python extend c++ module

Shen, Yu-Teh shenyute at gmail.com
Tue Jun 30 12:54:35 CEST 2009


I have written a c++ extend module and I use distutils to build.

setup.py
----------------
from distutils.core import setup, Extension

setup(name="noddy", version="1.0",
      ext_modules=[
         Extension("noddy3", ["noddy3.cpp", "a.cpp"])
         ])

I found it's quite strange when compiling. I didn't use extern "C" at
all
, how can python get the right c++ funciton name without any compile
error??

I found that it first use gcc to compile noddy3.cpp and then link by g+
+.

Could anyone explain what it's all about?
Thanks a lot!!


here is the compiling message.
---------------------------------------
running install

running build

running build_ext
building 'noddy3' extension

gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O3 -Wall
-Wstrict-prototypes -fPIC -I/usr/local/include/python2.6 -c noddy3.cpp
-o
build/temp.linux-i686-2.6/noddy3.o

cc1plus: warning: command line option "-Wstrict-prototypes" is valid
for
Ada/C/ObjC but not for C++
g++ -pthread -shared build/temp.linux-i686-2.6/noddy3.o
build/temp.linux-i686-2.6/a.o -o build/lib.linux-i686-2.6/noddy3.so
build/temp.linux-i686-2.6/a.o -o build/lib.linux-i686-2.6/noddy3.so
running install_lib

copying build/lib.linux-i686-2.6/noddy3.so ->
/usr/local/lib/python2.6/site-packages

running install_egg_info

Removing /usr/local/lib/python2.6/site-packages/noddy-1.0-py2.6.egg-
info

Writing /usr/local/lib/python2.6/site-packages/noddy-1.0-py2.6.egg-info



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