archivefetch failed for libcxx @3.7.1_0

[renskevdveen@…]

I am trying to install a program that uses MacPorts, but it failed to install one of the archives (libcxx). See below and attached log file. I am running El Capitan OS 10.11.3.

Input: sudo port install xorg-server demeter

Partial output:

--->  Attempting to fetch libcxx-3.7.1_0.darwin_15.x86_64.tbz2 from http://jog.id.packages.macports.org/macports/packages/libcxx
Error: org.macports.archivefetch for port libcxx returned: archivefetch failed for libcxx @3.7.1_0
Error: Failed to install libcxx
Please see the log file for port libcxx for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_libcxx/libcxx/main.log
Error: The following dependencies were not installed: ifeffit...
...
Error: Processing of port demeter failed

[renskevdveen@…]

Cc Me!

[mf2k (Frank Schima)]

The Priority field is for use by Macports team members only.

[mf2k (Frank Schima)]

In the future, please use WikiFormatting, fill in the Port field and Cc the port maintainers (port info --maintainers libcxx), if any. As reporter, you do not need to Cc yourself.

[ryandesign (Ryan Carsten Schmidt)]

According to your log, the problem is MacPorts cannot resolve any hosts:

:debug:archivefetch Fetching archive failed:: Could not resolve host: packages.macports.org

Duplicate of #50986. Instead of beginning by installing demeter, which tries to install all its hundreds of dependencies in one go, install some of the dependencies of demeter first separately. (You can see a list of them by running port deps demeter)