AC_INIT(starttls.el)
AC_PREREQ(2.59)
AM_INIT_AUTOMAKE(starttls, 0.10)

AC_PROG_CC
AC_ISC_POSIX
AC_PROG_CPP
AC_PROG_EGREP
gl_EARLY

AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_RANLIB

AC_CHECK_LIB(socket, socket)

AC_ARG_WITH(openssl, AC_HELP_STRING([--with-openssl=PATH], [use OpenSSL from PATH]))
AC_ARG_WITH(gnutls, AC_HELP_STRING([--with-gnutls], [use GnuTLS instead of OpenSSL]),
	use_gnutls=true, use_gnutls=false)
AM_CONDITIONAL(USE_GNUTLS, test x$use_gnutls = xtrue)

if $use_gnutls; then
	AC_CHECK_HEADER(gnutls/gnutls.h, [
		AC_DEFINE(USE_GNUTLS)
		AC_CHECK_LIB(gnutls, gnutls_global_init, LIBS="-lgnutls $LIBS")],
		[GnuTLS is selected, but it is not installed])
else
	if test -n "$with_openssl"; then
		CPPFLAGS="$CPPFLAGS -I${with_openssl}/include"
		LDFLAGS="$LDFLAGS -L${with_openssl}/lib"
	fi
	AC_CHECK_HEADER(openssl/ssl.h, [
		AC_CHECK_LIB(crypto, BIO_accept, LIBS="-lcrypto $LIBS")
		AC_CHECK_LIB(ssl, SSL_CTX_new, LIBS="-lssl $LIBS")],
		AC_MSG_ERROR([OpenSSL not installed - please install first]))
fi
gl_INIT

AM_PATH_LISPDIR

AC_CONFIG_FILES(Makefile
lib/Makefile)
AC_OUTPUT