[gcc r10-9998] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:20f5a56a1a67ebb94971263921ad8ca39f7411a3

commit r10-9998-g20f5a56a1a67ebb94971263921ad8ca39f7411a3
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Fri Jul 23 00:17:22 2021 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP          |  2 +-
 libstdc++-v3/ChangeLog | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index 9f48762c747..dd601225256 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20210722
+20210723
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 48395627ef1..f3b21c28bc9 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,28 @@
+2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2021-04-15  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/96657
+	* libsupc++/Makefile.am: Add atomicity.cc here.
+	* src/c++98/Makefile.am: Remove it from here.
+	* libsupc++/Makefile.in: Regenerate.
+	* src/c++98/Makefile.in: Regenerate.
+	* testsuite/18_support/exception_ptr/96657.cc: New test.
+
+2021-07-22  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2021-06-07  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/98842
+	* include/std/optional (operator<=>(const optional<T>& const U&)):
+	Add missing constraint and add workaround for template
+	recursion.
+	* testsuite/20_util/optional/relops/three_way.cc: Check that
+	type without equality comparison cannot be compared when wrapped
+	in std::optional.
+
 2021-07-14  Jonathan Wakely  <jwakely@redhat.com>
 
 	Backported from master: