061d9531ab
This is hopefully a better alternative to LFS3_IFDEF_YES_* macros. If we need special behavior for LFS3_IFDEF_YES_*, we almost always need special behavior for LFS3_IFDEF_NO_* and LFS3_IFDEF_MAYBE_* as well. So merging all three states into a single macro saves typing and hopefully encourages correct handling of all cases. No code changes.