[Ifeffit] HELP: failed to install gcc49 on mac (v10.6.8)

Hello, I'm trying to install MacPorts package on my mac (v.10.6.8), and I can't do this. Below are error messages that I got. Could you please help me to figure out what the problem is? Thank you. Ie-Rang ----------------------------------- ---> Building gcc49 Error: org.macports.build for port gcc49 returned: command execution failed Error: Failed to install gcc49 Please see the log file for port gcc49 for details: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc49/gcc49/main.log Error: The following dependencies were not installed: . . . Error: Processing of port demeter-devel failed