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, 10 insertions, 17 deletions

diff --git a/lib/libcxx/include/__memory/uses_allocator.h b/lib/libcxx/include/__memory/uses_allocator.h
index f82ac17963..84310c3fa5 100644
--- a/lib/libcxx/include/__memory/uses_allocator.h
+++ b/lib/libcxx/include/__memory/uses_allocator.h
@@ -21,33 +21,26 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _Tp>
-struct __has_allocator_type
-{
+struct __has_allocator_type {
 private:
-    template <class _Up> static false_type __test(...);
-    template <class _Up> static true_type __test(typename _Up::allocator_type* = 0);
+  template <class _Up>
+  static false_type __test(...);
+  template <class _Up>
+  static true_type __test(typename _Up::allocator_type* = 0);
+
 public:
-    static const bool value = decltype(__test<_Tp>(0))::value;
+  static const bool value = decltype(__test<_Tp>(0))::value;
 };
 
 template <class _Tp, class _Alloc, bool = __has_allocator_type<_Tp>::value>
-struct __uses_allocator
-    : public integral_constant<bool,
-        is_convertible<_Alloc, typename _Tp::allocator_type>::value>
-{
+struct __uses_allocator : public integral_constant<bool, is_convertible<_Alloc, typename _Tp::allocator_type>::value> {
 };
 
 template <class _Tp, class _Alloc>
-struct __uses_allocator<_Tp, _Alloc, false>
-    : public false_type
-{
-};
+struct __uses_allocator<_Tp, _Alloc, false> : public false_type {};
 
 template <class _Tp, class _Alloc>
-struct _LIBCPP_TEMPLATE_VIS uses_allocator
-    : public __uses_allocator<_Tp, _Alloc>
-{
-};
+struct _LIBCPP_TEMPLATE_VIS uses_allocator : public __uses_allocator<_Tp, _Alloc> {};
 
 #if _LIBCPP_STD_VER >= 17
 template <class _Tp, class _Alloc>