[llvm] [clang] [lld] [libcxx] [flang] [libc++][streams] P1759R6: Native handles and file streams (PR #76632)

[Mark de Wever via cfe-commits]

================
@@ -210,6 +217,12 @@ _LIBCPP_PUSH_MACROS
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+#  if _LIBCPP_STD_VER >= 26
+#    if defined(_LIBCPP_WIN32API)
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mordante wrote:

```suggestion
#  if _LIBCPP_STD_VER >= 26 && defined(_LIBCPP_WIN32API)
```

https://github.com/llvm/llvm-project/pull/76632