Help with Boost Python to wrap C++ functions

[patmo141]

My immediate goal is to just get a c++ ‘hello world’ available in my standard python as per the getting started examples (boost.org)…then later, get it in the blender python as this person was able to do

http://www.blender.org/forum/viewtopic.php?t=17212&sid=afa426981f8a68dd3b444fa33cf64904

later, it would be cool to attempt it with something more complicated, but for now, I can’t seem to get past the most basic of steps.

The problem(s) is(are) as follows…this is probably overly detailed and meant for a different forum but since the end goal is Blender, I figured I would document my struggles so that others may learn from them.

Win 7 Pro 64 bit
MS Visual Studio 2008
Python 3.2 64 bit in C:\Python32
downloaded the boost libraries, unpacked to C:\dev\boost_1_46_1
bootsrap to set up bjam

following all the instructions here:

(getting set up with boost)…accomplished both the examples!
http://www.boost.org/doc/libs/1_46_1/more/getting_started/windows.html

(building boost python specifically)…some difficulty, possible culprit

http://www.boost.org/doc/libs/1_46_1/libs/python/doc/building.html
http://www.boost.org/doc/libs/1_46_1/libs/python/doc/tutorial/doc/html/index.html

I couldn’t build boost python at first (literally all other libraries build fine except python) until I found this link (in Chinese but translated well enough for me to follow the direction).

http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://blog.csdn.net/masterz/archive/2011/03/08/6232585.aspx&ei=rzvUTankLM6dgQeVprEu&sa=X&oi=translate&ct=result&resnum=2&ved=0CCMQ7gEwAQ&prev=/search%3Fq%3Derror%2BC2664:%2B%27PyUnicodeUCS2_AsWideChar%27%2B:%2Bcannot%2Bconvert%2Bparameter%2B1%2Bfrom%2BPyUnicodeObject%2Bto%2BPyObject%26hl%3Den%26prmd%3Divns

I made all of those edits except adding

: <python-debugging> Off <define> BOOST_ALL_NO_LIB = 1 

to my user-config.jam because it caused an error during building and I couldn’t figure out what it was for (another suspect for my problems). After that , everything(?) built fine. Now when I do my hello world project, i get a few errors associated with not linking things properly and not being able to find the appropriate .lib file. (see attachment boost_error_old if interested) I google some more. I find this thread

http://comments.gmane.org/gmane.comp.lib.boost.user/67879

I follow these directions and make sure I have built the non static libraries which solves the previous error after I update my linking appropriately. So, now I get a new error which is the same error which the changes in the blog post written in chinese were supposed to prevent!? Any thoughts?

Here, you can see the commands I used to build my boost python libs (i just replaced them in the command line after it had finished), the chunk of code which I edited as per the blog post, as well as the errors I received when trying to build.

also, my MSVC solution Active config is Release|x64

Attachments

[patmo141]

more clues…

LuxRender building requires boost.python. This video is for linux users but it has some of the same edits to the boost python source. 17:00-20:00 when this user is configuring boost is the relevant part. They use boost 1.43…that might be my next attempt.

[patmo141]

I’m completely editing this post to make it more clear and to add screen shots.

-I downloaded boost 1.43.0, unpacked as before
-edited builtin_converters.cpp as before (line 434) (highlighted in MSVC 2008 window in screenshot)
-then built the boost python library with the bjam invocation (see the cmd prompt overlaid on top of MSVC 2008 project for my settings)
-changed the appropriate include and linker directories to point toward the 1.43.0 libraries
-changed the “Configuration Type” of my project to “Dynamic Library”
-built the DLL successfully for my hello world

-In Python

import hello_ext

doesn’t work. How do I alert python to the fact that I have spent all this trouble wrapping this C++ code and now want to import my module?