From 000101de4219cf1c8702b681e4a86f09941cfb38 Mon Sep 17 00:00:00 2001
From: riidefi <34194588+riidefi@users.noreply.github.com>
Date: Sat, 11 Feb 2023 16:10:28 -0700
Subject: [PATCH] C++: Automatically use `RUST_CXX_NO_EXCEPTIONS` panic backend
 if the compiler does not support exceptions.

---
 src/cxx.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/cxx.cc b/src/cxx.cc
index 4958eb08b..b15c80ea6 100644
--- a/src/cxx.cc
+++ b/src/cxx.cc
@@ -75,7 +75,9 @@ inline namespace cxxbridge1 {
 
 template <typename Exception>
 void panic [[noreturn]] (const char *msg) {
-#if defined(RUST_CXX_NO_EXCEPTIONS)
+// Do not attempt to throw if the compiler explicitly does not support it.
+// If __cpp_attributes is not set, the compiler may not implement feature-test macros.
+#if defined(RUST_CXX_NO_EXCEPTIONS) || (defined(__cpp_attributes) && !defined(__cpp_exceptions))
   std::cerr << "Error: " << msg << ". Aborting." << std::endl;
   std::terminate();
 #else