in practice the exponential explosion of options may become intractable. lets say you have 10 compilation flags with 10 options each. not syre you want the compiler scanning through all that on each pass
Yes - I was only talking about when a person removes some code from use, removing the code as well as the call to the code. I wasn't meaning the compiler at all (although it would be nice if the compiler could autodetect it, as you say, that could become tricky).
in practice the exponential explosion of options may become intractable. lets say you have 10 compilation flags with 10 options each. not syre you want the compiler scanning through all that on each pass