+# See comments in build-aux/git-version-gen. However, we make .version depend
+# on configure so that .version and VERSION/PACKAGE_VERSION stay in sync in the
+# working copy (for example, when you run autoreconf && make). Allowing these
+# to fall out of sync appears to have little potential to improve Bison build
+# efficiency (even if we were to replace VERSION/PACKAGE_VERSION with .version
+# everywhere possible). On the other hand, it could be harmful. For example,
+# a developer might naively reference .version in a test case while the bison
+# executable still compiles with VERSION, and so the test case might fail or
+# pass incorrectly.
+BUILT_SOURCES = $(top_srcdir)/.version
+$(top_srcdir)/.version: configure
+ $(AM_V_GEN)echo $(VERSION) > $@-t && mv $@-t $@
+dist-hook: gen-ChangeLog
+ $(AM_V_GEN)echo $(VERSION) > $(distdir)/.tarball-version
+
+.PHONY: update-b4-copyright update-package-copyright-year
+update-b4-copyright:
+ $(AM_V_GEN) find data -type f \
+ | grep -v -E '^data/bison.m4$$' \
+ | xargs $(build_aux)/$@
+ @echo 'warning: src/parse-gram.[hc] may need to be regenerated.'
+update-package-copyright-year:
+ $(AM_V_GEN)$(build_aux)/$@ configure.ac
+
+gen_start_date = 2012-01-16
+.PHONY: gen-ChangeLog
+gen-ChangeLog:
+ $(AM_V_GEN)if test -d $(srcdir)/.git; then \
+ $(top_srcdir)/build-aux/gitlog-to-changelog \
+ --strip-tab \
+ --strip-cherry-picked \
+ --no-cluster \
+ --amend=$(srcdir)/build-aux/git-log-fix \
+ --since=$(gen_start_date) > $(distdir)/cl-t; \
+ rm -f $(distdir)/ChangeLog; \
+ mv $(distdir)/cl-t $(distdir)/ChangeLog; \
+ fi