在linux下用c声明大小为2字节的字符

I am studying about unicode support. I am working on linux. I know there is build-in datatype wchar_t in c which declares character of size 4 bytes under linux. But what is way to declare character of byte 2? C++11 introduces char16_t to declare character with size 2 byte, is there no build in datatype in c to achieve this?I am studying about unicode support. I am worki