for me - i reinstalled macport enviroment yesterday after cleaning up to much stuff 
sudo port -f deactivate autoconf-archive
helped gnutls to build.
after that use
sudo port -f activate autoconf-archive to revert the setting
for me - i reinstalled macport enviroment yesterday after cleaning up to much stuff 
sudo port -f deactivate autoconf-archive
helped gnutls to build.
after that use
sudo port -f activate autoconf-archive to revert the setting