Make #4278 buildable on Mac OS X

pkg/system/stat_unsupported.go

@@ -4,10 +4,10 @@ package system
 
 import "syscall"
 
-func getLastAccess(stat *syscall.Stat_t) syscall.Timespec {
+func GetLastAccess(stat *syscall.Stat_t) syscall.Timespec {
 	return stat.Atimespec
 }
 
-func getLastModification(stat *syscall.Stat_t) syscall.Timespec {
+func GetLastModification(stat *syscall.Stat_t) syscall.Timespec {
 	return stat.Mtimespec
 }

pkg/system/system.go

@@ -0,0 +1,7 @@
+package system
+
+import "errors"
+
+var (
+	ErrNotImplemented = errors.New("not implemented")
+)

pkg/system/utimes_unsupported.go

@@ -4,6 +4,9 @@ package system
 
 import "syscall"
 
+// to avoid "imported and not used" error
+var _ = syscall.Open
+
 func LUtimesNano(path string, ts []syscall.Timespec) error {
 	return ErrNotImplemented
 }

pkg/system/xattrs_unsupported.go

@@ -2,8 +2,6 @@
 
 package system
 
-import "syscall"
-
 func Lgetxattr(path string, attr string) ([]byte, error) {
 	return nil, ErrNotImplemented
 }