NEWS: Deprecate weak libpthread symbols for single-threaded checks

Recommend the new __libc_single_thread variable instead.

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

diff --git a/NEWS b/NEWS
index 83aed60e19714d2e6a1835e6083425d524a466c6..7fb167e65098f2c4245777883c06341965c88fec 100644 (file)
--- 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