hacking: copyright notices must be updated before releasing

* HACKING (Release procedure): Suggest to use "make update-copyright".

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --git a/HACKING b/HACKING
index e3153cc..7ab4e7f 100644 (file)
--- a/HACKING
+++ b/HACKING
@@ -223,6 +223,10 @@
   running "make fetch".  In case any file in the automake repository
   has been updated, commit and re-run the testsuite.
 
+* Ensure that the copyright notices of the distributed files is up to
+  date.  The maintainer-only target "update-copyright" can help with
+  this.
+
 * Update NEWS.
 
 * Update the version number in configure.ac.