blob: 6c6bec59e325ec692a44c7a856d5671c8305ad5b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// Copyright 2020 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#pragma once
// libc++ uses a special namespace for standard library headers. Use this
// namespace via the defines in <__config>.
#if defined(_LIBCPP_VERSION) && __has_include(<__config>)
#include <__config>
#define _PW_POLYFILL_BEGIN_NAMESPACE_STD _LIBCPP_BEGIN_NAMESPACE_STD
#define _PW_POLYFILL_END_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
#else // Directly use the std namespace in GCC.
#define _PW_POLYFILL_BEGIN_NAMESPACE_STD namespace std {
#define _PW_POLYFILL_END_NAMESPACE_STD } // namespace std
// Cannot compile when using libc++ without the <__config> header.
#ifdef _LIBCPP_VERSION
static_assert(
false,
"Compiling against libc++, but the <__config> header is not available. "
"The <__config> header provides various _LIBCPP defines used internally "
"by libc++. pw_polyfill needs this header for the "
"_LIBCPP_BEGIN_NAMESPACE_STD and _LIBCPP_END_NAMESPACE_STD macros, which "
"specify the namespace to use for the standard library. "
""
"If you see this message, you may be compiling with Clang, but without "
"libc++, in which case a fake <__config> header should be provided. "
"Alternately, libc++ may have been updated and no longer provides "
"<__config>, in which this file should be updated to properly "
"set _PW_POLYFILL_BEGIN_NAMESPACE_STD and _PW_POLYFILL_END_NAMESPACE_STD.");
#endif // _LIBCPP_VERSION
#endif // defined(_LIBCPP_VERSION) && __has_include(<__config>)
|
