cmake not found

[Archcavalier]

I don't know what I'm doing wrong here.

Installed Clang.
clang version 18.1.8
Installed eclipse, did the instal new software, all C/C++ and LLVM programming.
Run the ready-made "hello world" prompt.
Error: build command 'cmake' not found

Also, how do I put the path for LLVM on the GCC?

newbie, sorry for the trouble.