libcxx: update to LLVM 18

release/18.x branch, commit 78b99c73ee4b96fe9ce0e294d4632326afb2db42

This adds the flag `-D_LIBCPP_HARDENING_MODE` which is determined based
on the Zig optimization mode.

This commit also fixes libunwind, libcxx, and libcxxabi to properly
report sub compilation errors.

1 files changed, 31 insertions, 27 deletions

diff --git a/lib/libcxx/include/__iterator/ostream_iterator.h b/lib/libcxx/include/__iterator/ostream_iterator.h
index 025712bb1c..05697e62d9 100644
--- a/lib/libcxx/include/__iterator/ostream_iterator.h
+++ b/lib/libcxx/include/__iterator/ostream_iterator.h
@@ -11,11 +11,12 @@
 #define _LIBCPP___ITERATOR_OSTREAM_ITERATOR_H
 
 #include <__config>
+#include <__fwd/ostream.h>
+#include <__fwd/string.h>
 #include <__iterator/iterator.h>
 #include <__iterator/iterator_traits.h>
 #include <__memory/addressof.h>
 #include <cstddef>
-#include <iosfwd> // for forward declarations of char_traits and basic_ostream
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -30,40 +31,43 @@ class _LIBCPP_TEMPLATE_VIS ostream_iterator
     : public iterator<output_iterator_tag, void, void, void, void>
 #endif
 {
-_LIBCPP_SUPPRESS_DEPRECATED_POP
+  _LIBCPP_SUPPRESS_DEPRECATED_POP
+
 public:
-    typedef output_iterator_tag             iterator_category;
-    typedef void                            value_type;
+  typedef output_iterator_tag iterator_category;
+  typedef void value_type;
 #if _LIBCPP_STD_VER >= 20
-    typedef ptrdiff_t                       difference_type;
+  typedef ptrdiff_t difference_type;
 #else
-    typedef void                            difference_type;
+  typedef void difference_type;
 #endif
-    typedef void                            pointer;
-    typedef void                            reference;
-    typedef _CharT                          char_type;
-    typedef _Traits                         traits_type;
-    typedef basic_ostream<_CharT, _Traits>  ostream_type;
+  typedef void pointer;
+  typedef void reference;
+  typedef _CharT char_type;
+  typedef _Traits traits_type;
+  typedef basic_ostream<_CharT, _Traits> ostream_type;
 
 private:
-    ostream_type* __out_stream_;
-    const char_type* __delim_;
+  ostream_type* __out_stream_;
+  const char_type* __delim_;
+
 public:
-    _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT
-        : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {}
-    _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT
-        : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {}
-    _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value)
-        {
-            *__out_stream_ << __value;
-            if (__delim_)
-                *__out_stream_ << __delim_;
-            return *this;
-        }
+  _LIBCPP_HIDE_FROM_ABI ostream_iterator(ostream_type& __s) _NOEXCEPT
+      : __out_stream_(std::addressof(__s)),
+        __delim_(nullptr) {}
+  _LIBCPP_HIDE_FROM_ABI ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT
+      : __out_stream_(std::addressof(__s)),
+        __delim_(__delimiter) {}
+  _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator=(const _Tp& __value) {
+    *__out_stream_ << __value;
+    if (__delim_)
+      *__out_stream_ << __delim_;
+    return *this;
+  }
 
-    _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*()     {return *this;}
-    _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++()    {return *this;}
-    _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;}
+  _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator*() { return *this; }
+  _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator++() { return *this; }
+  _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator++(int) { return *this; }
 };
 
 _LIBCPP_END_NAMESPACE_STD