https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112858
--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Earlier in 'libstdc++-v3/libsupc++/atexit_thread.cc', we have:
[...]
#if _GLIBCXX_HAVE___CXA_THREAD_ATEXIT
// Libc provides __cxa_thread_atexit definition.
#elif _GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL
extern "C" int __cxa_thread_atexit_impl (void (_GLIBCXX_CDTOR_CALLABI
*func) (void *),
void *arg, void *d);
extern "C" int
__cxxabiv1::__cxa_thread_atexit (void (_GLIBCXX_CDTOR_CALLABI *dtor)(void
*),
void *obj, void *dso_handle)
_GLIBCXX_NOTHROW
{
return __cxa_thread_atexit_impl (dtor, obj, dso_handle);
}
#else /* _GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL */
[...]
..., that is, indeed a non-weak '__cxa_thread_atexit_impl' declaration --
however, that's active only if not '_GLIBCXX_HAVE___CXA_THREAD_ATEXIT' and not
'_GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL', but we have per
'include/nvptx-none/bits/c++config.h':
/* Define to 1 if you have the `__cxa_thread_atexit' function. */
/* #undef _GLIBCXX_HAVE___CXA_THREAD_ATEXIT */
/* Define to 1 if you have the `__cxa_thread_atexit_impl' function. */
/* #undef _GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL */
