The `tar xf` option does not preserve the executable bit for a file.
On Unixy systems (linux, macosx), given the command: cmake -E tar xf myarchive.zip
, executable files in the archive are not extracted with the executable bit set.
On Unixy systems (linux, macosx), given the command: cmake -E tar xf myarchive.zip
, executable files in the archive are not extracted with the executable bit set.