boost 1.39.0_2 with +python25 links against wrong python

[max@…]

Building boost with python2.5 support and using it's python extension capabilities results in a crash with the error message

Fatal Python error: Interpreter not initialized (version mismatch?)

This is caused by boost linking against the system python framework instead of MacPort's python25

otool -L /opt/local/lib/libboost_python-mt.dylib
/opt/local/lib/libboost_python-mt.dylib:
	/opt/local/lib/libboost_python-mt.dylib (compatibility version 0.0.0, current version 0.0.0)
	/System/Library/Frameworks/Python.framework/Versions/2.5/Python (compatibility version 2.5.0, current version 2.5.1)
	/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.4.0)
	/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.4)

[nox@…]

What does port installed python25 report?

[max@…]

port installed python25
The following ports are currently installed:
  python25 @2.5.4_3+darwin_9+macosx
  python25 @2.5.4_4+darwin_9+macosx
  python25 @2.5.4_6+darwin_9+macosx (active)

[jmroot (Joshua Root)]

Duplicate of #17998.