--- a/configure.in	Sun Aug 08 16:57:00 2004 +0000
+++ b/configure.in	Sun Aug 08 16:57:37 2004 +0000
@@ -108,6 +108,42 @@
 	]
 )
 
+# Check if pam is needed
+AC_ARG_WITH(pam,
+	[  --with-pam=PATH        Use pam in PATH],
+	[
+		# option is given
+		if test -d "$withval/lib"; then
+			LDFLAGS="-L${withval}/lib ${LDFLAGS}"
+		else
+			LDFLAGS="-L${withval} ${LDFLAGS}"
+		fi
+		if test -d "$withval/include"; then
+			CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
+		else
+			CPPFLAGS="-I${withval} ${CPPFLAGS}"
+		fi
+	]
+)
+
+AC_ARG_ENABLE(pam,
+	[  --disable-pam          Don't include PAM support],
+	[
+		if test "x$enableval" = "xno"; then
+			AC_DEFINE(DISABLE_PAM,, Use PAM)
+			AC_MSG_RESULT(Disabling PAM)
+		else
+			AC_CHECK_LIB(pam, pam_authenticate, , AC_MSG_ERROR([*** PAM missing - install first or check config.log ***]))
+			AC_MSG_RESULT(Enabling PAM)
+		fi
+	],
+	[
+		# if not disabled, check for pam
+		AC_CHECK_LIB(pam, pam_authenticate, , AC_MSG_ERROR([*** PAM missing - install first or check config.log ***]))
+		AC_MSG_RESULT(Enabling PAM)
+	]
+)
+
 AC_ARG_ENABLE(openpty,
 	[  --disable-openpty       Don't use openpty, use alternative method],
 	[
@@ -160,7 +196,7 @@
 # Checks for header files.
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
-AC_CHECK_HEADERS([fcntl.h limits.h netinet/in.h netinet/tcp.h stdlib.h string.h sys/socket.h sys/time.h termios.h unistd.h crypt.h pty.h ioctl.h libutil.h libgen.h inttypes.h stropts.h utmp.h utmpx.h lastlog.h paths.h util.h netdb.h sys/dirent.h])
+AC_CHECK_HEADERS([fcntl.h limits.h netinet/in.h netinet/tcp.h stdlib.h string.h sys/socket.h sys/time.h termios.h unistd.h crypt.h pty.h ioctl.h libutil.h libgen.h inttypes.h stropts.h utmp.h utmpx.h lastlog.h paths.h util.h netdb.h sys/dirent.h security/pam_appl.h pam/pam_appl.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST