garble build
exec ./main
cmp stdout main.stdout
binsubstr main$exe 'privateAdd' 'PublicAdd'

[short] stop # no need to verify this with -short

go build
exec ./main
cmp stdout main.stdout

-- go.mod --
module foo.com/main
-- main.go --
package main

import (
	"fmt"

	"foo.com/main/imported"
)

func privateAdd(x, y int64) int64

func main() {
	fmt.Println(privateAdd(1, 2))
	fmt.Println(imported.PublicAdd(3, 4))
}
-- main.s --
TEXT ·privateAdd(SB),$0-24
	MOVQ x+0(FP), BX
	MOVQ y+8(FP), BP
	ADDQ BP, BX
	MOVQ BX, ret+16(FP)
	RET
-- imported/imported.go --
package imported

func PublicAdd(x, y int64) int64
-- imported/imported.s --
TEXT ·PublicAdd(SB),$0-24
	MOVQ x+0(FP), BX
	MOVQ y+8(FP), BP
	ADDQ BP, BX
	MOVQ BX, ret+16(FP)
	RET
-- main.stdout --
3
7