go - How to remove unused code at compile time?

Question

We've built a Go package that is used by many of us.

It's imported using the standard import ("package-name") method.

At compile time though, all of our utilities, including the very small ones, end up as very large binaries.

We've extracted all the strings in the utilities and discovered that the entire package is being compiled into each and every utility. Including functions that are not being used by those utilities.

EDIT 1:

Thank you to the people who are responding to this question.

Here's what we are seeing:

main.go

package main

import "play/subplay"

func main() {
    subplay.A()
}

play/subplay.go

package subplay

func A() {
    fmt.Printf("this is function A()")
}

func B() {
    fmt.Printf("secret string")
}

Function B() is never called. Yet, after building the binary, we find the string "secret string" into main.exe.

How can we remove unused code from Go programs at compile time?

Answer 1

Waitting for answers