[PATCH] NEWS: Deprecate weak libpthread symbols for single-threaded checks

[Carlos O'Donell]

On 7/24/20 10:50 AM, Florian Weimer via Libc-alpha wrote:
> Recommend the new __libc_single_thread variable instead.
> 
> ---
>  NEWS | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/NEWS b/NEWS
> index 83aed60e19..7fb167e650 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -134,6 +134,14 @@ Deprecated and removed features, and other changes affecting compatibility:
>    or contents might be overwritten on subsequent calls in the same thread or
>    if the thread is terminated.  It makes strerror MT-safe.
>  
> +* Using weak references to libpthread functions such as pthread_create
> +  or pthread_key_create to detect the singled-threaded nature of a
> +  program is an obsolescent feature.  Future versions of glibc will
> +  define pthread_create within libc.so.6 itself, so such checks will
> +  always flag the program as multi-threaded.  Applications should check
> +  the __libc_single_threaded variable declared in
> +  <sys/single_threaded.h> instead.
> +
>  * The "files" NSS module no longer supports the "key" database (used for
>    secure RPC).  The contents of the /etc/publickey file will be ignored,
>    regardless of the settings in /etc/nsswitch.conf.  (This method of
> 

OK for 2.32.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

-- 
Cheers,
Carlos.