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libstdc++: Fix testsuite failures and warnings due to is_pod deprecation 

With -std=gnu++2a and -Wsystem-headers the std::is_pod deprecation
causes some new diagnostics. This suppresses them.

	* include/experimental/type_traits (experimental::is_pod_v): Disable
	-Wdeprecated-declarations warnings around reference to std::is_pod.
	* include/std/type_traits (is_pod_v): Likewise.
	* testsuite/18_support/max_align_t/requirements/2.cc: Also check
	is_standard_layout and is_trivial. Do not check is_pod for C++20.
	* testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
	Add -Wno-deprecated for C++20.
	* testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
	* testsuite/20_util/is_pod/value.cc: Likewise.
	* testsuite/experimental/type_traits/value.cc: Likewise.

From-SVN: r280066
This commit is contained in:
Jonathan Wakely 2020-01-09 21:31:50 +00:00 committed by Jonathan Wakely
parent 1a6c5064f9
commit caa39b2e84
8 changed files with 27 additions and 0 deletions
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13
libstdc++-v3/ChangeLog
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@ -1,3 +1,16 @@
2020-01-09 Jonathan Wakely <jwakely@redhat.com>
* include/experimental/type_traits (experimental::is_pod_v): Disable
-Wdeprecated-declarations warnings around reference to std::is_pod.
* include/std/type_traits (is_pod_v): Likewise.
* testsuite/18_support/max_align_t/requirements/2.cc: Also check
is_standard_layout and is_trivial. Do not check is_pod for C++20.
* testsuite/20_util/is_pod/requirements/explicit_instantiation.cc:
Add -Wno-deprecated for C++20.
* testsuite/20_util/is_pod/requirements/typedefs.cc: Likewise.
* testsuite/20_util/is_pod/value.cc: Likewise.
* testsuite/experimental/type_traits/value.cc: Likewise.
2020-01-09 JeanHeyd "ThePhD" Meneide <phdofthehouse@gmail.com>
* include/bits/c++config (_GLIBCXX20_DEPRECATED): Add new macro.

3
libstdc++-v3/include/experimental/type_traits
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@ -110,8 +110,11 @@ template <typename _Tp>
constexpr bool is_trivially_copyable_v = is_trivially_copyable<_Tp>::value;
template <typename _Tp>
constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
template <typename _Tp>
constexpr bool is_pod_v = is_pod<_Tp>::value;
#pragma GCC diagnostic pop
template <typename _Tp>
constexpr bool is_literal_type_v = is_literal_type<_Tp>::value;
template <typename _Tp>

3
libstdc++-v3/include/std/type_traits
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@ -3079,9 +3079,12 @@ template <typename _Tp>
is_trivially_copyable<_Tp>::value;
template <typename _Tp>
inline constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
template <typename _Tp>
_GLIBCXX20_DEPRECATED("use is_standard_layout_v && is_trivial_v instead")
inline constexpr bool is_pod_v = is_pod<_Tp>::value;
#pragma GCC diagnostic pop
template <typename _Tp>
inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value;
template <typename _Tp>

4
libstdc++-v3/testsuite/18_support/max_align_t/requirements/2.cc
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@ -20,4 +20,8 @@
#include <cstddef>
#include <type_traits>
#if __cplusplus <= 201703L
static_assert (std::is_pod<std::max_align_t>::value, "");
#endif
static_assert (std::is_standard_layout<std::max_align_t>::value, "");
static_assert (std::is_trivial<std::max_align_t>::value, "");

1
libstdc++-v3/testsuite/20_util/is_pod/requirements/explicit_instantiation.cc
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@ -1,4 +1,5 @@
// { dg-do compile { target c++11 } }
// { dg-additional-options "-Wno-deprecated" { target { c++2a } } }
// 2010-02-21 Paolo Carlini <paolo.carlini@oracle.com>
// Copyright (C) 2010-2020 Free Software Foundation, Inc.

1
libstdc++-v3/testsuite/20_util/is_pod/requirements/typedefs.cc
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@ -1,4 +1,5 @@
// { dg-do compile { target c++11 } }
// { dg-additional-options "-Wno-deprecated" { target { c++2a } } }
// 2010-02-21 Paolo Carlini <paolo.carlini@oracle.com>
//

1
libstdc++-v3/testsuite/20_util/is_pod/value.cc
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@ -1,4 +1,5 @@
// { dg-do compile { target c++11 } }
// { dg-additional-options "-Wno-deprecated" { target { c++2a } } }
// 2010-02-21 Paolo Carlini <pcarlini@suse.de>
//

1
libstdc++-v3/testsuite/experimental/type_traits/value.cc
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@ -1,4 +1,5 @@
// { dg-do compile { target c++14 } }
// { dg-additional-options "-Wno-deprecated" { target { c++2a } } }
// Copyright (C) 2014-2020 Free Software Foundation, Inc.
//