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, http://cvs.pld-linux.org/cgi-bin/viewvc.cgi/cvs/packages/xfce4-mailwatch-plugin/gnutls-2.12.patch?view=log Was reported also to, https://bugs.gentoo.org/show_bug.cgi?id=421407 Thanks.
Fixed.