[gcc r15-10876] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:57f7b7fba5dbb4e77536840b685a96ed980f0dc1

commit r15-10876-g57f7b7fba5dbb4e77536840b685a96ed980f0dc1
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Wed Mar 4 00:20:07 2026 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP           |  2 +-
 gcc/cp/ChangeLog        | 13 +++++++++++++
 gcc/testsuite/ChangeLog | 19 +++++++++++++++++++
 libstdc++-v3/ChangeLog  | 14 ++++++++++++++
 4 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index 695f2b9c8e65..1b28e5c81f42 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20260303
+20260304
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 00b93787ca2b..143e8476b03a 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,16 @@
+2026-03-03  Patrick Palka  <ppalka@redhat.com>
+
+	Backported from master:
+	2026-01-30  Patrick Palka  <ppalka@redhat.com>
+
+	PR c++/123845
+	PR libstdc++/114865
+	* constexpr.cc (build_data_member_initialization): Remove
+	C++11-specific recognition of MODIFY_EXPR.
+	(check_constexpr_ctor_body): Relax error diagnostic to a
+	pedwarn and don't clear DECL_DECLARED_CONSTEXPR_P upon
+	error.  Return true if complaining.
+
 2026-02-19  Patrick Palka  <ppalka@redhat.com>
 
 	Backported from master:
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8057949f075b..3ae44f920279 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,22 @@
+2026-03-03  Patrick Palka  <ppalka@redhat.com>
+
+	Backported from master:
+	2026-01-30  Patrick Palka  <ppalka@redhat.com>
+
+	PR c++/123845
+	PR libstdc++/114865
+	* g++.dg/cpp0x/constexpr-ex3.C: Adjust C++11 non-empty
+	constexpr constructor dg-error to a dg-warning.  Expect
+	a follow-up missing member initializer diagnostic in C++11 mode.
+	* g++.dg/cpp2a/constexpr-try1.C: Expect a follow-up
+	compound-statement in constexpr function diagnostic in C++11
+	mode.
+	* g++.dg/cpp2a/constexpr-try2.C: Likewise.  Adjust C++11
+	non-empty constexpr constructor dg-error to a dg-warning.
+	* g++.dg/cpp2a/constexpr-try3.C:  Adjust C++11 non-empty
+	constexpr constructor dg-error to a dg-warning.
+	* g++.dg/cpp0x/constexpr-ctor23.C: New test.
+
 2026-03-02  Tamar Christina  <tamar.christina@arm.com>
 
 	Backported from master:
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 7728740d51a7..cc92afbcfb29 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,17 @@
+2026-03-03  Patrick Palka  <ppalka@redhat.com>
+
+	Backported from master:
+	2026-02-12  Patrick Palka  <ppalka@redhat.com>
+
+	PR libstdc++/114865
+	* include/std/atomic (atomic<_Tp>::atomic(_Tp)) [C++11]:
+	Enable __builtin_clear_padding logic.
+	* testsuite/29_atomics/atomic/compare_exchange_padding.cc: Enable
+	this test in earlier modes, including C++11.
+	* testsuite/29_atomics/atomic/cons/zero_padding.cc [C++11]:
+	Enable tests verifying cleared padding bits for a non-static-init
+	std::atomic object.
+
 2026-02-26  Tomasz Kamiński  <tkaminsk@redhat.com>
 
 	PR libstdc++/123875