Clever Geek Handbook

Go does not detect the `sync` package

I get a message error: reference to undefined identifier ‘sync.Pool’

and it works in the Playground. What should I do?

package main

import (
  "fmt"
  "sync"
)

func main() {
  var wg sync.Pool
  fmt.Println(wg)
}
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2 answers


If you installed go from source , check what $GOROOT

et ^ refers to $GOROOT_FINAL

: if they differ, you need to reset your GOROOT

to GOROOT_FINAL

.

The value accepted by the installed binaries and scripts when $GOROOT

not explicitly specified.
The default is $GOROOT

.

If you want to build the Go tree in one location, but move it to a different location after building, set it $GOROOT_FINAL

to a possible location.

From comments the OP points out:

go version

deduces



go version xgcc (Ubuntu 4.9.1-0ubuntu1) 4.9.1 linux/amd64

And $GOROOT/pkg/linux_amd64/sync.a

there is.

I recommended to $PATH

include $GOROOT/bin

JimB add:

to make sure your $PATH

contains $GOROOT/bin

for the correct one GOROOT

. I think you have two settings that make this more confusing.

+1


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You don't have the correct version of Go. sync.Pool

was only added in Go 1.3. Try updating your local go package, make sure you are using 1.3 and try again.



+5


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