| libc { | 
 |   GLIBC_2.0 { | 
 |     # variables used in Mach-specific macros | 
 |     __mach_task_self_; | 
 |     __vm_page_size; | 
 |  | 
 |     # functions used in inline functions and macros | 
 |     __mach_port_deallocate; __mach_thread_self; | 
 |  | 
 |     # functions used by RPC stubs | 
 |     __mach_msg; __mach_msg_overwrite; | 
 |     __mig_allocate; __mig_deallocate; __mig_dealloc_reply_port; | 
 |     __mig_get_reply_port; __mig_put_reply_port; | 
 |     __mig_strncpy; | 
 |  | 
 |     # variables in normal name space | 
 |     vm_page_size; | 
 |  | 
 |     # functions in normal name space | 
 |  | 
 |     # e* | 
 |     evc_wait; | 
 |  | 
 |     # m* | 
 |     mach_error; mach_error_string; mach_error_type; | 
 |     mach_host_self; | 
 |     mach_msg; mach_msg_overwrite; | 
 |     mach_msg_destroy; | 
 |     mach_msg_send; mach_msg_receive; | 
 |     mach_msg_server; mach_msg_server_timeout; | 
 |     mach_open_devstream; | 
 |     mach_port_allocate; mach_port_allocate_name; mach_port_deallocate; | 
 |     mach_port_insert_right; mach_reply_port; | 
 |     mach_setup_thread; | 
 |     mach_task_self; | 
 |     mach_thread_self; | 
 |     mig_allocate; mig_dealloc_reply_port; mig_deallocate; | 
 |     mig_get_reply_port; mig_init; mig_put_reply_port; | 
 |  | 
 |     # v* | 
 |     vm_allocate; vm_deallocate; vm_map; | 
 |  | 
 |     # s* | 
 |     swtch; swtch_pri; | 
 |  | 
 |     # t* | 
 |     task_create; task_set_special_port; task_suspend; task_terminate; | 
 |     thread_depress_abort; thread_switch; | 
 |   } | 
 |   GLIBC_2.2.5 { | 
 |     # internal functions used by other libraries (e.g. librt) | 
 |     __mach_msg_destroy; __mach_reply_port; | 
 |  | 
 |     # This was always there, but not exported as it should have been. | 
 |     mig_strncpy; | 
 |   } | 
 |   GLIBC_2.23 { | 
 |     __mach_host_self_; | 
 |   } | 
 |  | 
 |   HURD_CTHREADS_0.3 { | 
 |     __mutex_init; __mutex_lock; __mutex_lock_solid; __mutex_trylock; | 
 |     __mutex_unlock; __mutex_unlock_solid; | 
 |     __spin_lock; __spin_lock_init; __spin_lock_solid; __spin_try_lock; | 
 |     __spin_unlock; | 
 |   } | 
 | } |