at 7:33 AM, Krzysztof Kobus <kk720801 at yahoo.com> wrote:
> Hi,
>
> I have a problem with linking python module with my application on mac in order to make the module available in "embedded python".
>
> My python module is contained in  j3kmodule.cxx file and module initialization function is exported in j3kmodule.h
>
> j3kmodule.h:
> ------------
> PyMODINIT_FUNC PyInit_j3k(void);
>
>
> j3kmodule.cxx:
> --------------
> PyMODINIT_FUNC
> PyInit_j3k(void)
>  {
>  PyObject *m = NULL;
>
>  if ((m = PyModule_Create(&j3k_module)) == NULL)
>    return NULL;
>
>  return m;
>  }
>
>
> Then in my application in KkPython.cxx file I have:
>
> KkPython.cxx:
> -------------
>
> #include "j3kmodule.h"
>
> /* Add a builtin module, before Py_Initialize */
> PyImport_AppendInittab("j3k", PyInit_j3k);
>
>
> I link my application with the module and get following linking error on mac although on open suse linux exactly the same procedure works fine:
>
> g++ -headerpad_max_install_names -o ../../bin/render.app/Contents/MacOS/render main.o KkPython.o -lkkbase -L/Users/kk/dev/J3K/trunk/j3ksrc/examples/render/../../lib/ -lQtSolutions_PropertyBrowser-2.5 -lpython3.1 /Users/kk/dev/J3K/trunk/j3ksrc/python/modules/build/lib.macosx-10.3-i386-3.1/j3k.so -framework OpenGL -framework AGL
> ld: warning in /Users/kk/dev/J3K/trunk/j3ksrc/python/modules/build/lib.macosx-10.3-i386-3.1/j3k.so, file is not of required architecture
> Undefined symbols:
>  "_PyInit_j3k", referenced from:
>      _PyInit_j3k$non_lazy_ptr in KkPython.o
> ld: symbol(s) not found
> collect2: ld returned 1 exit status
> make: *** [../../bin/render.app/Contents/MacOS/render] Error 1
>
>
> I appreciate any hints,
>
> best greetings,
>
> Krzysztof Kobus
>

Well, it seems that one of your files is a different architecture than
the others. Based on the location, I'd say it's i386 while the rest of
it would be PowerPC. You can cross-compile but you can't link an i386
library to a PowerPC library.