update libcxx to latest llvm release/13.x

rc1 + 98feb20df14e6cf9ce77f097ceb8dd188c9070a7
This commit is contained in:
Andrew Kelley 2021-08-18 15:27:00 -07:00
parent 92b69215e6
commit 87d5db057b
2 changed files with 12 additions and 1 deletions

View file

@ -352,6 +352,16 @@
# define _LIBCPP_NO_CFI
#endif
// If the compiler supports using_if_exists, pretend we have those functions and they'll
// be picked up if the C library provides them.
//
// TODO: Once we drop support for Clang 12, we can assume the compiler supports using_if_exists
// for platforms that don't have a conforming C11 library, so we can drop this whole thing.
#if __has_attribute(using_if_exists)
# define _LIBCPP_HAS_TIMESPEC_GET
# define _LIBCPP_HAS_QUICK_EXIT
# define _LIBCPP_HAS_ALIGNED_ALLOC
#else
#if (defined(__ISO_C_VISIBLE) && (__ISO_C_VISIBLE >= 2011)) || __cplusplus >= 201103L
# if defined(__FreeBSD__)
# define _LIBCPP_HAS_ALIGNED_ALLOC
@ -406,6 +416,7 @@
# endif
# endif // __APPLE__
#endif
#endif // __has_attribute(using_if_exists)
#ifndef _LIBCPP_CXX03_LANG
# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)

View file

@ -59,7 +59,7 @@ int timespec_get( struct timespec *ts, int base); // C++17
// we're detecting this here instead of in <__config> because we can't include
// system headers from <__config>, since it leads to circular module dependencies.
// This is also meant to be a very temporary workaround until the SDKs are fixed.
#if defined(__APPLE__)
#if defined(__APPLE__) && !__has_attribute(using_if_exists)
# include <sys/cdefs.h>
# if defined(_LIBCPP_HAS_TIMESPEC_GET) && (__DARWIN_C_LEVEL < __DARWIN_C_FULL)
# define _LIBCPP_HAS_TIMESPEC_GET_NOT_ACTUALLY_PROVIDED