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, 21 insertions, 24 deletions

diff --git a/lib/libcxx/include/__algorithm/reverse.h b/lib/libcxx/include/__algorithm/reverse.h
index aa76951707..4167c9116d 100644
--- a/lib/libcxx/include/__algorithm/reverse.h
+++ b/lib/libcxx/include/__algorithm/reverse.h
@@ -19,47 +19,44 @@
 #  pragma GCC system_header
 #endif
 
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _AlgPolicy, class _BidirectionalIterator>
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-__reverse_impl(_BidirectionalIterator __first, _BidirectionalIterator __last, bidirectional_iterator_tag)
-{
-    while (__first != __last)
-    {
-        if (__first == --__last)
-            break;
-        _IterOps<_AlgPolicy>::iter_swap(__first, __last);
-        ++__first;
-    }
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
+__reverse_impl(_BidirectionalIterator __first, _BidirectionalIterator __last, bidirectional_iterator_tag) {
+  while (__first != __last) {
+    if (__first == --__last)
+      break;
+    _IterOps<_AlgPolicy>::iter_swap(__first, __last);
+    ++__first;
+  }
 }
 
 template <class _AlgPolicy, class _RandomAccessIterator>
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-__reverse_impl(_RandomAccessIterator __first, _RandomAccessIterator __last, random_access_iterator_tag)
-{
-    if (__first != __last)
-        for (; __first < --__last; ++__first)
-            _IterOps<_AlgPolicy>::iter_swap(__first, __last);
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
+__reverse_impl(_RandomAccessIterator __first, _RandomAccessIterator __last, random_access_iterator_tag) {
+  if (__first != __last)
+    for (; __first < --__last; ++__first)
+      _IterOps<_AlgPolicy>::iter_swap(__first, __last);
 }
 
 template <class _AlgPolicy, class _BidirectionalIterator, class _Sentinel>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-void __reverse(_BidirectionalIterator __first, _Sentinel __last) {
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __reverse(_BidirectionalIterator __first, _Sentinel __last) {
   using _IterCategory = typename _IterOps<_AlgPolicy>::template __iterator_category<_BidirectionalIterator>;
   std::__reverse_impl<_AlgPolicy>(std::move(__first), std::move(__last), _IterCategory());
 }
 
 template <class _BidirectionalIterator>
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
-void
-reverse(_BidirectionalIterator __first, _BidirectionalIterator __last)
-{
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
+reverse(_BidirectionalIterator __first, _BidirectionalIterator __last) {
   std::__reverse<_ClassicAlgPolicy>(std::move(__first), std::move(__last));
 }
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // _LIBCPP___ALGORITHM_REVERSE_H