sudo port -v selfupdate fails

[stiffstone@…]

/usr/bin/cc -dynamiclib -pipe -Os -DNDEBUG -Wall -fno-common -DUSE_INTERP_ERRORLINE -prebind -headerpad_max_install_names -Wl,-search_paths_first -Wl,-single_module -current_version 2.7.0 -compatibility_version 2.7.0 -o libthread2.7.0.dylib threadNs.o threadCmd.o threadSvCmd.o threadSpCmd.o threadPoolCmd.o psGdbm.o threadSvListCmd.o threadSvKeylistCmd.o tclXkeylist.o threadUnix.o -L/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/base/vendor/tcl8.5.15/unix -ltclstub8.5 ld: archive has no table of contents for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: * [libthread2.7.0.dylib] Error 1 make[1]: * [all-tclthread] Error 2 make: * [all] Error 1 Command failed: cd /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/base && CC=/usr/bin/cc OBJC=/usr/bin/cc ./configure --prefix=/opt/local --with-install-user=root --with-install-group=admin --with-directory-mode=0755 --enable-readline && make SELFUPDATING=1 && make install SELFUPDATING=1 Exit code: 2 Error: Error installing new MacPorts base: command execution failed To report a bug, follow the instructions in the guide:

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

Error: /opt/local/bin/port: port selfupdate failed: Error installing new MacPorts base: command execution failed