> Error: Target org.macports.build returned: shell command failed > Log for m4 is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_m4/main.log > Error: Unable to upgrade port: 1 Any sign of what might have happened in this log file? Otherwise use option -d for the port command to get more insight.