-# The following lines list filename patterns matching canonical configurations,
-# and the associated versions to use for various libraries. The entire
-# list is processed, with earlier entries taking precedence over later
-# entries. So loose patterns at the end of the list can give defaults.
+# The following lines list the associated versions to use for various
+# libraries. The entire list is processed, with earlier entries
+# taking precedence over later entries (and the files from sysdeps
+# directories coming before those from other subdirectories, which
+# come before this file).