Re: Failing to use gnulib bootstrap in libtool

[Jim Meyering]

Gary V. Vaughan wrote:
> 14. Updating
> ============
>
> There's no obvious way for bootstrap to update itself.  Since we got to some 
> lengths to install the `gnulib' subproject that it comes from, it should at 
> least be able to warn that it is out of date even if a self-update is not 
> possible - is it even possible (let alone portable) for a script to copy 
> something over itself while running, and then re-exec to pick up the changes?

Detection would be easy.  Something like this:

    cmp $0 $gnulib_path/$build_aux/bootstrap

A warning would be good, but I would avoid an auto-update.