[gcc r9-8929] Daily bump.

[GCC Administrator <gccadmin@gcc.gnu.org>]

https://gcc.gnu.org/g:6dceae0cb9c724591fc86e30daafdbeaa1eeb993

commit r9-8929-g6dceae0cb9c724591fc86e30daafdbeaa1eeb993
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Tue Sep 22 00:18:22 2020 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP          |  2 +-
 libstdc++-v3/ChangeLog | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index fb22edf35a9..ca3ee10cb82 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20200921
+20200922
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 6a646977866..c1823865056 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,68 @@
+2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2020-08-28  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/92978
+	* include/std/numeric (__abs_integral): Replace with ...
+	(__detail::__absu): New function template that returns an
+	unsigned type, guaranteeing it can represent the most
+	negative signed value.
+	(__detail::__gcd, __detail::__lcm): Require arguments to
+	be unsigned and therefore already non-negative.
+	(gcd, lcm): Convert arguments to absolute value as unsigned
+	type before calling __detail::__gcd or __detail::__lcm.
+	* include/experimental/numeric (gcd, lcm): Likewise.
+	* testsuite/26_numerics/gcd/gcd_neg.cc: Adjust expected
+	errors.
+	* testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
+	* testsuite/26_numerics/gcd/92978.cc: New test.
+	* testsuite/26_numerics/lcm/92978.cc: New test.
+	* testsuite/experimental/numeric/92978.cc: New test.
+
+2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/94681
+	* src/c++17/fs_ops.cc (read_symlink): Use posix::lstat instead
+	of calling ::lstat directly.
+	* src/filesystem/ops.cc (read_symlink): Likewise.
+
+2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2020-08-10  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/94681
+	* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Do not depend on
+	$enable_libstdcxx_filesystem_ts.
+	* configure: Regenerate.
+
+2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2020-09-20  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/97101
+	* include/std/functional (bind_front): Fix order of parameters
+	in is_nothrow_constructible_v specialization.
+	* testsuite/20_util/function_objects/bind_front/97101.cc: New test.
+
+2020-09-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2020-09-10  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/94160
+	* src/c++17/memory_resource.cc (munge_options): Round
+	max_blocks_per_chunk to a multiple of four.
+	(__pool_resource::_M_alloc_pools()): Simplify slightly.
+	* testsuite/20_util/unsynchronized_pool_resource/allocate.cc:
+	Check that valid pointers are returned when small values are
+	used for max_blocks_per_chunk.
+
 2020-09-11  Jonathan Wakely  <jwakely@redhat.com>
 
 	Backported from master: