Cannot find package “internal/cpu” error in GO

Question

Go as an internal package internal/cpu that exposes all the necessary functions to detect flavors of SIMD. See an example of use in the bytes package .

I'm trying to get capability flags variables from internal/cpu package but when i'm trying to execute go build, i'm getting following error: cannot find package "internal/cpu

import (
    "fmt"
    "internal/cpu"
)

func main() {
    if cpu.X86.HasAVX2 {
        fmt.Println("AVX2 SIMD instructions available")
    }
}

What i did wrong?

Answer 1

You will not be able to import internal/cpu due to this rule:

Code in or below a directory named "internal" is importable only by code in the directory tree rooted at the parent of "internal".

https://golang.org/cmd/go/#hdr-Internal_Directories

You can copy out the parts of the code you need, just make sure to follow the LICENSE, which is fairly open:

https://golang.org/LICENSE