[utestcases] add cpp11 base testcase.

examples/utest/configs/cpp11/cpp11.conf

@@ -0,0 +1,4 @@
+CONFIG_UTEST_CPP11_THREAD_TC=y
+# dependencies
+CONFIG_RT_USING_CPLUSPLUS=y
+CONFIG_RT_USING_CPLUSPLUS11=y

examples/utest/testcases/Kconfig

@@ -9,6 +9,7 @@ if RT_USING_UTESTCASES
 
 source "$RTT_DIR/examples/utest/testcases/utest/Kconfig"
 source "$RTT_DIR/examples/utest/testcases/kernel/Kconfig"
+source "$RTT_DIR/examples/utest/testcases/cpp11/Kconfig"
 source "$RTT_DIR/examples/utest/testcases/drivers/serial_v2/Kconfig"
 
 endif

examples/utest/testcases/cpp11/Kconfig

@@ -0,0 +1,7 @@
+menu "CPP11 Testcase"
+
+config UTEST_CPP11_THREAD_TC
+    bool "Cpp11 thread test"
+    default n
+
+endmenu

examples/utest/testcases/cpp11/SConscript

@@ -0,0 +1,13 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Split('''
+thread_tc.cpp
+''')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('utestcases', src, depend = ['UTEST_CPP11_THREAD_TC'], CPPPATH = CPPPATH)
+
+Return('group')

examples/utest/testcases/cpp11/thread_tc.cpp

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2006-2019, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-09-03     liukang      the first version
+ */
+
+#include <rtthread.h>
+#include "utest.h"
+#include <thread>
+
+static void test_thread(void)
+{
+    int count = 0;
+    auto func = [&]() mutable
+    {
+        for (int i = 0; i < 100; ++i)
+        {
+            ++count;
+        }
+    };
+
+    std::thread t1(func);
+    t1.join();
+
+    if (count != 100)
+    {
+        uassert_false(1);
+    }
+
+    uassert_true(1);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_thread);
+}
+UTEST_TC_EXPORT(testcase, "testcases.cpp11.thread_tc", utest_tc_init, utest_tc_cleanup, 10);