+CFLAGS += -DINET6
+OBJS += ipv6cp.o eui64.o
+
+# Uncomment to enable MS-CHAP
+CFLAGS += -DUSE_CRYPT -DCHAPMS -DMSLANMAN -DHAVE_CRYPT_H
+OBJS += chap_ms.o pppcrypt.o md4.o sha1.o
+
+# Uncomment for CBCP
+#CFLAGS += -DCBCP_SUPPORT
+#OBJS += cbcp.o
+
+# Uncomment for PAM
+#CFLAGS += -DUSE_PAM
+#LIBS += -lpam