3.14 Options for Directory Search -Bprefix As a special kludge, if the path provided by ‘-B’ is ‘[dir/]stageN /’, where N is a number in the range 0 to 9, then it will be replaced by ‘[dir/]include’. This is to help with boot-strapping the compiler. ---------------------------------- What does it mean, "boot-strapping the compiler"? I do not understand.