+ 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'.])
+