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, 16 insertions, 15 deletions

diff --git a/lib/libcxx/include/__algorithm/remove.h b/lib/libcxx/include/__algorithm/remove.h
index 533e41b54f..1498852c43 100644
--- a/lib/libcxx/include/__algorithm/remove.h
+++ b/lib/libcxx/include/__algorithm/remove.h
@@ -18,28 +18,29 @@
 #  pragma GCC system_header
 #endif
 
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _ForwardIterator, class _Tp>
 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
-remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value)
-{
-    __first = _VSTD::find(__first, __last, __value);
-    if (__first != __last)
-    {
-        _ForwardIterator __i = __first;
-        while (++__i != __last)
-        {
-            if (!(*__i == __value))
-            {
-                *__first = _VSTD::move(*__i);
-                ++__first;
-            }
-        }
+remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
+  __first = std::find(__first, __last, __value);
+  if (__first != __last) {
+    _ForwardIterator __i = __first;
+    while (++__i != __last) {
+      if (!(*__i == __value)) {
+        *__first = std::move(*__i);
+        ++__first;
+      }
     }
-    return __first;
+  }
+  return __first;
 }
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // _LIBCPP___ALGORITHM_REMOVE_H