maint: fix use of copyright year intervals.

[bison.git] / cfg.mk

diff --git a/cfg.mk b/cfg.mk
index 66a2bc6fc059176053089617f1df1e8db4b8039f..501e8dce2ca46a658adbffecc8bee199495ffa6f 100644 (file)
--- a/cfg.mk
+++ b/cfg.mk
@@ -44,3 +44,5 @@ gnulib_dir = $(srcdir)/../../gnulib
 bootstrap-tools = autoconf,automake,flex,gnulib
 
 update-copyright-local = update-b4-copyright
+update-copyright-env = \
+  UPDATE_COPYRIGHT_FORCE=1 UPDATE_COPYRIGHT_USE_INTERVALS=1