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authorFlorian Weimer <fweimer@redhat.com>2020-07-24 16:50:38 +0200
committerFlorian Weimer <fweimer@redhat.com>2020-07-31 12:59:03 +0200
commit89c255294a5b14dd88e45ed3b2a2a66517ed1a6f (patch)
tree3f2f3f211b1c5955444c9655ee28cd3858b10682 /NEWS
parent20fb7452c04221608be1359cc100387db3e36356 (diff)
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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>
Diffstat (limited to 'NEWS')
-rw-r--r--NEWS8
1 files changed, 8 insertions, 0 deletions
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