From a48089f705b6314cb3af659b7ba1cef284c37ecc Mon Sep 17 00:00:00 2001
From: sheldonh <sheldonh@FreeBSD.org>
Date: Wed, 16 Aug 2000 14:58:42 +0000
Subject: [PATCH] Do not allow the cleandir target to blow away the entire
 source directory when MAKEOBJDIRPREFIX is defined but empty.

Reported by:	Vernon Schryver <vjs@calcite.rhyolite.com>
---
 share/mk/bsd.obj.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/share/mk/bsd.obj.mk b/share/mk/bsd.obj.mk
index b648222d8979..71f46605d37c 100644
--- a/share/mk/bsd.obj.mk
+++ b/share/mk/bsd.obj.mk
@@ -43,7 +43,7 @@
 #		create build directory.
 #
 
-.if defined(MAKEOBJDIRPREFIX)
+.if defined(MAKEOBJDIRPREFIX) && !empty(MAKEOBJDIRPREFIX)
 CANONICALOBJDIR:=${MAKEOBJDIRPREFIX}${.CURDIR}
 .else
 CANONICALOBJDIR:=/usr/obj${.CURDIR}