我在Mac OS X 10.9上通过Macports安装了Boost 1.55（+ python33），boost-build和boost-jam。
在HOWTO（http://www.boost.org/doc/libs/1_55_0b1/libs/python/doc/building.html）之后，我
cd到/ opt / local / share / doc / boost / libs / python / example / quickstart并在bjam toolset=gcc
--verbose-test test和bjam中键入，我收到以下错误消息：
/opt/local/share/boost-build/build/project.jam:271: in find-jamfile from module project
error: Unable to load Jamfile.
error: Could not find a Jamfile in directory '../../../..'.
error: Attempted to find it with pattern '[Bb]uild.jam [Jj]amfile.v2 [Jj]amfile [Jj]amfile.jam'.
error: Please consult the documentation at 'http://www.boost.org'.
/opt/local/share/boost-build/build/project.jam:290: in load-jamfile from module project
/opt/local/share/boost-build/build/project.jam:68: in project.load from module project
/opt/local/share/boost-build/build/project.jam:718: in project.use from module project
/opt/local/share/boost-build/build/project.jam:95: in load-used-projects from module project
/opt/local/share/boost-build/build/project.jam:79: in load from module project
/opt/local/share/boost-build/build/project.jam:170: in project.find from module project
/opt/local/share/boost-build/build-system.jam:248: in load from module build-system
/opt/local/share/boost-build/kernel/modules.jam:261: in import from module modules
/opt/local/share/boost-build/kernel/bootstrap.jam:132: in boost-build from module
/opt/local/share/doc/boost/libs/python/example/quickstart/boost-build.jam:8: in module scope from module
显然，Macports将这些文件放在一些“非默认”位置。例如，boost-build目录（在boost-build.jam中指定）位于/opt/local/share/doc/boost/tools/build/v2中。在文件Jamroot中：
# Specify the path to the Boost project. If you move this project,
# adjust the path to refer to the Boost root directory.
use-project boost
: ../../../.. ;
显然，在Macports安装中，所需的jamefile不在../../../..中。
我的问题是：在Macports安装的boost中所需的jamefile在哪里？我应该在Jamroot中指定哪条路径？