[go-nuts] How do i get the information of operating system if its 32bit or 64-bit

On Mon, Jan 27, 2014 at 9:36 AM, SProgrammer wrote:
How do i detect if its Windows or Linux or Mac then is it 32-bit or 64-bit?
I only getting the OS name

code:
package main

//import "os/exec"
//import "syscall"
import "runtime"
import "fmt"

func main() {

fmt.Println(runtime.GOOS) // windows

/*
cmd := exec.Command(cmd, arg)
err := cmd.Start()
if err != nil {
println("Failed", err)
}
*/

}

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On 01/27/2014 05:00 PM, Dmitry Vyukov wrote:
There is also runtime.GOARCH
If you are interested only in bitness, then you can use unsafe.Sizeof(uintptr)

On Mon, Jan 27, 2014 at 12:50 PM, Martin Schnabel wrote:
or you can do it without package unsafe:

const wordsize = 32 << (^uint(0) >> 32 & 1)

http://play.golang.org/p/aJ9384H4Yg

On Mon, Jan 27, 2014 at 9:25 PM, Brad Fitzpatrick wrote:
It's correct. Native Client's pointers are 32-bits, even if the
instruction set is amd64.


http://www.chromium.org/nativeclient/design-documents/native-client-application-binary-interface/data-representation

On Mon, Jan 27, 2014 at 11:00 AM, Dmitry Vyukov wrote:

There is also runtime.GOARCH
If you are interested only in bitness, then you can use
unsafe.Sizeof(uintptr)