add windows stub

Signed-off-by: leongross <[email protected]>

Author: leongross

src/os/file_windows.go

@@ -59,6 +59,10 @@ func Pipe() (r *File, w *File, err error) {
 	return
 }
 
+func (f *unixFileHandle) Truncate(size int64) error {
+	return ErrNotImplemented
+}
+
 func tempDir() string {
 	n := uint32(syscall.MAX_PATH)
 	for {
@@ -106,6 +110,10 @@ func (f unixFileHandle) Sync() error {
 	return ErrNotImplemented
 }
 
+func (f *File) Truncate(size int64) error {
+	return ErrNotImplemented
+}
+
 // isWindowsNulName reports whether name is os.DevNull ('NUL') on Windows.
 // True is returned if name is 'NUL' whatever the case.
 func isWindowsNulName(name string) bool {

src/syscall/syscall_libc.go

@@ -410,6 +410,3 @@ func libc_unlink(pathname *byte) int32
 //
 //export truncate
 func libc_truncate(path *byte, length int64) int32
-
-//go:extern environ
-var libc_environ *unsafe.Pointer