installing fyne package, it fails with `cannot find -lXxf86vm`

Question

i was trying to run the demo code given in https://github.com/fyne-io/fyne

import (
    "fyne.io/fyne/v2/app"
    "fyne.io/fyne/v2/container"
    "fyne.io/fyne/v2/widget"
)

func main() {
    a := app.New()
    w := a.NewWindow("Hello")

    hello := widget.NewLabel("Hello Fyne!")
    w.SetContent(container.NewVBox(
        hello,
        widget.NewButton("Hi!", func() {
            hello.SetText("Welcome :)")
        }),
    ))

    w.ShowAndRun()
}

but it showing this error

go: downloading github.com/stretchr/testify v1.6.1
go: downloading gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c
go: downloading golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4
 github.com/go-gl/glfw/v3.3/glfw
/usr/bin/ld: cannot find -lXxf86vm
collect2: error: ld returned 1 exit status

i am running go version go1.16.7 linux/amd64

Answer 1

I am adding a solution here for Ubuntu 20:04 with golang go1.16.5

I had gcc, I found I needed the following system dependencies sudo apt-get install libglu1-mesa-dev freeglut3-dev mesa-common-dev xorg-dev

my makefile for build

build:
    go mod download
    CGO_ENABLED=1  go build -ldflags "-s -w" -o $(BINARY) 

simple main.go

    import (
      "fyne.io/fyne/v2/app"
    )

    func main() {
      a := app.New()
      w := a.NewWindow("Server Mon")
      w.ShowAndRun()
    }

when I build get a number of missing go dependencies stacktrace like

../../../gopkg/pkg/mod/fyne.io/fyne/[email protected]/storage/repository/parse.go:8:2: missing go.sum entry for module providing package github.com/fredbi/uri (imported by fyne.io/fyne/v2/

theses all resolved with

go get fyne.io/fyne/v2/[email protected]
go get fyne.io/fyne/v2/storage/[email protected]
go get fyne.io/fyne/v2/internal/painter/[email protected]
go get fyne.io/fyne/v2/internal/driver/[email protected]

with above steps everything builds and runs