-# DEBUG_FLAGS = -DDEBUGALL
-COMPILE_FLAGS = -D_linux_=1 -DHAVE_PATHS_H # -DUSE_MS_DNS=1 # -DIPX_CHANGE=1
-COPTS = -g # -O2
-VER = 0.2.8
-LIBS = -lbsd
+#
+COPTS = -O2 # -g
+VER = 2.3.3
+LIBS =
+
+ifneq ($(wildcard /usr/lib/libcrypt*),)
+LIBS += -lcrypt
+endif
+
+# Uncomment the next 2 lines to include support for Microsoft's
+# MS-CHAP authentication protocol.
+#CHAPMS=y
+#USE_CRYPT=y
+
+# The INCLUDE_DIRS must include the standard headers before the local
+# ones. If you just had -I.. then the order would be reversed. So, use
+# the default location for include files first before the .. location.
+#INCLUDE_DIRS= -I/usr/include -I..
+INCLUDE_DIRS=
+
+COMPILE_FLAGS= -D_linux_=1 -DHAVE_PATHS_H -DIPX_CHANGE
+
+CFLAGS= $(COPTS) $(COMPILE_FLAGS) $(INCLUDE_DIRS)
+
+ifdef CHAPMS
+CFLAGS += -DCHAPMS=1
+ifndef USE_CRYPT
+LIBS := -ldes $(LIBS)
+else
+CFLAGS += -DUSE_CRYPT=1
+endif
+PPPDOBJS += md4.o chap_ms.o
+ifdef MSLANMAN
+CFLAGS += -DMSLANMAN=1
+endif
+endif
+
+ifdef HAS_SHADOW
+CFLAGS += -DHAS_SHADOW
+LIBS := -lshadow $(LIBS)
+endif