clustalx @2.1: error: implicit instantiation of undefined template 'std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >'

[pst@…]

I have a fresh install of macports. I did "sudo port install clustalx", got:

Error: org.macports.build for port clustalx returned: command execution failed
Please see the log file for port clustalx for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_clustalx/clustalx/main.log
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port clustalx failed

Log attached.

[pst@…]

Build error log for clustalx

[ryandesign (Ryan Carsten Schmidt)]

The first error in the log seems to be:

:info:build In file included from clustalW/general/VectorOutOfRange.cpp:9:
:info:build clustalW/general/VectorOutOfRange.h:23:21: error: implicit instantiation of undefined template 'std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >'
:info:build         std::string _name;
:info:build                     ^
:info:build /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/iosfwd:188:33: note: template is declared here
:info:build     class _LIBCPP_TYPE_VIS_ONLY basic_string;
:info:build                                 ^