> > Message: 2 > Date: Fri, 26 Feb 2010 18:36:16 -0800 > From: Dane Springmeyer <bl...@hailmail.net> > To: Development of Python/C++ integration <cplusplus-sig@python.org> > Subject: Re: [C++-sig] incorrect linking to libpython > Message-ID: <57569986-7d90-4686-8384-809f8d27f...@hailmail.net> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes > > Amos, > > I feel your pain, seriously. I've been down many of these paths as well. > > My overall sense is that direct linking of boost to a python > executable may not be necessary, and rather that bjam could use `- > undefined dynamic_lookup`, which will mean that when you import the > python module you've built with boost::python the right version of > python will be dynamically looked up based on the interpreter you are > running. There are certainly potential problems with this route (and > I've only lightly tested so far) but I think it may hold promise. > > More to the point, I've also got into the habit of passing -Z to the > linker to make sure that if the custom python framework is not able to > be linked, ld does not fallback to linking to the "system" or apple > provided python framework and rather throws an error so you know the > exact point things went wrong rather than only later by getting the > dreaded "Version Mismatch" error. > > Failing to link to the /Library or user installed python26 is almost > invariably the case on snow leopard because two copies will exist and > the user installed version won't be preferentially linked with the > normal -L/path/to/dir -lpython2.6 method because 'libpython2.6' is > actually: > > /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/config/ > libpython2.6.a > > and my sense is the linker will prefer the /usr/lib/libpython2.6.dylib > over that because of the 'a' (even though it is actually, and oddly, a > symlink to the dynamic library at: > > /Library/Frameworks/Python.framework/Versions/2.6/Python > > So, one workaround is symlinking: > > /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/config/ > libpython2.6.dylib -> ../../../Python > > Then bjam should be able to find it. > > But I think a preferable method would be if bjam actually sent the > linker line: > > -F/Library/Library/Frameworks -framework Python -Z > > instead of -L/etc/etc -lpython... > > > Dane > > > More info on those ld commands at: > http://developer.apple.com/mac/library/DOCUMENTATION/Darwin/Reference/ManPages/man1/ld.1.html
I can confirm that your solution fixed the problem. Actually, I just did this: sudo cp libpython2.6.a libpython2.6.dylib (and recompiled boost python) Thanks! Amos. _______________________________________________ Cplusplus-sig mailing list Cplusplus-sig@python.org http://mail.python.org/mailman/listinfo/cplusplus-sig
