Swig-Python problems

[matteo]

Hi, I've got a problem with SWIG and Python2.2.I've installed the
SWIG1.3.21 releaseunder QNX6.2 platform .I tried to make the exemple
example.c (in the directory ../Swig/Exemple/python/simple)
/* File : example.c */

#include <time.h>
double My_variable = 3.0;

int fact(int n) {
if (n <= 1) return 1;
else return n*fact(n-1);
}

int my_mod(int x, int y) {
return (x%y);
}

char *get_time()
{
time_t ltime;
time(&ltime);
return ctime(&ltime);
}.
After the commans:

swig -python example.i
gcc -c example.c example_wrap.c -I/usr/local/python2.2
ld -shared example.o example_wrap.o -o _example.so

I use Python module as follows
[color=blue][color=green][color=darkred]
>>> import example[/color][/color][/color]

and I've got the message: "Memory falut (core dumped)"
What can I do??

[Joe Mason]

Re: Swig-Python problems

In article <cdb8761d.04031 50739.5de0fee4@ posting.google. com>, matteo wrote:[color=blue]
> Hi, I've got a problem with SWIG and Python2.2.I've installed the
> SWIG1.3.21 releaseunder QNX6.2 platform .I tried to make the exemple
> example.c (in the directory ../Swig/Exemple/python/simple)
> /* File : example.c */
>
> #include <time.h>
> double My_variable = 3.0;
>
> int fact(int n) {
> if (n <= 1) return 1;
> else return n*fact(n-1);
> }
>
> int my_mod(int x, int y) {
> return (x%y);
> }
>
> char *get_time()
> {
> time_t ltime;
> time(&ltime);
> return ctime(&ltime);
> }.
> After the commans:
>
> swig -python example.i
> gcc -c example.c example_wrap.c -I/usr/local/python2.2
> ld -shared example.o example_wrap.o -o _example.so
>
> I use Python module as follows
>[color=green][color=darkred]
> >>> import example[/color][/color]
>
> and I've got the message: "Memory falut (core dumped)"
> What can I do??[/color]

I've found on Linux that it's easy to run the entire Python interpreter
under a debugger. I'm not familiar with the tools on QNX, but I would
add "-g" to the gcc line (to add debugging symbols), and then run "gdb
python", so that when the program crashes you can see exactly where.

(If you're not familiar with gdb, type "run" at the first prompt, and
then use the interpreter as normal, and when the crash happens and you
get back to the gdb prompt, type "bt" to get a backtrace. This should
be all you need to get started.)

Joe

[Armin Steinhoff]

Re: Swig-Python problems

m.finardi@itia. cnr.it (matteo) wrote in message news:<cdb8761d. 0403150739.5de0 fee4@posting.go ogle.com>...[color=blue]
> Hi, I've got a problem with SWIG and Python2.2.I've installed the
> SWIG1.3.21 releaseunder QNX6.2 platform .I tried to make the exemple
> example.c (in the directory ../Swig/Exemple/python/simple)
> /* File : example.c */
>
> #include <time.h>
> double My_variable = 3.0;
>
> int fact(int n) {
> if (n <= 1) return 1;
> else return n*fact(n-1);
> }
>
> int my_mod(int x, int y) {
> return (x%y);
> }
>
> char *get_time()
> {
> time_t ltime;
> time(&ltime);
> return ctime(&ltime);
> }.
> After the commans:
>
> swig -python example.i
> gcc -c example.c example_wrap.c -I/usr/local/python2.2[/color]

At first ... please use qcc and not gcc.

qcc -c -fPIC example.c example_wrap.c -I/usr/local/python2.2

should work ...
[color=blue]
> ld -shared example.o example_wrap.o -o _example.so
>
> I use Python module as follows
>[color=green][color=darkred]
> >>> import example[/color][/color]
>
> and I've got the message: "Memory falut (core dumped)"
> What can I do??[/color]

... use Pyrex :)

Armin Steinhoff

[Pierre Rouleau]

Re: Swig-Python problems

matteo wrote:
[color=blue]
> Hi, I've got a problem with SWIG and Python2.2.I've installed the
> SWIG1.3.21 releaseunder QNX6.2 platform .I tried to make the exemple
> example.c (in the directory ../Swig/Exemple/python/simple)
> /* File : example.c */
>
> #include <time.h>
> double My_variable = 3.0;
>
> int fact(int n) {
> if (n <= 1) return 1;
> else return n*fact(n-1);
> }
>
> int my_mod(int x, int y) {
> return (x%y);
> }
>
> char *get_time()
> {
> time_t ltime;
> time(&ltime);
> return ctime(&ltime);
> }.
> After the commans:
>
> swig -python example.i
> gcc -c example.c example_wrap.c -I/usr/local/python2.2
> ld -shared example.o example_wrap.o -o _example.so
>
> I use Python module as follows
>[color=green][color=darkred]
> >>> import example[/color][/color]
>
> and I've got the message: "Memory falut (core dumped)"
> What can I do??[/color]

What does your interface space file (examplei.i) contain?