Boost.build on Darwin uses "strip" to remove symbols, but if used without any options, produced binary crashes at startup.

It affects binaries that uses boost.asio and links to boos_thread + boost_system. Adding "-S" and "-x" flags to strip solved the issue for me. Darwin tool specifies 2 flags to use with gcc. First of them is always "unrecognized", second is unrecognized with gcc4.4 and gcc4.5 (didn't check 4.3). 

Could you fix that in next release, please?