From 88e7c7a466f96afd83f8d6808ed0aafae2961c74 Mon Sep 17 00:00:00 2001
From: Ruslan Ermilov <ru@FreeBSD.org>
Date: Sun, 27 Feb 2005 11:51:46 +0000
Subject: [PATCH] Make it clear we no longer support source upgrades from
 versions prior to 5.3.

---
 Makefile.inc1 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Makefile.inc1 b/Makefile.inc1
index 2f58ac495411..b6fbfb2dedfb 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -738,6 +738,10 @@ update:
 # legacy: Build compatibility shims for the next three targets
 #
 legacy:
+.if ${BOOTSTRAPPING} < 503000
+	@echo "ERROR: Source upgrades from versions prior to 5.3 not supported."; \
+	false
+.endif
 .for _tool in tools/build
 	${_+_}@${ECHODIR} "===> ${_tool} (obj,includes,depend,all,install)"; \
 	    cd ${.CURDIR}/${_tool}; \