libc {

  GLIBC_2.0 {

    # necessary for the Hurd brk implementation

    _end;

    # variables used in macros & inline functions

    __hurd_threadvar_stack_mask; __hurd_threadvar_stack_offset;

    # functions used in libmachuser and libhurduser

    _S_catch_exception_raise;

    _S_catch_exception_raise_state;

    _S_catch_exception_raise_state_identity;

    _S_msg_add_auth; _S_msg_del_auth;

    _S_msg_describe_ports;

    _S_msg_get_dtable; _S_msg_set_dtable;

    _S_msg_get_env_variable; _S_msg_set_env_variable;

    _S_msg_get_environment; _S_msg_set_environment;

    _S_msg_get_fd; _S_msg_set_fd;

    _S_msg_get_init_int; _S_msg_set_init_int;

    _S_msg_get_init_ints; _S_msg_set_init_ints;

    _S_msg_get_init_port; _S_msg_set_init_port;

    _S_msg_get_init_ports; _S_msg_set_init_ports;

    _S_msg_proc_newids; _S_msg_report_wait;

    _S_msg_sig_post; _S_msg_sig_post_untraced;

    _hurd_intr_rpc_mach_msg;

    _hurdsig_fault_catch_exception_raise;

    _hurdsig_fault_catch_exception_raise_state;

    _hurdsig_fault_catch_exception_raise_state_identity;

    # "quasi-internal" variables

    _hurd_device_master;

    _hurd_dtable; _hurd_dtablesize; _hurd_dtable_lock;

    _hurd_host_priv;

    _hurd_msgport;

    _hurd_ports;

    # "quasi-internal" functions

    _hurd_canonicalize_directory_name_internal;

    _hurd_critical_section_lock;

    _hurd_critical_section_unlock;

    _hurd_exception2signal;

    _hurd_exec;

    _hurd_fd_get;

    _hurd_init;

    _hurd_intern_fd;

    _hurd_port_cleanup;

    _hurd_port_free;

    _hurd_port_get;

    _hurd_port_locked_get;

    _hurd_ports_use;

    _hurd_thread_sigstate;

    # functions in normal name space

    # f*

    file_name_lookup; file_name_lookup_under; file_name_path_lookup;

    file_name_split;

    fopenport;

    # g*

    get_privileged_ports;

    getauth; getcrdir; getcwdir; getcttyid; getdport; getproc; getumask;

    # h*

    hurd_catch_signal;

    hurd_check_cancel;

    hurd_file_name_lookup; hurd_file_name_lookup_retry;

    hurd_file_name_path_lookup; hurd_file_name_split;

    hurd_preempt_signals;

    hurd_safe_copyin; hurd_safe_copyout;

    hurd_safe_memmove; hurd_safe_memset;

    hurd_sig_post;

    hurd_thread_cancel; hurd_thread_self;

    hurd_unpreempt_signals;

    # o*

    openport;

    # p*

    pid2task;

    # s*

    setauth; setcrdir; setcwdir; setproc; setcttyid;

    # t*

    task2pid;

    # v*

    vpprintf;

  }

  GLIBC_2.1 {

    # "quasi-internal" functions

    _hurd_proc_init;

    # g*

    geteuids;

    # s*

    seteuids;

  }

  GLIBC_2.1.3 {

    # d*

    directory_name_split;

    # h*

    hurd_directory_name_split;

  }

  GLIBC_2.2.5 {

    # These always existed as inlines but the real functions were not exported.

    __hurd_fail;

    _hurd_self_sigstate;

    # Same for these "quasi-internal" functions

    _hurd_port_init;

    _hurd_port_set;

    # internal symbols used by other libraries (e.g. librt)

    _hurd_raise_signal;

    _hurdsig_interrupt_timeout;

    _hurdsig_fault_preemptor; _hurdsig_fault_env;

  }

  GLIBC_2.2.6 {

    # functions used in macros & inline functions

    __errno_location;

  }

  GLIBC_2.26 {

    # "quasi-internal" functions

    _hurd_exec_paths;

  }

  GLIBC_2.27 {

    # These always existed as inlines but the real functions were not exported.

    _hurd_fd_error_signal; _hurd_fd_error;

    __hurd_dfail; __hurd_sockfail;

    _hurd_port_locked_set;

    __hurd_threadvar_location_from_sp;

    __hurd_threadvar_location;

    _hurd_userlink_link; _hurd_userlink_unlink; _hurd_userlink_clear;

  }

  HURD_CTHREADS_0.3 {

    # weak refs to libthreads functions that libc calls iff libthreads in use

    __cthread_fork; __cthread_detach;

    __pthread_getattr_np; __pthread_attr_getstack;

    # variables used for detecting cthreads

    _cthread_exit_routine; _cthread_init_routine;

    # cthreads functions with stubs in libc

    __cthread_keycreate; __cthread_getspecific; __cthread_setspecific;

  }

  GLIBC_PRIVATE {

    # Used by other libs.

    __lll_abstimed_wait; __lll_abstimed_xwait;

    __lll_abstimed_lock; __lll_robust_lock;

    __lll_robust_abstimed_lock; __lll_robust_trylock;

    __lll_robust_unlock;

  }

}