@@ -2,14 +2,6 @@

 package copy // import "github.com/docker/docker/daemon/graphdriver/copy"

-/*

-#include <linux/fs.h>

-

-#ifndef FICLONE

-#define FICLONE		_IOW(0x94, 9, int)

-#endif

-*/

-import "C"

 import (

 	"container/list"

 	"fmt"

@@ -50,7 +42,7 @@ func copyRegular(srcPath, dstPath string, fileinfo os.FileInfo, copyWithFileRang

 	defer dstFile.Close()

 	if *copyWithFileClone {

-		_, _, err = unix.Syscall(unix.SYS_IOCTL, dstFile.Fd(), C.FICLONE, srcFile.Fd())

+		err = fiClone(srcFile, dstFile)

 		if err == nil {

 			return nil

 		}

new file mode 100644

@@ -0,0 +1,22 @@

+// +build linux,cgo

+

+package copy // import "github.com/docker/docker/daemon/graphdriver/copy"

+

+/*

+#include <linux/fs.h>

+

+#ifndef FICLONE

+#define FICLONE		_IOW(0x94, 9, int)

+#endif

+*/

+import "C"

+import (

+	"os"

+

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

+)

+

+func fiClone(srcFile, dstFile *os.File) error {

+	_, _, err := unix.Syscall(unix.SYS_IOCTL, dstFile.Fd(), C.FICLONE, srcFile.Fd())

+	return err

+}

new file mode 100644

@@ -0,0 +1,13 @@

+// +build linux,!cgo

+

+package copy // import "github.com/docker/docker/daemon/graphdriver/copy"

+

+import (

+	"os"

+

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

+)

+

+func fiClone(srcFile, dstFile *os.File) error {

+	return unix.ENOSYS

+}