+ dnl Determine the appropriate default list of substitute URLs.
+ GUILE_MODULE_AVAILABLE([have_gnutls], [(gnutls)])
+ if test "x$have_gnutls" = "xyes"; then
+ guix_substitute_urls="https://mirror.hydra.gnu.org"
+ else
+ AC_MSG_WARN([GnuTLS is missing, substitutes will be downloaded in the clear])
+ guix_substitute_urls="http://mirror.hydra.gnu.org"
+ fi
+ AC_MSG_CHECKING([for default substitute URLs])
+ AC_MSG_RESULT([$guix_substitute_urls])
+
+ AC_DEFINE_UNQUOTED([GUIX_SUBSTITUTE_URLS], ["$guix_substitute_urls"],
+ [Default list of substitute URLs used by 'guix-daemon'.])
+
+ dnl Check whether the 'offload' build hook can be built (uses
+ dnl 'restore-file-set', which requires unbuffered custom binary input
+ dnl ports from Guile >= 2.0.10.)
+ GUIX_CHECK_UNBUFFERED_CBIP
+
+ dnl Check for Guile-SSH, which is required by 'guix offload'.
+ GUIX_CHECK_GUILE_SSH
+
+ case "x$ac_cv_guix_cbips_support_setvbuf$guix_cv_have_recent_guile_ssh" in
+ xyesyes)
+ guix_build_daemon_offload="yes"
+ AC_DEFINE([HAVE_DAEMON_OFFLOAD_HOOK], [1],
+ [Define if the daemon's 'offload' build hook is being built (requires Guile-SSH).])
+ ;;
+ *)
+ guix_build_daemon_offload="no"
+ ;;
+ esac
+