src/lib/libc/stdlib/cxa_thread_atexit_impl.c, branch releng/13.1 FreeBSD source tree Export __cxa_thread_atexit_impl as an alias for __cxa_thread_atexit. 2017-01-07T16:05:19+00:00 Konstantin Belousov kib@FreeBSD.org 2017-01-07T16:05:19+00:00 b7c7684ae2754d4ef865bb62ce2c502b0d22ad62 libstdc++ before gcc r244057 expected that libc provided __cxa_thread_atexit_impl, and libstdc++ implemented __cxa_thread_atexit, by forwarding the calls to _impl. Mentioned gcc revision checks for __cxa_thread_atexit in libc and does not provide the symbol from libstdc++ if found. This change helps older gcc, in particular, all released versions which implement thread_local, by consolidating the implementation into libc. For that versions, if configured with the current libc, the __cxa_thread_atexit is exported from libstdc++ as a trivial wrapper around libc::__cxa_thread_atexit_impl. The __cxa_thread_atexit implementation is put into separate source file to allow for static linking with older libstdc++.a. gcc bugzilla: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78968 Reported by: Hannes Hauswedell <h2+fbsdports@fsfe.org> PR: 215709 Sponsored by: The FreeBSD Foundation MFC after: 2 weeks 
libstdc++ before gcc r244057 expected that libc provided
__cxa_thread_atexit_impl, and libstdc++ implemented
__cxa_thread_atexit, by forwarding the calls to _impl.  Mentioned gcc
revision checks for __cxa_thread_atexit in libc and does not provide
the symbol from libstdc++ if found.

This change helps older gcc, in particular, all released versions
which implement thread_local, by consolidating the implementation into
libc.  For that versions, if configured with the current libc, the
__cxa_thread_atexit is exported from libstdc++ as a trivial wrapper
around libc::__cxa_thread_atexit_impl.

The __cxa_thread_atexit implementation is put into separate source
file to allow for static linking with older libstdc++.a.

gcc bugzilla:	https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78968
Reported by:	Hannes Hauswedell <h2+fbsdports@fsfe.org>
PR:	215709
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks