if ($0 == "MSVC"        && "'$os'" != "MSVC")              { next; }

			if ($0 == "DIRECTMUSIC" && "'$enable_directmusic'" != "1") { next; }

			if ($0 == "FLUIDSYNTH"  && "'$enable_fluidsynth'" != "1")  { next; }

			if ($0 == "HAVE_THREAD" && "'$with_threads'" == "0")       { next; }

			skip += 1;