-# The Build Target ARCH is determined by a logical AND of:\r
-# platform BuildOptions: <SupportedArchitectures> tag\r
+# The Build Target ARCH is determined by (precedence high to low):\r
+# Command-line: -a ARCH option\r
+# target.txt: TARGET_ARCH values\r
+# DSC file: [Defines] SUPPORTED_ARCHITECTURES tag\r