RFR: JDK-8243109: Bootcycle build failures after Nashorn removal

[Magnus Ihse Bursie]

On 2020-04-21 00:29, Erik Joelsson wrote:
> With Nashorn removed, the bootcycle build is now broken for builds 
> that process markdown files for docs or man pages. Same goes for 
> building with with a recent enough JDK 15 as your bootjdk. While a 
> long term solution is being worked on, we need something to keep our 
> CI builds from failing. For now that would simply be disabling these 
> parts of the build if a jjs launcher cannot be found in the boot jdk.
>
> This patch checks the bootjdk for jjs. If not found, ENABLE_PANDOC is 
> set to false. This will in turn prevent full docs from being enabled. 
> For local bootcycle builds, I explicitly disable pandoc in 
> bootcycle-spec.gmk.in. For the jib profile 
> linux-x64-bootcycle-prebuilt, the "--enable-full-docs" configure arg 
> is inherited from the main profile, so needed to neutralize that with 
> an override.
>
> I had to reorder a little bit in configure.ac to have the bootjdk 
> setup when processing JDK options.
>
> Webrev: http://cr.openjdk.java.net/~erikj/8243109/webrev.01/index.html
Thanks for taking on this! LGTM.

For the long term solution, I still have a half-finished rewrite of the 
javascript filters in Java locally. I didn't realize it could have been 
needed prior to the Nashorn removal due to the bootcycle builds, 
otherwise I would have prioritized this.

/Magnus
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8243109
>
> /Erik
>