[gcc r16-9410] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:bbe4687e0014facee4e22ad96ad3400e1af00353

commit r16-9410-gbbe4687e0014facee4e22ad96ad3400e1af00353
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Mon Jul 27 00:21:19 2026 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP           |  2 +-
 gcc/cp/ChangeLog        | 10 ++++++++++
 gcc/testsuite/ChangeLog |  8 ++++++++
 libstdc++-v3/ChangeLog  | 21 +++++++++++++++++++++
 4 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index deff22c3cc66..8d1412f6b154 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20260726
+20260727
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index eb0791ff3b5f..b8f3c9eed430 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,13 @@
+2026-07-26  Patrick Palka  <ppalka@redhat.com>
+
+	Backported from master:
+	2026-07-25  Patrick Palka  <ppalka@redhat.com>
+
+	PR c++/126280
+	* pt.cc (mark_template_arguments_used): Split out loop into ...
+	(mark_template_arguments_used_1): ... here. Recurse into
+	argument packs.
+
 2026-07-23  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/126215
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 34dbcc5fbeee..d75d72c30083 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2026-07-26  Patrick Palka  <ppalka@redhat.com>
+
+	Backported from master:
+	2026-07-25  Patrick Palka  <ppalka@redhat.com>
+
+	PR c++/126280
+	* g++.dg/template/fn-ptr6.C: New test.
+
 2026-07-25  H.J. Lu  <hjl.tools@gmail.com>
 
 	Backported from master:
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index d448d75eebd2..cb7fbb01e18a 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,24 @@
+2026-07-26  Patrick Palka  <ppalka@redhat.com>
+
+	Backported from master:
+	2026-07-25  Patrick Palka  <ppalka@redhat.com>
+
+	* include/std/ranges (__detail::__compatible_joinable_ranges):
+	Remove.
+	(__detail::__concat_reference_t): Move definition up.
+	(__detail::__concat_value_t): Likewise.
+	(__detail::__concat_rvalue_reference_t): Likewise.
+	(__detail::__concat_indirectly_readable_impl): Likewise.
+	(__detail::__concat_indirectly_readable): Likewise.
+	(__detail::__concatable): Likewise.
+	(join_with_view): Use __concatable instead of
+	__compatible_joinable_ranges in constraints as per LWG 4074.
+	(join_with_view::begin): Add __concatable constraint as per
+	LWG 4074.
+	(join_with_view::end): Likewise.
+	(join_with_view::_Iterator): Adjust out-of-line declaration.
+	(join_with_view::_Sentinel): Likewise.
+
 2026-07-24  Tomasz Kamiński  <tkaminsk@redhat.com>
 	    Álvaro Begué  <alvaro.begue@gmail.com>