gistfile1.txt

/usr/local/share/boost-build/build/toolset.jam:38: in toolset.using
*** argument error
* rule pb.init ( prefix : condition * )
* called with: (  :  :  :  :  :  :  :  )
* missing argument prefix
/Users/tom/src/git/spacemonkey/client/native/src/protos/pb.jam:44:see definition of rule 'init' being called
/usr/local/share/boost-build/build/project.jam:888: in using
src/protos/Jamfile:1: in modules.load
/usr/local/share/boost-build/build/project.jam:314: in load-jamfile
/usr/local/share/boost-build/build/project.jam:62: in project.load
/usr/local/share/boost-build/build/project.jam:766: in project.use
/usr/local/share/boost-build/build/project.jam:89: in load-used-projects
/usr/local/share/boost-build/build/project.jam:73: in load
/usr/local/share/boost-build/build/project.jam:168: in project.find
/usr/local/share/boost-build/build-system.jam:570: in load
/usr/local/share/boost-build/kernel/modules.jam:283: in import
/usr/local/share/boost-build/kernel/bootstrap.jam:142: in boost-build
/usr/local/share/boost-build/boost-build.jam:8: in module scope

For those who hit this from Google, check the following:

1. ~/user-config.jam exists and is what it should be
2. you spelled it correctly :)