-$! "" Compile with default (/NOPOINTER_SIZE)
-$! 32 Compile with /POINTER_SIZE=32 (SHORT)
-$! 64 Compile with /POINTER_SIZE=64[=ARGV] (LONG[=ARGV])
+$! "" Compile with default (/NOPOINTER_SIZE).
+$! 32 Compile with /POINTER_SIZE=32 (SHORT).
+$! 64 Compile with /POINTER_SIZE=64[=ARGV] (LONG[=ARGV]).
+$! (Automatically select ARGV if compiler supports it.)
+$! 64= Compile with /POINTER_SIZE=64 (LONG).
+$! 64=ARGV Compile with /POINTER_SIZE=64=ARGV (LONG=ARGV).