libcxxrt: Add a stub implementation of __cxa_call_terminate

This function is called by GCC 14 if a destructor invoked during
exception unwinding throws an exception.

Reviewed by:	emaste
Obtained from:	libcxxrt commit 391a3dcc1054e18c2f0dff4e14d6d79ac95399d7
Differential Revision:	https://reviews.freebsd.org/D46004

contrib/libcxxrt/exception.cc

@@ -1433,6 +1433,19 @@ extern "C" void __cxa_call_unexpected(void*exception)
 	abort();
 }
 
+/**
+ * ABI function, called when an object destructor exits due to an
+ * exception during stack unwinding.
+ *
+ * This function does not return.
+ */
+extern "C" void __cxa_call_terminate(void *exception) throw()
+{
+	std::terminate();
+	// Should not be reached.
+	abort();
+}
+
 /**
  * ABI function, returns the adjusted pointer to the exception object.
  */

lib/libcxxrt/Version.map

@@ -253,6 +253,10 @@ CXXABI_1.3.11 {
     __cxa_init_primary_exception;
 } CXXABI_1.3.9;
 
+CXXABI_1.3.15 {
+    __cxa_call_terminate;
+} CXXABI_1.3.11;
+
 CXXRT_1.0 {
 
     extern "C++" {

lib/libcxxrt/Version.map.arm

@@ -254,6 +254,10 @@ CXXABI_1.3.11 {
     __cxa_init_primary_exception;
 } CXXABI_1.3.9;
 
+CXXABI_1.3.15 {
+    __cxa_call_terminate;
+} CXXABI_1.3.11;
+
 CXXRT_1.0 {
 
     extern "C++" {