ObjFW  Diff

		])
		;;
	esac

	AC_ARG_WITH(tls,
		AS_HELP_STRING([--with-tls], [
			enable TLS support using the specified library
			(yes, openssl, gnutls, securetransport, mbedtls or
			no)]))
	AS_IF([test x"$with_tls" = x""], [with_tls="yes"])
	tls_support="no"

	AS_IF([test x"$with_tls" = x"securetransport" \
	    -o x"$with_tls" = x"yes"], [
		AC_CHECK_HEADERS(Security/SecureTransport.h, [
			old_LIBS="$LIBS"

			AC_SUBST(OF_GNUTLS_TLS_STREAM_M, "OFGnuTLSTLSStream.m")
		], [
			dnl Disable default action-if-not-found, which exits
			dnl configure with an error.
			:
		])
	])

	AS_IF([test x"$with_tls" = x"mbedtls"], [
		AC_ARG_WITH(mbedtls-ca-path,
			AS_HELP_STRING([path to CA file for Mbed TLS]))

		AS_IF([test x"$with_mbedtls_ca_path" = x""], [
			AC_MSG_ERROR([--mbedtls-ca-path needs to be specified!])
		])
		AC_DEFINE_UNQUOTED(OF_MBEDTLS_CA_PATH, "$with_mbedtls_ca_path",
			[Path to CA file for Mbed TLS])

		AC_CHECK_LIB(mbedtls, mbedtls_net_init, [
			AC_CHECK_HEADER(mbedtls/ssl.h, [
				tls_support="Mbed TLS"
				TLS_LIBS="-lmbedx509 -lmbedcrypto $TLS_LIBS"
				TLS_LIBS="-lmbedtls $TLS_LIBS"

				AC_SUBST(OF_MBEDTLS_TLS_STREAM_M,
					"OFMbedTLSTLSStream.m")
			])
		], [], [-lmbedx509 -lmbedcrypto])
	])

	AS_IF([test x"$tls_support" != x"no"], [
		AC_SUBST(TLS, "tls")
		AC_SUBST(TLS_CPPFLAGS)
		AC_SUBST(TLS_LIBS)
		AC_DEFINE(HAVE_TLS_SUPPORT, 1,
			[Whether we have an implementation for TLS])