JDK-8282532

[Magnus Ihse Bursie]

Hi Julian,

Thanks for bringing this back in a discussion format. If I understand 
your problem correctly, it is that the --openjdk-target fully replaces 
the autoconf --build/--host/--target triplet, and assumes that it can 
autodetect the build platform. And if that autodetect fails, the only 
resort is to use the full autoconf triplet.

The problem with the autoconf triplet is with how they use "host" and 
"target". The "build" part is the same as we use it, namely the platform 
used to create the build.

So if we want to override the build platform, it should be as simple as 
setting the --build option to autoconf. That means that the configure 
wrapper will need to detect if --build is set, and only use our own 
autodetect if it is not, and change the test for conflicting options to 
only check host/target at the same time as --openjdk-target.

Finally documentation and error messages in the configure wrapper needs 
to be adapted.

Also, the order of configure command options do not matter.

/Magnus

On 2022-03-02 13:28, Jules W. wrote:
> Apologies for not creating a thread consulting the mailing list before
> submitting the PR, I'm still getting used to the process (And also thought
> this would create unnecessary noise for people within this list).
>
> I initially believed that given how the legacy options had warnings when
> they were set, and how they were discouraged in many areas, that they were
> eventually to be removed, but that assumption I made appears to be wrong.
>
> I was more concerned about how easy it was to understand what the
> option did than the name conformation, --current-platform was the best one
> i could come up with so far; --openjdk-build sounded slightly less clear to
> me when i was coming up with the name. That aside, I'm not sure if keeping
> the old autoconf --build option is possible, since it seems that
> --openjdk-target formats --build, --host and --target in a specific order,
> and whether using the existing --build option would affect it in any way,
> since that would mean --build is now behind --host and --target (Given how
> --openjdk-target works, from what I can tell).
>
> I haven't changed the html version of the documentation yet as I haven't
> really finished making changes to the markdown version, I do apologize for
> the formatting errors though.
>
>
> best regards,
>
> Julian