How to confirm a function is NOT compiled into a go binary

[worths...@gmail.com]

I'm looking for some type of tool or method to examine a compiled go binary and confirm that a list of functions is NOT included in the compiled binary.

example:

package internal

func A() string {
  return "func A"
}

func B() string {
  return "func B"
}

func C() string {
  return "func C"
}

package main

import "fmt"
import "internal"

func main() {
    fmt.Println(internal.A())
}

If the above were a compiled binary, I would like to use a tool or method to confirm that B() and C() is NOT included in the compiled binary.

Thanks...

[Andrew Klager]

Take a look at  https://golang.org/cmd/nm/

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[Robert Engels]

Since Go effectively requires source code for compilation, I think what you’re asking for is impossible as the dev can just copy the source under a different function name, including most stdlib code. 

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[Wagner Riffel]

This is totally possible, you can either use 'go tool nm' as suggest,
or 'go tool objdump', both tools can answer this question.
go tool objdump -s 'pkgname/internal' a.out
go tool nm a.out | grep 'pkgname/internal'
Be aware that testing against the shown examples, neither A() will be
present, by default go compiler will do inlining, you might want to
use //go:noinline directive.

BR.