John Machin a écrit :
Jean-Baptiste PERIN wrote:
Hi,
I'm trying to make a windows dll reachable from a python script ..
and
I'm encountering troubles during link step ..
I use "lcc" to compile and link I use python 2.3 under win XP
[snip]
Here are the errors : --------------------- Error c:\...\plugins\hello.c 14 undefined reference to
__imp__Py_BuildValue
Error c:\...\plugins\hello.c 46 undefined reference to
__imp__Py_InitModule4 [snip]
return Py_BuildValue("i", 1);
[snip]
void __declspec(dllexport) inithello() { (void)Py_InitModule3("hello", helloMethods, MHello__doc__); Can anyone help me?
Yes. Option 1: *Maybe* you can help yourself. Have you not noticed from the above that the compiler is magically prepending "__imp__" to the names of external functions? However the .lib that comes with Python won't have that "__imp__". You would have to bridge that gap, somehow. Have you searched the lcc documentation? Are you prepared for the next several problems that may arise?
Indeed, it's something I can't understand (the __imp__ stuff).. Nothing appear about that in the I have posted a question on lcc forum .. the author of lcc answered
"This happens because somewhere you are declaring the functions Py_BuildValue and Py_InitModule
as __declspec(dllimport) "
He's right !! He adviced me to change that .. I don't want to make changes to python code .. so .. bye bye lcc
long life to gcc
By the way, lcc also *appears* to change "...Module3" to "...Module4" :-)
this one is explainable to me .. it is due to the fact that both function are equivalent
in mod support.h:
#define Py_InitModule3(name, methods, doc) \
Py_InitModule4(name, methods, doc, (PyObject *)NULL, \
PYTHON_API_VERSION)Option 2: You have been helped already. There are two free compilers which work quite well for developing extensions in C for win32 platforms; start reading here:
http://docs.python.org/inst/tweak-flags.html#SECTION000620000000000000000
I'm currently attracted by the cygwin solution .. that I find very sexy !! If I fail .. I will explore the MingW ..
Thank you very much for helping me .. -- http://mail.python.org/mailman/listinfo/python-list
