maint: automate b4_copyright updates.

[bison.git] / Makefile.am

diff --git a/Makefile.am b/Makefile.am
index 68d6d8b68c22492954c4204553cec34bedf9a52f..1bd44016638278ec2ced75f365b6498e7e98be07 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -60,3 +60,10 @@ $(top_srcdir)/.version: configure
        echo $(VERSION) > $@-t && mv $@-t $@
 dist-hook:
        echo $(VERSION) > $(distdir)/.tarball-version
+
+.PHONY: update-b4-copyright
+update-b4-copyright:
+       find data -type f                    \
+         | grep -v -E '^data/bison.m4$$'    \
+         | xargs $(build_aux)/$@
+       @echo 'warning: src/parse-gram.[hc] may need to be regenerated.'