--- ./Makefile.in.~1~	2014-12-14 12:59:41.000000000 +0100
+++ ./Makefile.in	2016-11-20 00:07:51.307370977 +0100
@@ -19,24 +19,27 @@
 CC = gcc
 LD = ld
 
-CFLAGS = -O2 -Wall -I. 
+CFLAGS = @CFLAGS@
+LDFLAGS = @LDFLAGS@
 
 INSTALL = @INSTALL@
 
 exec_prefix = @prefix@
 BINDIR = @sbindir@
+SRCDIR = @srcdir@
+DESTDIR = @prefix@
 
-all: tunctl 
+all: tunctl
 
-tunctl: tunctl.c if_tun.h
-	$(CC) $(CFLAGS) tunctl.c -o tunctl
+tunctl: $(SRCDIR)/tunctl.c $(SRCDIR)/if_tun.h
+	$(CC) $(CFLAGS) $(LDFLAGS) $(SRCDIR)/tunctl.c -o tunctl
 
 install: all
-	$(INSTALL) -d $(BINDIR)
-	$(INSTALL) -m 755 -o root -g root tunctl $(BINDIR)
+	$(INSTALL) -d $(DESTDIR)$(BINDIR)
+	$(INSTALL) -m 755 tunctl $(DESTDIR)$(BINDIR)
 
 uninstall:
-	rm $(BINDIR)/tunctl
+	rm $(DESTDIR)$(BINDIR)/tunctl
 
 clean: distclean
 	rm -f tunctl *.o *~