-# We except both to define `srcdir' and `target' (we *could* figure them
-# out, but we'd have to do work that they're already done to figure them out).
-# We expect Cygnus configure to define `arguments' and Autoconf to define
-# `ac_configure_args'.
+#
+# Cygnus configure incoming variables:
+# srcdir, subdir, target, arguments
+#
+# Autoconf incoming variables:
+# srcdir, target, ac_configure_args
+#
+# We *could* figure srcdir and target out, but we'd have to do work that
+# our caller has already done to figure them out and requiring these two
+# seems reasonable.