Pb with threads on Mac OS X Carbon.

Hi, I'd like to use shared pointers with CodeWarrior 8.3 in a Carbon application. I have some preprocessing errors, the first one being relative to a thread Macro being undefined: lightweight_mutex.hpp line 86 # error Unrecognized threading platform I read in boot/config/plateform/macos.hpp that Boost was thread safe under Carbon but apparently there is no macro to define the usable type of thread... Any help appreciated, Bruno