SIP Python/C++ binding fails to compile for simple example - c++

Question

After successfully compiling a Python/C binding with SIP I wanted to do the same thing with Python/C++. For some reason this doesn't work.
Here's the files:
fib.cpp
#include "fib.h"
int fib1(int n)
{
if (n <= 0) {
return 0;
} else if (n <= 2) {
return 1;
} else {
return fib1(n-1) + fib1(n-2);
}
}
fib.h
int fib1(int n);
fib.sip
%Module fib
%Include fib.h
I run the following command to build the intermediate files:
sip -c . fib.sip
So far everything works.
Now I want to build the .pyd file using distutils.
setup.py
from distutils.core import setup, Extension
import sipdistutils
setup(
name = 'fib',
versione = '1.0',
ext_modules=[
Extension("fib", ["fib.sip", "fib.cpp"]),
],
cmdclass = {'build_ext': sipdistutils.build_ext}
)
I run the following command:
python setup.py build
This fails with the following error:
build\temp.win32-2.7\Release\sipfibcmodule.cpp:29:29: error: 'fib1' was not declared in this scope
error: command 'gcc' failed with exit status 1
What could the problem be? Shouldn't c++ be used as a compiler instead of gcc, by the way?
Any help appreciated!
Kind regards
David

Answer 1

I've found a solution that is good enough: namespaces. Next time I'll read the documentation better. I should also mention that a solution with a Fibonacci class could solve the problem, but I didn't find that to be satisfying.
Below the content of the files can be found.
fib.cpp
#include "fib.h"
namespace test
{
int fib1(int n)
{
if (n <= 0) {
return 0;
} else if (n <= 2) {
return 1;
} else {
return fib1(n-1) + fib1(n-2);
}
}
}
fib.h
namespace test
{
int fib1(int n);
}
fib.sip
%Module fib
namespace test {
%TypeHeaderCode
#include "fib.h"
%End
int fib1(int n);
};
setup.py - nothing was changed
Exactly the same commands as mentioned before were used.