Upstream submission:

  <https://sourceware.org/pipermail/libc-alpha/2021-June/128163.html>

Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon Jun 28 10:25:21 2021 +0200

    nptl: Rename nptl_version to __nptl_version
    
    This prepares it for exporting as a dynamic symbol.

diff --git a/nptl_db/structs.def b/nptl_db/structs.def
index fb7bb9367d7c01ec..248ecf43358dd7ae 100644
--- a/nptl_db/structs.def
+++ b/nptl_db/structs.def
@@ -73,7 +73,7 @@ DB_STRUCT (td_eventbuf_t)
 DB_STRUCT_FIELD (td_eventbuf_t, eventnum)
 DB_STRUCT_FIELD (td_eventbuf_t, eventdata)
 
-DB_SYMBOL (nptl_version)
+DB_SYMBOL (__nptl_version)
 DB_SYMBOL (__nptl_create_event)
 DB_SYMBOL (__nptl_death_event)
 DB_SYMBOL (__nptl_threads_events)
diff --git a/nptl_db/td_ta_new.c b/nptl_db/td_ta_new.c
index 501d922ea269f703..eeca29d5a0f7be9f 100644
--- a/nptl_db/td_ta_new.c
+++ b/nptl_db/td_ta_new.c
@@ -39,7 +39,7 @@ td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)
   LOG ("td_ta_new");
 
   /* Check whether the versions match.  */
-  if (td_lookup (ps, SYM_nptl_version, &versaddr) != PS_OK)
+  if (td_lookup (ps, SYM___nptl_version, &versaddr) != PS_OK)
     return TD_NOLIBTHREAD;
   if (ps_pdread (ps, versaddr, versbuf, sizeof (versbuf)) != PS_OK)
     return TD_ERR;