The branch main has been updated by arichardson:
URL:
https://cgit.FreeBSD.org/src/commit/?id=34a006eaa39ceb6b0a96fa386c9b9b8a44681979
commit 34a006eaa39ceb6b0a96fa386c9b9b8a44681979
Author: Alex Richardson <arichard...@freebsd.org>
AuthorDate: 2025-09-15 22:14:18 +0000
Commit: Alex Richardson <arichard...@freebsd.org>
CommitDate: 2025-09-15 22:14:18 +0000
libc++: silence -Wnontrivial-memaccess warning with newer clang
Apply part of LLVM commit 71315698c91d0cda054b903da0594ca6f072c350 to
silence the -Wnontrivial-memaccess warning that is triggered any time
this function is instantiated by user code. This fixes another
buildworld failure with Clang HEAD.
Original commit message:
[clang] Warn about memset/memcpy to NonTriviallyCopyable types (#111434)
This implements a warning that's similar to what GCC does in that
context: both memcpy and memset require their first and second operand
to be trivially copyable, let's warn if that's not the case.
Reviewed by: emaste, dim
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D52534
---
.../llvm-project/libcxx/include/__memory/uninitialized_algorithms.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git
a/contrib/llvm-project/libcxx/include/__memory/uninitialized_algorithms.h
b/contrib/llvm-project/libcxx/include/__memory/uninitialized_algorithms.h
index 7475ef5cf85d..79cab80dcf73 100644
--- a/contrib/llvm-project/libcxx/include/__memory/uninitialized_algorithms.h
+++ b/contrib/llvm-project/libcxx/include/__memory/uninitialized_algorithms.h
@@ -642,7 +642,8 @@ __uninitialized_allocator_relocate(_Alloc& __alloc, _Tp*
__first, _Tp* __last, _
__guard.__complete();
std::__allocator_destroy(__alloc, __first, __last);
} else {
- __builtin_memcpy(const_cast<__remove_const_t<_Tp>*>(__result), __first,
sizeof(_Tp) * (__last - __first));
+ // Casting to void* to suppress clang complaining that this is technically
UB.
+
__builtin_memcpy(static_cast<void*>(const_cast<__remove_const_t<_Tp>*>(__result)),
__first, sizeof(_Tp) * (__last - __first));
}
}
