[boost] [Build] Specify compiler on the command line

Hi, Still attempting to setup Boost.Build for Hana, I find myself unable to specify the compiler to be used by `b2` on the command line. The system compiler is then used by default, which does not work because I need to test on recent compilers. This can be handled by writing a project-config.jam file with the following in it: import feature ; if ! clang in [ feature.values <toolset> ] { using clang : : /path/to/clang ; } However, this is not very script-friendly, and I wonder whether there's a way to specify it on the command-line instead. Regards, Louis