$NetBSD: patch-Makefile.am,v 1.1 2020/03/12 10:11:34 ryoon Exp $

--- Makefile.am.orig	2018-06-04 07:57:02.784445952 +0000
+++ Makefile.am
@@ -206,7 +206,7 @@ BUILT_SOURCES = .version
 CHANGELOG_FILE = v$(VERSION)-ChangeLog
 
 $(CHANGELOG_FILE):
-	@ if test "x$$PREVIOUS_VERSION" == "x"; then \
+	@ if test "x$$PREVIOUS_VERSION" = "x"; then \
 		echo "Usage make changelog PREVIOUS_VERSION=<version>"; \
 		exit 1; \
 	fi