[C++] Add cplusplus component

components/cplusplus/crt.cpp

@@ -0,0 +1,27 @@
+#include <rtthread.h>
+#include "crt.h"
+
+void *operator new(size_t size)
+{
+    return rt_malloc(size);
+}
+
+void *operator new[](size_t size)
+{
+    return rt_malloc(size);
+}
+
+void operator delete(void *ptr)
+{
+    rt_free(ptr);
+}
+
+void operator delete[] (void *ptr)
+{
+    return rt_free(ptr);
+}
+
+void __cxa_pure_virtual(void)
+{
+    rt_kprintf("Illegal to call a pure virtual function.\n");
+}