gcc/c/ChangeLog:

	PR middle-end/93926
	* c-decl.c (types_close_enough_to_match): New function.
	(match_builtin_function_types):
	(diagnose_mismatched_decls): Add missing inform call to a warning.

gcc/testsuite/ChangeLog:

	PR middle-end/93926
	* gcc.dg/Wbuiltin-declaration-mismatch-13.c: New test.

gcc/c/ChangeLog:

	PR c/93812
	* c-typeck.c (build_functype_attribute_variant): New function.
	(composite_type): Call it.

gcc/testsuite/ChangeLog:

	PR c/93812
	* gcc.dg/format/proto.c: New test.

PR middle-end/93829 - bogus -Wstringop-overflow on memcpy of a struct with a pointer member from another with a long string

gcc/testsuite/ChangeLog:

	PR middle-end/93829
	* gcc.dg/Wstringop-overflow-32.c: New test.

gcc/ChangeLog:

	PR middle-end/93829
	* tree-ssa-strlen.c (count_nonzero_bytes): Set the size to that
	  of a pointer in the outermost ADDR_EXPRs.

	PR testsuite/91797
	* gcc.target/pwoerpc/pr68805.c: Update expected output.

	PR testsuite/91799
	* gcc.target/powerpc/pr88233.c: Update expected output and
	add target selector.

Improve test coverage, NFC.

gcc/testsuite/ChangeLog:

2020-03-01 Iain Sandoe <iain@sandoe.co.uk>

	* g++.dg/coroutines/torture/class-07-data-member.C: New test.

The current imported libsanitizer code produces kernel panics for
Darwin 11 (macOS 10.7) and is unsupported for earlier versions already.

It is not clear if the current sources are even intended to be supported
on Darwin 11, so this patch causes the default to be build without
sanitizers for Darwin <= 11.

2020-03-01  Iain Sandoe  <iain@sandoe.co.uk>

	PR sanitizer/93731
	* configure.tgt (x86_64-*-darwin*, i?86-*-darwin*): Enable by
	default only for Darwin versions greater than 12 (macOS 10.8).

Darwin10 is no longer supported upstream and will not build without
additional patches.

	* config/abi/post/x86_64-linux-gnu/x32/baseline_symbols.txt: Updated.

Improve test coverage.

gcc/testsuite/ChangeLog:

2020-02-29  Iain Sandoe  <iain@sandoe.co.uk>

	* g++.dg/coroutines/coro1-ret-int-yield-int.h: Add templated
	awaitable.
	* g++.dg/coroutines/torture/co-await-15-return-non-triv.C: New test.

	* config/v850/v850.h (STATIC_CHAIN_REGNUM): Change to r19.
	* config/v850/v850.c (v850_asm_trampoline_template): Update
	accordingly.

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	PR ada/91100
	* gnat.dg/socket1.adb: Disable on hppa*-*-hpux*.

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	* g++.dg/pr90981.C: Skip on hppa*-*-hpux*.
	* gcc.dg/gnu2x-attrs-1.c: Add dg-require-alias.
	* gcc.dg/pr90756.c: Add -fno-common option on hppa*-*-hpux*.
	* gcc.dg/torture/20190327-1.c: Likewise.
	* gcc.dg/spellcheck-options-21.c: Skip on 32-bit hppa*-*-hpux*.
	* gcc.dg/strlenopt-68.c: Skip on hppa*-*-hpux*.
	* gcc.dg/torture/pr90020.c: Likewise.
	* gcc.dg/ucnid-16-utf8.c: Add dg-require-iconv "latin1".

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	PR ipa/92548
	* gcc.dg/ipa/ipa-sra-12.c: xfail parameter split test on 32-bit
	hppa*-*-hpux*.
	* gcc.dg/ipa/ipa-sra-14.c: Likewise.
	* gcc.dg/ipa/ipcp-agg-12.c: xfail adding extra caller test.

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	* testsuite/17_intro/headers/c++1998/charset.cc: Skip on *-*-hpux*.
	* testsuite/17_intro/headers/c++2011/charset.cc: Likewise.
	* testsuite/17_intro/headers/c++2014/charset.cc: Likewise.
	* testsuite/17_intro/headers/c++2017/charset.cc: Likewise.
	* testsuite/17_intro/headers/c++2020/charset.cc: Likewise.

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	* testsuite/30_threads/condition_variable_any/stop_token/wait_on.cc:
	Add libatomic option.
	* testsuite/30_threads/jthread/jthread.cc: Likewise.

Move std::is_permutation algorithm with associated helpers to stl_algobase.h
to remove stl_algo.h include from hashtable_policy.h and so reduce preprocess
size of unordered_map and unordered_set headers.

	* include/bits/stl_algo.h
	(__find_if, __count_if, __is_permutation, std::is_permutation): Move...
	* include/bits/stl_algobase.h: ...here.
	* include/bits/hashtable_policy.h: Remove <bits/stl_algo.h> include.

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	* testsuite/30_threads/stop_token/stop_callback.cc: Add libatomic
	option.
	* testsuite/30_threads/stop_token/stop_callback/deadlock-mt.cc:
	Likewise.
	* testsuite/30_threads/stop_token/stop_callback/deadlock.cc: Likewise.
	* testsuite/30_threads/stop_token/stop_callback/destroy.cc: Likewise.
	* testsuite/30_threads/stop_token/stop_callback/invoke.cc: Likewise.
	* testsuite/30_threads/stop_token/stop_source.cc: Likewise.
	* testsuite/30_threads/stop_token/stop_source/assign.cc: Likewise.
	* testsuite/30_threads/stop_token/stop_token.cc: Likewise.
	* testsuite/30_threads/stop_token/stop_token/stop_possible.cc:
	Likewise.

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	* /g++.dg/ext/visibility/ref-temp1.C: Require visibility.
	* gfortran.dg/pr90988_4.f: Likewise.
	* gfortran.dg/pr91372.f90: Likewise.

	2020-02-29  John David Anglin  <danglin@gcc.gnu.org>

	PR libstdc++/92906
	* config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.

	* gcc.target/or1k/return-2.c: Update expected output.

	* ru.po: Update.

	* gcc.target/xstormy16/sfr/06_sfrw_to_var.c: Update expected output.

The rule change in the title matches GCC's current behavior, so no change
was needed.  But the paper also makes 'typename' optional in a
requirement-parameter-list, so this implements that.

gcc/cp/ChangeLog
2020-02-28  Jason Merrill  <jason@redhat.com>

	Implement P2092R0, Disambiguating Nested-Requirements
	* parser.c (cp_parser_requirement_parameter_list): Pass
	CP_PARSER_FLAGS_TYPENAME_OPTIONAL.

We were enabling the memcmp optimization in ranges::lexicographical_compare for
signed integral types and for integral types wider than a byte.  But memcmp
gives the wrong answer for arrays of such types.  This patch fixes this issue by
refining the condition that enables the memcmp optimization.  It's now
consistent with the corresponding condition used in
std::lexicographical_compare.

libstdc++-v3/ChangeLog:

	PR libstdc++/93972
	* include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
	Fix condition for when to use memcmp, making it consistent with the
	corresponding condition used in std::lexicographical_compare.
	* testsuite/25_algorithms/lexicographical_compare/93972.cc: New test.

The awaitable initially committed was returning "always ready"
which meant that the suspension code was not used.  Update
the test to suspend at each co_await, since this exercises more
of the infrastructure.

gcc/testsuite/ChangeLog:

2020-02-28  Iain Sandoe  <iain@sandoe.co.uk>

	* g++.dg/coroutines/torture/func-params-08.C: Update
	to suspend for each co_await operation.

Set sigpc and implement dumpregs for linux/arm64.
Without this change, cmd/vet tool test will fail randomly.

Updates golang/go#20931

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/220543

Tested with

  make check RUNTESTFLAGS="conformance.exp=*numeric*synopsis* --target_board=unix/-std=$std"

for std in {c++98, c++11, c++17, c++2a}.

libstdc++-v3/ChangeLog:

	* testsuite/26_numerics/headers/numeric/synopsis.cc: Add signatures for
	functions introduced in C++11, C++17 and C++2a.  Add 'constexpr' to
	existing signatures for C++2a.

We don't want to promote a conversion from viable == 0 to viable == -1.
Found in ranges-v3.

gcc/cp/ChangeLog
2020-02-28  Jason Merrill  <jason@redhat.com>

	* call.c (build_user_type_conversion_1): Don't look at the second
	conversion of a non-viable candidate.

And it only needs to define _GLIBCXX_ASSERTIONS not _GLIBCXX_DEBUG.

	* testsuite/24_iterators/range_operations/advance_debug_neg.cc: Run
	test instead of just compiling it.

2020-02-28  Michael Meissner  <meissner@linux.ibm.com>

	PR target/93937
	* config/rs6000/vsx.md (vsx_extract_<mode>_<VS_scalar>mode_var):
	Delete, the insn will never work.

When the underlying range models common_range, then reverse_view::begin() is
already O(1) without caching.  So we should disable the cache in this case too.

libstdc++-v3/ChangeLog:

	* include/std/ranges (reverse_view::_S_needs_cached_begin): Set to false
	whenever the underlying range models common_range.