POSIX: complain if %prec's token was not defined.

[bison.git] / Makefile.am

diff --git a/Makefile.am b/Makefile.am
index adf71e5441c7c48f88b32b63ec68c076f6335994..036efac7ec1a9d2429fa20c039bd3a973d3f48fa 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -57,3 +57,10 @@ $(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.'