tcp_test.diff

diff --git a/core/include/rmutex.h b/core/include/rmutex.h
index 77553fb40..59f4bff40 100644
--- a/core/include/rmutex.h
+++ b/core/include/rmutex.h
@@ -24,7 +24,12 @@
 #define RMUTEX_H
 
 #include <stdint.h>
+#ifdef __cplusplus
+#include <atomic>
+using namespace std;
+#else
 #include <stdatomic.h>
+#endif
 
 #include "mutex.h"
 #include "kernel_types.h"
@@ -59,8 +64,18 @@ typedef struct rmutex_t {
      * @internal
      */
     atomic_int_least16_t owner;
+
+#ifdef __cplusplus
+    rmutex_t& operator=(const rmutex_t& other){
+        mutex = other.mutex;
+        refcount = other.refcount;
+        atomic_store(&owner,atomic_load(&other.owner));
+        return *this;
+    }
+#endif
 } rmutex_t;
 
+
 /**
  * @brief Static initializer for rmutex_t.
  * @details This initializer is preferable to rmutex_init().
diff --git a/tests/gnrc_tcp_client/main.c b/tests/gnrc_tcp_client/main.cpp
similarity index 96%
rename from tests/gnrc_tcp_client/main.c
rename to tests/gnrc_tcp_client/main.cpp
index 4d4d68d5a..ab0440541 100644
--- a/tests/gnrc_tcp_client/main.c
+++ b/tests/gnrc_tcp_client/main.cpp
@@ -42,6 +42,10 @@ uint8_t stacks[CONNS][THREAD_STACKSIZE_DEFAULT + THREAD_EXTRA_STACKSIZE_PRINTF];
 
 void *cli_thread(void *arg);
 
+class ClassToTestCpp{
+    ClassToTestCpp() = default;
+};
+
 int main(void)
 {
     gnrc_netif_t *netif;
@@ -229,9 +233,9 @@ void *cli_thread(void *arg)
         if (ret >= 0) {
             cycles_ok += 1;
         }
-        printf("TID=%d : %"PRIi32" test cycles completed. %"PRIi32" ok, %"PRIi32" faulty",
+        printf("TID=%d : %" PRIi32 " test cycles completed. %" PRIi32 " ok, %" PRIi32 " faulty",
                tid, cycles, cycles_ok, cycles - cycles_ok);
-        printf(", %"PRIi32" failed payload verifications\n", failed_payload_verifications);
+        printf(", %" PRIi32 " failed payload verifications\n", failed_payload_verifications);
     }
     printf("client thread terminating: TID=%d\n", tid);
     return 0;