[gcc r13-8264] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:d87798118f0104053f7df9c3715463a6ace8fc1d

commit r13-8264-gd87798118f0104053f7df9c3715463a6ace8fc1d
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Wed Jan 31 00:24:03 2024 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP          |  2 +-
 libstdc++-v3/ChangeLog | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index d984acab2fc7..e288d0c78f46 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20240130
+20240131
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index fc6ba9b838ac..b2dad84b3545 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,44 @@
+2024-01-30  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2024-01-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/113500
+	* include/bits/chrono_io.h (__formatter_chrono::_M_S): Fix
+	printing of subseconds with floating-point rep.
+	(__formatter_chrono::_M_format_to_ostream): Do not write
+	time_point specializations directly to the ostream.
+	(formatter<chrono::sys_time<D>, C>::parse): Do not allow an
+	empty chrono-spec if the type fails to meet the constraints for
+	writing to an ostream with operator<<.
+	* testsuite/std/time/clock/file/io.cc: Check formatting
+	non-integral times with empty chrono-specs.
+	* testsuite/std/time/clock/gps/io.cc: Likewise.
+	* testsuite/std/time/clock/utc/io.cc: Likewise.
+	* testsuite/std/time/hh_mm_ss/io.cc: Likewise.
+
+2024-01-30  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2024-01-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/bits/chrono.h (__file_clock::from_sys)
+	(__file_clock::to_sys, __file_clock::_S_from_sys)
+	(__file_clock::_S_to_sys): Use common_type for return type.
+	* testsuite/std/time/clock/file/members.cc: Check round trip
+	conversion for time with lower precision that seconds.
+
+2024-01-30  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2024-01-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/113512
+	* include/std/format (__formatter_fp::format): Fix logic for
+	alternate forms.
+	* testsuite/std/format/functions/format.cc: Check buggy cases of
+	alternate forms with g presentation type.
+
 2024-01-18  Jonathan Wakely  <jwakely@redhat.com>
 
 	Backported from master: