Sadly, the POSIX specification for "make" is notoriously limited. They only spec'ed what everyone could agree on, and that wasn't much. I'm sure there are cases where a make that <i>only</i> implements the POSIX spec is fine.. and if this is useful, great!! However, many projects that use "make" will outgrow it. I think many people just assume GNU make when they use a make; GNU make has lots of additional capabilities that turn out to be useful, and it runs practically everywhere.<p>Your mileage may vary.
That's pretty neat! But is there a link to the “future POSIX standard”? A few months ago I tried looking for it on <a href="https://pubs.opengroup.org/" rel="nofollow">https://pubs.opengroup.org/</a>, but couldn't.
>This version is also dedicated to the public domain<p>IANAL but under US copyright law this is a meaningless statement as it's not possible to disclaim ownership. You can only permissively license - though reading the LICENSE file, this is what they are doing in practice.