[update] support armclang and c++11.

1 files changed, 22 insertions, 0 deletions

diff --git a/components/cplusplus/cpp11/armclang/miscellaneous.cpp b/components/cplusplus/cpp11/armclang/miscellaneous.cpp
new file mode 100644
index 0000000000..a084eda8c8
--- /dev/null
+++ b/components/cplusplus/cpp11/armclang/miscellaneous.cpp
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-04-27     flybreak     the first version.
+ */
+
+#include <arm-tpl.h>
+
+extern "C" int __ARM_TPL_execute_once(__ARM_TPL_exec_once_flag *__flag,
+                                      void (*__init_routine)(void))
+{
+    if (*__flag == 0)
+    {
+        __init_routine();
+        *__flag = 1;
+    }
+    return 0;
+}