AC_INIT(ssh.c)

AC_CONFIG_HEADER(config.h)

dnl Checks for programs.
AC_PROG_CC
AC_PROG_CPP
AC_PROG_RANLIB
AC_CHECK_PROG(AR, ar, ar)
if test "$GCC" = "yes"; then CFLAGS="$CFLAGS -Wall"; fi

dnl Check for OpenSSL/SSLeay directories.
AC_MSG_CHECKING([for OpenSSL/SSLeay directory])
for ssldir in /usr /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local $prefix /usr/pkg ; do
	if test -f "$ssldir/include/openssl/crypto.h"; then
		AC_DEFINE(HAVE_OPENSSL)
		GOT_SSL="yes"
		break
	fi
	if test -f "$ssldir/include/ssl/crypto.h"; then
		AC_DEFINE(HAVE_SSL)
		GOT_SSL="yes"
		break
	fi
done
if test -z "$GOT_SSL" ; then
	AC_MSG_ERROR([Could not find SSLeay / OpenSSL libraries, please install])	
fi
AC_SUBST(ssldir)
AC_DEFINE_UNQUOTED(ssldir, "$ssldir")
if test "$ssldir" != "/usr"; then
	CFLAGS="$CFLAGS -I$ssldir/include"
	LIBS="$LIBS -L$ssldir/lib"
fi
LIBS="$LIBS -lssl -lcrypto"
AC_MSG_RESULT($ssldir)

dnl Check for RSAref library.
AC_MSG_CHECKING([for RSAref library])
saved_LIBS="$LIBS"
LIBS="$saved_LIBS -lRSAglue -lrsaref"
AC_TRY_LINK([], [],
[AC_MSG_RESULT(yes); ],
[AC_MSG_RESULT(no)]; LIBS="$saved_LIBS")

dnl Checks for libraries.
AC_CHECK_LIB(crypto, CRYPTO_lock, ,AC_MSG_ERROR([*** libcrypto missing - please install first ***]))
AC_CHECK_LIB(z, deflate, ,AC_MSG_ERROR([*** zlib missing - please install first ***]))
AC_CHECK_LIB(util, login, AC_DEFINE(HAVE_LIBUTIL_LOGIN) LIBS="$LIBS -lutil")
AC_CHECK_LIB(nsl, yp_match, , )
AC_CHECK_LIB(socket, main, , )

dnl libdl is needed by PAM on Redhat systems
AC_CHECK_LIB(dl, dlopen, , )
AC_CHECK_LIB(pam, pam_authenticate, , )

dnl Checks for header files.
AC_CHECK_HEADERS(pty.h endian.h paths.h lastlog.h)

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_CHECK_FUNCS(openpty strlcpy mkdtemp arc4random setproctitle setlogin)

dnl Check for ut_host field in utmp
AC_MSG_CHECKING([whether utmp.h has ut_host field])
AC_EGREP_HEADER(ut_host, utmp.h, 
	[AC_DEFINE(HAVE_HOST_IN_UTMP) AC_MSG_RESULT(yes); ], 
	[AC_MSG_RESULT(no)]
)

dnl Check whether user wants GNOME ssh-askpass
AC_ARG_WITH(gnome-askpass,
	[  --with-gnome-askpass    Build and use the GNOME passphrase requester],
	[GNOME_ASKPASS="gnome-ssh-askpass"])
AC_SUBST(GNOME_ASKPASS)

dnl Check for user-specified random device
AC_ARG_WITH(random,
	[  --with-random=FILE      read randomness from FILE (default /dev/urandom)],
	[
		RANDOM_POOL="$withval";
		AC_DEFINE(RANDOM_POOL, "$RANDOM_POOL")
	],
	[
		dnl Check for random device
		AC_CHECK_FILE("/dev/urandom",
			[
				RANDOM_POOL="/dev/urandom"; 
				AC_SUBST(RANDOM_POOL)
				AC_DEFINE_UNQUOTED(RANDOM_POOL, "$RANDOM_POOL")
			]
		)
	]
)

dnl Check for EGD pool file
AC_ARG_WITH(egd-pool,
	[  --with-egd-pool=FILE    read randomness from EGD pool FILE],
	[
		RANDOM_POOL="$withval";
		AC_DEFINE(HAVE_EGD)
		AC_SUBST(RANDOM_POOL)
		AC_DEFINE_UNQUOTED(RANDOM_POOL, "$RANDOM_POOL")
	]
)

if test -z "$RANDOM_POOL" -a -z "$EGD_POOL"; then
	AC_MSG_ERROR([No random device found, and no EGD random pool specified])
fi

AC_OUTPUT(Makefile)