$NetBSD: patch-Makefile,v 1.2 2017/08/19 00:21:25 jlam Exp $

Allow overriding PREFIX
DESTDIR support
PKGMANDIR support

--- Makefile.orig	2016-06-04 03:25:08.000000000 +0000
+++ Makefile
@@ -2,7 +2,7 @@ CC = gcc
 
 #OPTS = -g -Wall -Wextra
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
 MAN_PREFIX = $(PREFIX)
 
 COMPVERSION = 6.33
@@ -15,7 +15,7 @@ distdir = $(DISTNAME)
 LIBDIR = $(PREFIX)/share/$(BINNAME)/lib
 INCLUDEDIR = $(PREFIX)/share/$(BINNAME)/include
 MANPAGE = $(NAME).1
-MANDIR = $(MAN_PREFIX)/man/man1
+MANDIR = $(MAN_PREFIX)/$(PKGMANDIR)/man1
 
 DEFINES=  -DInclude_Directory=\"$(INCLUDEDIR),$(LIBDIR)\" -DTemporary_Directory=\"/tmp\"
 
@@ -63,18 +63,18 @@ strip: $(BINNAME)
 	strip $(BINNAME)
 
 install: $(BINNAME) lib
-	install -d -m 755 $(BINDIR)
-	install -c -m 755 $(BINNAME) $(BINDIR)
-	install -d -m 755 $(LIBDIR)
-	install -c -m 644 $(wildcard lib/*) $(LIBDIR)
-	install -d -m 755 $(INCLUDEDIR)
-	install -c -m 644 $(wildcard include/*) $(INCLUDEDIR)
-	install -d -m 755 $(MANDIR)
-	install -c -m 644 $(MANPAGE) $(MANDIR)
-	install -d -m 755 $(DEMODIR)
-	install -c -m 644 $(wildcard demos/*) $(DEMODIR)
-	install -d -m 755 $(TUTORDIR)
-	install -c -m 644 $(wildcard tutor/*) $(TUTORDIR)
+	install -d -m 755 $(DESTDIR)$(BINDIR)
+	install -c -m 755 $(BINNAME) $(DESTDIR)$(BINDIR)
+	install -d -m 755 $(DESTDIR)$(LIBDIR)
+	install -c -m 644 $(wildcard lib/*) $(DESTDIR)$(LIBDIR)
+	install -d -m 755 $(DESTDIR)$(INCLUDEDIR)
+	install -c -m 644 $(wildcard include/*) $(DESTDIR)$(INCLUDEDIR)
+	install -d -m 755 $(DESTDIR)$(MANDIR)
+	install -c -m 644 $(MANPAGE) $(DESTDIR)$(MANDIR)
+	install -d -m 755 $(DESTDIR)$(DEMODIR)
+	install -c -m 644 $(wildcard demos/*) $(DESTDIR)$(DEMODIR)
+	install -d -m 755 $(DESTDIR)$(TUTORDIR)
+	install -c -m 644 $(wildcard tutor/*) $(DESTDIR)$(TUTORDIR)
 
 install-strip: strip install