--- Makefile.orig	2015-12-12 13:51:41 UTC
+++ Makefile
@@ -1,18 +1,23 @@
-CC = cc
-CFLAGS = -g -O2 -Wall -pedantic
+CC? = cc
+CFLAGS? = -g -O2 -Wall -pedantic
 # CFLAGS = -O3
 SHAR = shar 
 # SHAR = shar -T
 PERL = perl
 RM = rm -rf
 VERSION = 2.1.4
-MKDIR = mkdir
-prefix = /usr/local
+MKDIR? = mkdir
+prefix = $(DESTDIR)$(PREFIX)
+manprefix = $(DESTDIR)$(MANPREFIX)
 PYTHON2 = python
 PYTHON3 = python
+BSD_INSTALL_PROGRAM?=	${INSTALL} -s -o root -g wheel -m 555
+BSD_INSTALL_MAN?=	${INSTALL}    -o root -g wheel -m 444
 
 .PHONY: clean install test tar shar
 
+all: nkf
+
 nkf : nkf.o utf8tbl.o
 	$(CC) $(CFLAGS) $(LDFLAGS) -o nkf nkf.o utf8tbl.o
 
@@ -47,17 +52,17 @@ install: install-main install-man instal
 
 install-main:
 	-$(MKDIR) $(prefix)/bin
-	cp -f nkf $(prefix)/bin/
+	${BSD_INSTALL_PROGRAM} nkf $(prefix)/bin/
 
 install-man:
-	-$(MKDIR) $(prefix)/man
-	-$(MKDIR) $(prefix)/man/man1
-	cp -f nkf.1 $(prefix)/man/man1/
+	-$(MKDIR) $(manprefix)/man
+	-$(MKDIR) $(manprefix)/man/man1
+	${BSD_INSTALL_MAN} nkf.1 $(manprefix)/man/man1/
 
 install-man-ja:
-	-$(MKDIR) $(prefix)/man/ja
-	-$(MKDIR) $(prefix)/man/ja/man1
-	cp -f nkf.1j $(prefix)/man/ja/man1/nkf.1
+	-$(MKDIR) $(manprefix)/man/ja
+	-$(MKDIR) $(manprefix)/man/ja/man1
+	${BSD_INSTALL_MAN} nkf.1j $(manprefix)/man/ja/man1/nkf.1
 
 shar:
 	-mkdir nkf-$(VERSION)