How to ignore gotvm when building ARM64 binary

I want to build my Go repo such that it ignores myrepo/gotvm/* when GOARCH=arm64 and builds the full repo in any other case.

The project folder structure is as follows:

└── myrepo
    ├── go.mod
    ├── main.go
    ├── gotvm
    │   ├── array.go
    │   ├── device.go
    │   └── gotvm.go
    └── otherstuff
        └── otherstuff.go

When building on AMD64 everything works fine:
GOOS=linux GOARCH=amd64 go build -o amdbuild main.go

Building on ARM64
GOOS=linux GOARCH=arm64 go build -o armbuild main.go
gives the following error before not creating the binary:

package command-line-arguments
    imports github.com/myrepo/gotvm: build constraints exclude all Go files in /HOMEDIR/myrepo/gotvm

This is also the case when I add the following lines to the top of each file with package gotvm (array.go, device.go, gotvm.go):

//go:build amd64
// +build amd64`

Other steps I have tried:

• go clean -modcache
• Adding the following build flags (seperately) above all files which are part of the package gotvm

// go:build (darwin && cgo) || (linux && cgo)
//go:build amd64
// +build amd64`

There's a similar question on here: (Mock packages)
, but this ignores the entire folder. I want to ignore the folder conditional on ARCH not being arm64.

TL;DR; Is there any way to cross-compile my repo to both ARM64 and AMD64? I want to ignore TVM for my ARM64 build.

Specs:

• Go version: go1.20.4 linux/amd64
• System: Ubuntu 20.04.5 LTS

Adding a go file with only the package clause into the gotvm folder could workaround the issue. For example, a doc.go file:

// This file is a workaround for the following issue when built with GOARCH=arm64:
//
//   build constraints exclude all Go files in /HOMEDIR/myrepo/gotvm

package gotvm

But when you encounter this issue, most of the time, it means that there is at least one file importing this package and this file is not excluded for GOARCH=arm64. Maybe you should remove the import from this file instead (or exclude this file too for GOARCH=arm64).

I will add a demo to illustrate the issue. These are the files:

├── go.mod
├── gotvm
│   └── gotvm.go
└── main.go

go.mod:

module example.com/m

go 1.20

gotvm/gotvm.go:

//go:build amd64

package gotvm

import "fmt"

func F() {
	fmt.Println("do awesome things using amd64")
}

main.go:

package main

import (
	"fmt"

	_ "example.com/m/gotvm"
)

func main() {
	fmt.Println("Hello world!")
}

For this demo, either remove _ "example.com/m/gotvm" from main.go or add a doc.go file mentioned before will fix the issue. In my opinion, it's better to remove _ "example.com/m/gotvm" from main.go.