--- a/flang/runtime/io-api.cpp
+++ b/flang/runtime/io-api.cpp
@@ -1495,8 +1495,14 @@
 #if defined(_LIBCPP_VERBOSE_ABORT)
 // Provide own definition for `std::__libcpp_verbose_abort` to avoid dependency
 // on the version provided by libc++.
-
-void std::__libcpp_verbose_abort(char const *format, ...) {
+#ifndef _LIBCPP_VERBOSE_ABORT_NOEXCEPT
+#  if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 260000
+#    define _LIBCPP_VERBOSE_ABORT_NOEXCEPT _NOEXCEPT
+#  else
+#    define _LIBCPP_VERBOSE_ABORT_NOEXCEPT
+#  endif
+#endif
+void std::__libcpp_verbose_abort(char const *format, ...) _LIBCPP_VERBOSE_ABORT_NOEXCEPT {
   va_list list;
   va_start(list, format);
   std::vfprintf(stderr, format, list);