llvm-3.5 +assertions Configure error- unsupported configuration

[betogil@…]

---> Cleaning clang-3.3 ---> Removing work directory for clang-3.3 ---> Computing dependencies for llvm-3.5. ---> Fetching archive for llvm-3.5 ---> llvm-3.5-3.5-r206638_0+assertions.darwin_12.x86_64.tbz2 doesn't seem to exist in /opt/local/var/macports/incoming/verified ---> Attempting to fetch llvm-3.5-3.5-r206638_0+assertions.darwin_12.x86_64.tbz2 from ​http://mse.uk.packages.macports.org/sites/packages.macports.org/llvm-3.5

% Total % Received % Xferd Average Speed Time Time Time Current

Dload Upload Total Spent Left Speed

0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0

---> Attempting to fetch llvm-3.5-3.5-r206638_0+assertions.darwin_12.x86_64.tbz2 from ​http://packages.macports.org/llvm-3.5

% Total % Received % Xferd Average Speed Time Time Time Current

Dload Upload Total Spent Left Speed

0 0 0 0 0 0 0 0 --:--:-- 0:00:01 --:--:-- 0

---> Attempting to fetch llvm-3.5-3.5-r206638_0+assertions.darwin_12.x86_64.tbz2 from ​http://nue.de.packages.macports.org/macports/packages/llvm-3.5

% Total % Received % Xferd Average Speed Time Time Time Current

Dload Upload Total Spent Left Speed

0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0

---> Fetching distfiles for llvm-3.5 Error: llvm-3.5 requires a C++11 runtime, which your configuration does not allow Error: org.macports.fetch for port llvm-3.5 returned: unsupported configuration Warning: targets not executed for llvm-3.5: org.macports.install org.macports.fetch org.macports.checksum org.macports.extract org.macports.patch org.macports.configure org.macports.build org.macports.destroot Please see the log file for port llvm-3.5 for details:

/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.5/llvm-3.5/main.log

Error: Unable to upgrade port: 1 To report a bug, follow the instructions in the guide:

​http://guide.macports.org/#project.tickets