[gcc/devel/sphinx] Merge branch 'master' into devel/sphinx

[Martin Liska]

https://gcc.gnu.org/g:1775bce3a2c144c9a4dbea941298a14f01d2c6b3

commit 1775bce3a2c144c9a4dbea941298a14f01d2c6b3
Merge: c0f8bdc00d1 f389f2a0352
Author: Martin Liska <mliska@suse.cz>
Date:   Mon Jun 14 15:38:04 2021 +0200

    Merge branch 'master' into devel/sphinx

Diff:

 gcc/config.gcc                                     | 44 ++++++++++++++++---
 gcc/config/arc/arc.h                               |  4 ++
 gcc/doc/invoke.texi                                |  4 +-
 gcc/fortran/resolve.c                              |  1 -
 gcc/testsuite/gcc.dg/sms-1.c                       |  2 -
 gcc/testsuite/gcc.dg/sms-10.c                      |  3 --
 gcc/testsuite/gcc.dg/sms-2.c                       |  2 -
 gcc/testsuite/gcc.dg/sms-3.c                       |  3 --
 gcc/testsuite/gcc.dg/sms-4.c                       |  3 --
 gcc/testsuite/gcc.dg/sms-6.c                       |  2 -
 gcc/testsuite/gcc.dg/sms-8.c                       |  4 --
 libstdc++-v3/include/std/tuple                     |  2 +-
 libstdc++-v3/libsupc++/compare                     | 51 +++++++++++-----------
 .../17_intro/headers/c++2011/all_attributes.cc     |  1 +
 .../17_intro/headers/c++2014/all_attributes.cc     |  1 +
 .../17_intro/headers/c++2017/all_attributes.cc     |  2 +
 .../18_support/comparisons/algorithms/fallback.cc  | 42 ++++++++++++++++++
 17 files changed, 118 insertions(+), 53 deletions(-)