+#
+COPTS = -O2 -pipe -Wall -g
+LIBS =
+
+# Uncomment the next 2 lines to include support for Microsoft's
+# MS-CHAP authentication protocol. Also, edit plugins/radius/Makefile.linux.
+CHAPMS=y
+USE_CRYPT=y
+# Don't use MSLANMAN unless you really know what you're doing.
+#MSLANMAN=y
+# Uncomment the next line to include support for MPPE. CHAPMS (above) must
+# also be enabled. Also, edit plugins/radius/Makefile.linux.
+MPPE=y
+
+# Uncomment the next line to include support for PPP packet filtering.
+# This requires that the libpcap library and headers be installed
+# and that the kernel driver support PPP packet filtering.
+FILTER=y
+
+# Uncomment the next line to enable multilink PPP (enabled by default)
+# Linux distributions: Please leave multilink ENABLED in your builds
+# of pppd!
+HAVE_MULTILINK=y
+
+# Uncomment the next line to enable the TDB database (enabled by default.)
+# If you enable multilink, then TDB is automatically enabled also.
+# Linux distributions: Please leave TDB ENABLED in your builds.
+USE_TDB=y
+
+HAS_SHADOW=y
+#USE_PAM=y
+#HAVE_INET6=y
+
+# Enable plugins
+PLUGIN=y
+
+# Enable Microsoft proprietary Callback Control Protocol
+#CBCP=y
+
+# Enable EAP SRP-SHA1 authentication (requires libsrp)
+#USE_SRP=y
+
+MAXOCTETS=y
+
+INCLUDE_DIRS= -I../include
+
+COMPILE_FLAGS= -DHAVE_PATHS_H -DIPX_CHANGE -DHAVE_MMAP
+
+CFLAGS= $(COPTS) $(COMPILE_FLAGS) $(INCLUDE_DIRS) '-DDESTDIR="@DESTDIR@"'
+
+ifdef CHAPMS
+CFLAGS += -DCHAPMS=1
+NEEDDES=y
+PPPDOBJS += md4.o chap_ms.o
+HEADERS += md4.h chap_ms.h
+ifdef MSLANMAN
+CFLAGS += -DMSLANMAN=1
+endif
+ifdef MPPE
+CFLAGS += -DMPPE=1
+endif
+endif
+
+# EAP SRP-SHA1
+ifdef USE_SRP
+CFLAGS += -DUSE_SRP -DOPENSSL -I/usr/local/ssl/include
+LIBS += -lsrp -L/usr/local/ssl/lib -lcrypto
+TARGETS += srp-entry
+EXTRAINSTALL = $(INSTALL) -s -c -m 555 srp-entry $(BINDIR)/srp-entry
+MANPAGES += srp-entry.8
+EXTRACLEAN += srp-entry.o
+NEEDDES=y
+else
+# OpenSSL has an integrated version of SHA-1, and its implementation
+# is incompatible with this local SHA-1 implementation. We must use
+# one or the other, not both.
+PPPDSRCS += sha1.c
+HEADERS += sha1.h
+PPPDOBJS += sha1.o
+endif
+
+ifdef HAS_SHADOW
+CFLAGS += -DHAS_SHADOW
+#LIBS += -lshadow $(LIBS)
+endif
+
+ifneq ($(wildcard /usr/include/crypt.h),)
+CFLAGS += -DHAVE_CRYPT_H=1
+LIBS += -lcrypt
+endif
+
+ifdef NEEDDES
+ifndef USE_CRYPT
+LIBS += -ldes $(LIBS)
+else
+CFLAGS += -DUSE_CRYPT=1
+endif
+PPPDOBJS += pppcrypt.o
+HEADERS += pppcrypt.h
+endif
+
+# For "Pluggable Authentication Modules", see ftp.redhat.com:/pub/pam/.
+ifdef USE_PAM
+CFLAGS += -DUSE_PAM
+LIBS += -lpam -ldl
+endif
+
+# Multi-linnk
+ifdef HAVE_MULTILINK
+ # Multilink implies the use of TDB
+ USE_TDB=y
+
+ CFLAGS += -DHAVE_MULTILINK
+ PPPDSRCS += multilink.c
+ PPPDOBJS += multilink.o
+endif
+
+# TDB
+ifdef USE_TDB
+ CFLAGS += -DUSE_TDB=1
+ PPPDSRCS += tdb.c spinlock.c
+ PPPDOBJS += tdb.o spinlock.o
+ HEADERS += tdb.h spinlock.h
+endif
+
+# Lock library binary for Linux is included in 'linux' subdirectory.
+ifdef LOCKLIB
+LIBS += -llock
+CFLAGS += -DLOCKLIB=1
+endif
+
+ifdef PLUGIN
+CFLAGS += -DPLUGIN
+LDFLAGS += -Wl,-E
+LIBS += -ldl
+endif
+
+ifdef FILTER
+ifneq ($(wildcard /usr/include/pcap-bpf.h),)
+LIBS += -lpcap
+CFLAGS += -DPPP_FILTER
+endif
+endif