From 5510698bbe765fc4d3fcdbc81a78d702895a05e9 Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Fri, 2 Oct 2009 13:40:29 -0700
Subject: GNUmakefile: SINCE variable may be unset

Makes it easier for new projects with no tags yet to reuse
this snippet.
---
 GNUmakefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/GNUmakefile b/GNUmakefile
index 0a1a035..44cebb0 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -153,10 +153,11 @@ NEWS: GIT-VERSION-FILE
 	mv $@+ $@
 
 SINCE = 0.91.0
+ChangeLog: log_range = $(shell test -n "$(SINCE)" && echo v$(SINCE)..)
 ChangeLog: GIT-VERSION-FILE
 	@echo "ChangeLog from $(GIT_URL) ($(SINCE)..$(GIT_VERSION))" > $@+
 	@echo >> $@+
-	git log v$(SINCE).. | sed -e 's/^/    /' >> $@+
+	git log $(log_range) | sed -e 's/^/    /' >> $@+
 	mv $@+ $@
 
 news_atom := http://unicorn.bogomips.org/NEWS.atom.xml
-- 
cgit v1.2.3-24-ge0c7