From a2fe8c155a625b8242bd36870bc1e0c88b5f37bd Mon Sep 17 00:00:00 2001
From: Oswald Buddenhagen <ossi@users.sf.net>
Date: Fri, 28 Feb 2020 12:10:07 +0100
Subject: [PATCH] re-generate ChangeLog only if it's newer than the git index

otherwise, we'd re-generate it during 'install' as well.

note that this does not work with new-style git worktrees, where .git is
only a file - but there the log generation itself already doesn't work
anyway.
---
 Makefile.am | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index 557742f..245299b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -47,7 +47,10 @@ LOG_PL = \
         print $$log."\n"; \
     }
 
-$(srcdir)/ChangeLog: log
+$(srcdir)/.git/index:
+$(srcdir)/ChangeLog: $(srcdir)/.git/index
+	$(MAKE) log
+
 log:
 	@test -z "$(srcdir)" || cd $(srcdir) && \
 	 ( ! test -d .git || \