-# Usage: headers_install.pl odir installdir [files...]
-# odir: dir to open files
-# install: dir to install the files
-# files: list of files to check
+# Usage: headers_install.pl readdir installdir arch [files...]
+# readdir: dir to open files
+# installdir: dir to install the files
+# arch: current architecture
+# arch is used to force a reinstallation when the arch
+# changes because kbuild then detect a command line change.
+# files: list of files to check