[C++-sig] Problems building boost.python with python-debugging

[David Abrahams]

on Tue Sep 04 2007, Roberto Delfiore <roberto.delfiore-AT-srlabs.it> wrote:

> I'm developing a C++ Windows Application using VC++ 2005, I need to have 
> a version of boost.python that uses only debug runtime environment. 
> Python25.dll needs msvcrt.dll release runtime environment.
> Being a big project, in debug build I've problems mixing debug and 
> release dlls runtime environments.
>
> - I've rebuild python in debug (python_d) using Visual Studio.
>
> - I've created "user-config.jam" file in my home dir, the file content is:
> using python : 2.5 : F:\\src\\custom_python-vc80-2_5
>   : # includes
>   : # libs
>   : <python-debugging>on ;
>
> - I've rebuild boost-python using bjam toolset=msvc --debug-configuration
>         This generates a link error:
>         "undefined symbol Py_InitModule4"

That's because you didn't turn python-debugging on for that build.
Try

     bjam toolset=msvc python-debugging=on --debug-configuration

       
> In python 2.5 sources Include/modsupport.h
> - I've commented out:
> #define Py_InitModule4 Py_InitModule4TraceRefs

Whoa, never modify the Python sources.

> Why boost.python build doesn't know that using "python debugging", 
> Py_InitModule4 is renamed????
>
> - I've rebuild boost-python
> Linking OK!!

You broke modsupport.h, and you shouldn't expect anything to work from
here on, even if linking succeeds.

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com

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