RFR: JDK-8196356: Changes to m4 files don't trigger autoconf execution at build time

[Alan Bateman]

On 08/02/2018 17:49, Erik Joelsson wrote:
> The check for when to generate the generated configure script is not 
> working quite as expected. It currently only compares timestamps if 
> the local repository has any local changes in the make/autoconf 
> directory. This used to make sense when we had a committed generated 
> script, but now we actually do need to regenerate any time an input 
> file is newer than the generated script.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8196356
In addition to `hg status` showing no changes, I think it will continue 
to confuse people to generate it into a hidden directory. Was there any 
consideration to generating into a regular directory?

-Alan