$NetBSD: patch-Makefile,v 1.2 2018/09/17 14:33:35 leot Exp $

Allow overriding PREFIX.

--- Makefile.orig	2016-11-22 00:57:34.000000000 +0000
+++ Makefile
@@ -1,6 +1,7 @@
-PREFIX=/usr/local
-BINDIR=/bin
-SBINDIR=/sbin
+PREFIX?=/usr/local
+BINDIR=bin
+SBINDIR=sbin
+MANDIR?=share/man
 
 build:
 	$(MAKE) -C src/
@@ -26,10 +27,10 @@ coverage:
 	mkdir $@
 
 install: build
-	install -d $(DESTDIR)$(PREFIX)$(BINDIR)
-	install -d $(DESTDIR)$(PREFIX)$(SBINDIR)
-	install -d $(DESTDIR)$(PREFIX)/share/man/man8
-	install -m 0755 src/unionfs $(DESTDIR)$(PREFIX)$(BINDIR)
-	install -m 0755 src/unionfsctl $(DESTDIR)$(PREFIX)$(BINDIR)
-	install -m 0755 mount.unionfs $(DESTDIR)$(PREFIX)$(SBINDIR)
-	install -m 0644 man/unionfs.8 $(DESTDIR)$(PREFIX)/share/man/man8/
+	install -d $(DESTDIR)$(PREFIX)/$(BINDIR)
+	install -d $(DESTDIR)$(PREFIX)/$(SBINDIR)
+	install -d $(DESTDIR)$(PREFIX)/$(MANDIR)/man8
+	install -m 0755 src/unionfs $(DESTDIR)$(PREFIX)/$(BINDIR)
+	install -m 0755 src/unionfsctl $(DESTDIR)$(PREFIX)/$(BINDIR)
+	install -m 0755 mount.unionfs $(DESTDIR)$(PREFIX)/$(SBINDIR)
+	install -m 0644 man/unionfs.8 $(DESTDIR)$(PREFIX)/$(MANDIR)/man8/