[gcc r11-8288] Daily bump.

[gcc r11-8288] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:5b2ac9b40c325e9209c0bd55955db84aad4a0cc5

commit r11-8288-g5b2ac9b40c325e9209c0bd55955db84aad4a0cc5
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Sat Apr 24 00:18:21 2021 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP           |  2 +-
 gcc/testsuite/ChangeLog | 10 ++++++++++
 libstdc++-v3/ChangeLog  | 19 +++++++++++++++++++
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index 7e3f420e369..26da51d2f9b 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20210423
+20210424
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index de72b76f878..225f7e9adeb 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,13 @@
+2021-04-23  Tobias Burnus  <tobias@codesourcery.com>
+
+	Backported from master:
+	2021-04-22  Tobias Burnus  <tobias@codesourcery.com>
+
+	* substr_9.f90: Move to ...
+	* gfortran.dg/substr_9.f90: ... here.
+	* substr_10.f90: Move to ...
+	* gfortran.dg/substr_10.f90: ... here.
+
 2021-04-22  Tobias Burnus  <tobias@codesourcery.com>
 
 	Backported from master:
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 9c35569c2db..91bbeb65374 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,22 @@
+2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
+	Handle system_clock as well as steady_clock.
+	* testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
+	* testsuite/30_threads/semaphore/try_acquire_until.cc:
+	Re-enable.
+
+2021-04-23  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2021-04-22  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/30_threads/semaphore/try_acquire_posix.cc: Add
+	options for libatomic.
+
 2021-04-22  Thomas Rodgers  <rodgert@twrodgers.com>
 
 	Backported from master: