auto-test check.t:mkshrc-1 as well (verified to work)

Makefile

@@ -1,4 +1,4 @@
-# $MirOS: src/bin/mksh/Makefile,v 1.8 2005/10/21 11:44:25 tg Exp $
+# $MirOS: src/bin/mksh/Makefile,v 1.9 2006/05/08 12:18:49 tg Exp $
 
 PROG=		mksh
 SRCS=		alloc.c edit.c eval.c exec.c expr.c funcs.c histrap.c \
@@ -9,7 +9,14 @@ check:
 	@cd ${.CURDIR} && ${MAKE} regress V=-v
 
 regress: ${PROG} check.pl check.t
-	perl ${.CURDIR}/check.pl -s ${.CURDIR}/check.t ${V} \
-	    -p ./${PROG} -C pdksh
+	mkdir -p regress-dir
+	echo export FNORD=666 >regress-dir/.mkshrc
+	HOME=$$(readlink -nf regress-dir) perl ${.CURDIR}/check.pl \
+	    -s ${.CURDIR}/check.t ${V} -p ./${PROG} -C pdksh
+
+cleandir: clean-regress
+
+clean-regress:
+	-rm -rf regress-dir
 
 .include <bsd.prog.mk>