Add comment for get_environ_ptr why this API is in stdlib.h

diff --git a/os/include/stdlib.h b/os/include/stdlib.h
index daece9c..bdfb58d 100644 (file)
--- a/os/include/stdlib.h
+++ b/os/include/stdlib.h
@@ -190,6 +190,8 @@ int rand(void);
 /**
  * @ingroup STDLIB_LIBC
  * @brief Return a pointer to the thread specific environ variable
+ * @details This API is not a standard API. But another APIs which are related to ENV are in Stdlib,
+ *         so this API is in Stdlib for ease.
  * @param[in] A pointer to notify a size of environ variable
  * @return A pointer to the current thread environ variable
  * @since Tizen RT v1.0