LyX: error: implicit instantiation of undefined template

[alfredherrmann@…]

:info:configure config.status: creating sourcedoc/Doxyfile
:info:configure config.status: creating sourcedoc/Makefile
:info:configure config.status: creating src/client/Makefile
:info:configure config.status: creating src/client/lyxclient.1
...skipping...
:info:build ./Lexer.h:225:13: error: implicit instantiation of undefined template 'std::basic_string<char, std::char_traits<char>, std::allocator<char> >'
:info:build                 t = T(lex.getString());
:info:build                           ^
:info:build ./support/strfwd.h:42:64: note: template is declared here
:info:build template<typename Char, typename Traits, typename Alloc> class basic_string;
:info:build                                                                ^
:info:build   CXX    LyX.o
:info:build 1 error generated.
:info:build make[4]: *** [Lexer.o] Error 1
:info:build make[4]: *** Waiting for unfinished jobs....
:info:build 2 warnings generated.
:info:build 2 warnings generated.
:info:build make[4]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_LyX/lyx/work/lyx-2.0.1/src'
:info:build make[3]: *** [all-recursive] Error 1
:info:build make[3]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_LyX/lyx/work/lyx-2.0.1/src'
:info:build make[2]: *** [all] Error 2
:info:build make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_LyX/lyx/work/lyx-2.0.1/src'
:info:build make[1]: *** [all-recursive] Error 1
:info:build make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_LyX/lyx/work/lyx-2.0.1'
:info:build make: *** [all] Error 2
:info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_LyX/lyx/work/lyx-2.0.1'
:info:build shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_LyX/lyx/work/lyx-2.0.1" && /usr/bin/make -j4 -w all " returned error 2
:error:build Target org.macports.build returned: shell command failed (see log for details)
:debug:build Backtrace: shell command failed (see log for details)
    while executing
"command_exec build"
    (procedure "portbuild::build_main" line 8)
    invoked from within
"$procedure $targetname"
:info:build Warning: the following items did not execute (for lyx): org.macports.activate org.macports.build org.macports.destroot org.macports.install
:notice:build Log for lyx is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_aqua_LyX/lyx/main.log