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, 7 insertions, 5 deletions

diff --git a/lib/libcxx/src/filesystem/filesystem_error.cpp b/lib/libcxx/src/filesystem/filesystem_error.cpp
index 5faed3b89e..456b902c33 100644
--- a/lib/libcxx/src/filesystem/filesystem_error.cpp
+++ b/lib/libcxx/src/filesystem/filesystem_error.cpp
@@ -19,16 +19,18 @@ filesystem_error::~filesystem_error() {}
 
 void filesystem_error::__create_what(int __num_paths) {
   const char* derived_what = system_error::what();
-  __storage_->__what_ = [&]() -> string {
+  __storage_->__what_      = [&]() -> string {
     switch (__num_paths) {
     case 0:
       return detail::format_string("filesystem error: %s", derived_what);
     case 1:
-      return detail::format_string("filesystem error: %s [" PATH_CSTR_FMT "]",
-                                   derived_what, path1().c_str());
+      return detail::format_string("filesystem error: %s [" PATH_CSTR_FMT "]", derived_what, path1().c_str());
     case 2:
-      return detail::format_string("filesystem error: %s [" PATH_CSTR_FMT "] [" PATH_CSTR_FMT "]",
-                                   derived_what, path1().c_str(), path2().c_str());
+      return detail::format_string(
+          "filesystem error: %s [" PATH_CSTR_FMT "] [" PATH_CSTR_FMT "]",
+          derived_what,
+          path1().c_str(),
+          path2().c_str());
     }
     __libcpp_unreachable();
   }();