[PATCH] NEWS: Deprecate weak libpthread symbols for single-threaded checks
Florian Weimer
fweimer@redhat.com
Fri Jul 24 14:50:47 GMT 2020
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
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