--- Makefile	2009-12-02 09:59:15.000000000 -0700
+++ Makefile.gentoo	2009-12-02 13:13:28.000000000 -0700
@@ -1,13 +1,13 @@
 EXE		= daa2iso
-CFLAGS	+= -O2 -s
-PREFIX	= /usr/local
-BINDIR	= $(PREFIX)/bin
+CFLAGS	?=
+DESTDIR	?= /usr/local
+BINDIR	= $(DESTDIR)/bin
 SRC		= $(EXE).c
 
 all:
-	$(CC) $(CFLAGS) -c LzmaDec.c
-	$(CC) $(CFLAGS) -c tinflate.c
-	$(CC) $(SRC) $(CFLAGS) -o $(EXE) LzmaDec.o tinflate.o
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c LzmaDec.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c tinflate.c
+	$(CC) $(SRC) $(CFLAGS) $(LDFLAGS) -o $(EXE) LzmaDec.o tinflate.o
 
 install:
 	install -m 755 -d $(BINDIR)