Make this work on Solaris "out of the box"

usr.sbin/pkg_install/Makefile.inc

@@ -1,9 +1,21 @@
-# $NetBSD: Makefile.inc,v 1.6 1999/08/19 14:37:36 agc Exp $
+# $NetBSD: Makefile.inc,v 1.7 1999/08/20 09:12:10 agc Exp $
 # Original from Freebsd, no rcs id.
 
 LIBINSTALL != cd ${.CURDIR}/../lib;\
     printf "xxx: .MAKE\n\t@echo \$${.OBJDIR}\n" | ${MAKE} -s -f-
 CPPFLAGS+=-I${.CURDIR}/../lib ${DEBUG} -DBINDIR='"${BINDIR}"'
+
+.if ${OS} == "SunOS.5"
+.if exists(/etc/mk.conf)
+.include "/etc/mk.conf"
+.endif
+LOCALBASE?= /usr/local
+TAR_CMD?= gtar
+TAR_FULLPATHNAME?= ${LOCALBASE}/bin/${TAR_CMD}
+CPPFLAGS+=-DTAR_CMD='"${TAR_CMD}"' -DTAR_FULLPATHNAME='"${TAR_FULLPATHNAME}"'
+BINDIR=${LOCALBASE}/bsd/bin
+.endif
+
 DPADD+=	${LIBINSTALL}/libinstall.a
 LDADD+=	-L${LIBINSTALL} -linstall