Is “gcc” on macOS actually “clang”? [duplicate]

Does macOS have clang and gcc at the same time, but they are actually the same thing?

When I ran the following command：

gcc -v

I discovered that "gcc" is actually "clang", as shown in the screenshot here：

enter image description here

I then found two files on my MacBook: /usr/bin/gcc and /usr/bin/clang. They appear to be separate files rather than symbolic links, but I suspect they have the same content, as shown in the screenshot here:

enter image description here

It seems like the file /usr/bin/clang was copied and then renamed to gcc.

What's going on here?