Created attachment 3882
fix build with gnutls >= 3.0.3
xfce4-mailwatch-plugin fails to build with gnutls >= 3.0.3 because gnutls_transport_set_lowat() has been removed. A lowat level of 0 has been the default since gnutls 2.11.1, so the gnutls_transport_set_lowat() call can be sfely removed for gnutls >= 2.12. Attached patch fixes the issue.
Looks almost like this alternative patch,
Was reported also to,