[Boost-users] bjam only finding system python on mac

From: David Philp (david.philp_at_[hidden])
Date: 2008-08-15 02:52:48

I am trying to write a python extension for the Python that comes with  
Sage (Sage bundles its own Python).  My user-config.jam is supposed to  
direct bjam to the Sage version of Python, but whatever I do, it links  
to the System Python.

I think my configuration is correct, because if I (as root) move the  
System Python.framework so that bjam cannot find it, I can compile a  
working extension.  ("Working" in the sense that it can be loaded into  
Sage's python, and runs perfectly.)

Otherwise (without hiding System Python), the extension compiles just  
fine, but cannot be loaded into the Sage version of python.  When  
loaded into Sage's python, it fails with "Fatal Python error:  
Interpreter not initialized (version mismatch?)" which seems  
reasonable.  The extension can be loaded into the System Python.

Here are the details.  I've used "Sage_root" for the base directory of  
Sage to make this a bit more readable.  (It is actually /Users/dphilp/ 
sage-3.0.3.):
boost 1.35.0
sage 3.0.3, which contains
python 2.5.2p2 (slightly patched for sage, and is built using
--enable-framework=Sage_root/local/Frameworks/Python.framework )
Everything seems to work fine, Sage's doctests run perfectly, etc.

In user-config.jam (this is overkill, but I wanted to remove any  
possible ambiguity):
using python
   : 2.5
   : Sage_root/local/Frameworks/Python.framework/Versions/2.5/bin/python
   : Sage_root/local/Frameworks/Python.framework/Versions/2.5/include/ 
python2.5
   : Sage_root/local/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/config ;

bjam --debug-configuration reports that it is using the requested  
version of python, i.e. the one inside Sage.

Using --with-python=... on the command line does not help.

When I use --debug-building, there is no hint of the System  
Python.framework anywhere.  But when I run otool -L my_ext.so, it  
reports that the extension is linked to the System framework---that  
is, unless I hide the System framework, in which case it reports that  
it is linked to the Sage framework.

This seems to me to be a bug in bjam, but I would appreciate any help  
either way.  (Moving the System's python doesn't seem to be a good  
long term solution!)

Thanks in advance for any answers or redirections.

David

==================================
David J Philp
Postdoctoral Fellow
National Centre for Epidemiology and Population Health
Building 62, cnr Mills Rd & Eggleston Rd
The Australian National University
Canberra ACT 0200 Australia

T: [phone]
F: [phone]
M: 0423 535 397
W: http://nceph.anu.edu.au/

CRICOS Provider #00120C