llvm-project

da161950 - [libc++abi] Define `__cxa_thread_atexit` on platforms that need it (#186054)

[libc++abi] Define `__cxa_thread_atexit` on platforms that need it (#186054) Commit 3c100d5d548d removed the definition of __cxa_thread_atexit from all platforms except Fuchsia and Linux. This broke the use of `thread_local` variables with destructors on other downstream configurations that needed the definition. This patch restores __cxa_thread_atexit on (presumably) all platforms that need it. Co-authored-by: Louis Dionne <ldionne.2@gmail.com>