| Issue |
117630
|
| Summary |
Regression: <chrono> does not compile on macOS with `_XOPEN_SOURCE` defined
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
nico
|
Repro (minified from absl's time_zone_format.cc):
```
% cat chrono.cc
#if !defined(_XOPEN_SOURCE) && !defined(__FreeBSD__) && !defined(__OpenBSD__)
#define _XOPEN_SOURCE 500 // Exposes definitions for SUSv2 (UNIX 98).
#endif
#include <chrono>
```
```
% clang++ -I../../buildtools/third_party/libc++ -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -nostdinc++ -isystem../../third_party/libc++/src/include -c chrono.cc -std=c++20
In file included from chrono.cc:5:
In file included from ../../third_party/libc++/src/include/chrono:969:
In file included from ../../third_party/libc++/src/include/__chrono/formatter.h:29:
In file included from ../../third_party/libc++/src/include/__chrono/ostream.h:36:
In file included from ../../third_party/libc++/src/include/__format/format_functions.h:21:
In file included from ../../third_party/libc++/src/include/__format/format_context.h:28:
In file included from ../../third_party/libc++/src/include/__locale:14:
In file included from ../../third_party/libc++/src/include/__locale_dir/locale_base_api.h:98:
In file included from ../../third_party/libc++/src/include/__locale_dir/support/apple.h:18:
../../third_party/libc++/src/include/__locale_dir/support/bsd_like.h:149:10: error: no member named 'wcsnrtombs_l' in the global namespace; did you mean '__wcsnrtombs'?
149 | return ::wcsnrtombs_l(__dest, __src, __nwc, __len, __ps, __loc);
| ^~
../../third_party/libc++/src/include/__locale_dir/support/bsd_like.h:148:1: note: '__wcsnrtombs' declared here
148 | __wcsnrtombs(char* __dest, const wchar_t** __src, size_t __nwc, size_t __len, mbstate_t* __ps, __locale_t __loc) {
| ^
../../third_party/libc++/src/include/__locale_dir/support/bsd_like.h:158:10: error: no member named 'mbsnrtowcs_l' in the global namespace; did you mean '__mbsnrtowcs'?
158 | return ::mbsnrtowcs_l(__dest, __src, __nms, __len, __ps, __loc);
| ^~
../../third_party/libc++/src/include/__locale_dir/support/bsd_like.h:157:1: note: '__mbsnrtowcs' declared here
157 | __mbsnrtowcs(wchar_t* __dest, const char** __src, size_t __nms, size_t __len, mbstate_t* __ps, __locale_t __loc) {
| ^
```
(We might be able to work around this by defining `_XOPEN_SOURCE` with a `-D` flag while compiling that file, haven't tried that yet.)
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