[boost] passing compiler options

Hi after running bootstrap.sh, if I want to pass my compiler (in this case cygwin), is it correct to modify project-config.jam and replace if ! gcc in [ feature.values <toolset> ] { using gcc ; } with using gcc : : : <compileflags>-DBOOST_WINDOWS_API <compileflags>-mno-cygwin <linkflags>-mno-cygwin ; this way, am I sure that these compiler options will be passed to the compiler? thanks in advance Lorenzo