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-rw-r--r--sysdeps/pthread/Makefile3
-rw-r--r--sysdeps/pthread/call_once.c11
2 files changed, 11 insertions, 3 deletions
diff --git a/sysdeps/pthread/Makefile b/sysdeps/pthread/Makefile
index 8133bcda8f..adb4815b4e 100644
--- a/sysdeps/pthread/Makefile
+++ b/sysdeps/pthread/Makefile
@@ -32,7 +32,6 @@ headers += threads.h
 routines += thrd_current thrd_equal thrd_sleep thrd_yield
 
 libpthread-routines += thrd_create thrd_detach thrd_exit thrd_join \
-		       call_once \
 		       mtx_destroy mtx_init mtx_lock mtx_timedlock \
 		       mtx_trylock mtx_unlock \
 		       cnd_broadcast \
@@ -40,7 +39,7 @@ libpthread-routines += thrd_create thrd_detach thrd_exit thrd_join \
 		       tss_create tss_delete tss_get tss_set
 
 $(libpthread-routines-var) += \
-
+  call_once \
 
 tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
 	 tst-cnd-timedwait tst-thrd-detach tst-mtx-basic tst-thrd-sleep \
diff --git a/sysdeps/pthread/call_once.c b/sysdeps/pthread/call_once.c
index 9690530ab2..0847dbc9f4 100644
--- a/sysdeps/pthread/call_once.c
+++ b/sysdeps/pthread/call_once.c
@@ -17,11 +17,12 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <stdalign.h>
+#include <shlib-compat.h>
 
 #include "thrd_priv.h"
 
 void
-call_once (once_flag *flag, void (*func)(void))
+__call_once (once_flag *flag, void (*func)(void))
 {
   _Static_assert (sizeof (once_flag) == sizeof (pthread_once_t),
 		  "sizeof (once_flag) != sizeof (pthread_once_t)");
@@ -29,3 +30,11 @@ call_once (once_flag *flag, void (*func)(void))
 		  "alignof (once_flag) != alignof (pthread_once_t)");
   __pthread_once ((pthread_once_t *) flag, func);
 }
+#if PTHREAD_IN_LIBC
+versioned_symbol (libc, __call_once, call_once, GLIBC_2_34);
+# if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_28, GLIBC_2_34)
+compat_symbol (libpthread, __call_once, call_once, GLIBC_2_28);
+# endif
+#else /* !PTHREAD_IN_LIBC */
+strong_alias (__call_once, call_once)
+#endif