Go

How to handle syscall functions on a port to z/OS?

Sample code:

package main                                
import "fmt"                                
import "syscall"                            
func main() {                                
                                             
   buff := ݨbyte{0}                        
                                             
   fmt.Println("trying syscall on z/os")    
   syscall.ReadDirent(2,buff)                
}                                            

This builds, but on execution generates: syscall.ReadDirent: not implemented on z/OS

Thanks for the suggestion.
Test code that has:

import "golang.org/x/sys/unix"

unix.ReadDirent(2,buff)

generates: undefined: unix.ReadDirent 

In lpp/IBM/cvg/v1r17/go/src/cmd/vendor/golang.org/x/sys/unix
I find readdirent_getdents.go which looks like a valid implementation of ReadDirent in package unix;  BUT, it  does not have a zos build tag.

In lpp/IBM/cvg/v1r17/go/src/cmd/vendor/golang.org/x/sys/unix 
I cannot see a zos/s390x version of Getdents (used by ReadDirent).

Where do I find and how do I use a zos/s390x version of ReadDirent?