RFR: 8274548: (fc) FileChannel gathering write fails with IOException "Invalid argument" on macOS 11.6 [v6]

[Brian Burkhalter]

On Mon, 11 Oct 2021 16:03:10 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> I'm find with dropping the OS version check on macOS and removing the Darwin version function.
>> 
>> I also noticed the inconsistency in the APPLE and MACOSX symbolic constants. There's also another one like ALL_BSD_SOURCE. I don't know whether we consider that redundant as well.
>
>> I'm find with dropping the OS version check on macOS and removing the Darwin version function.
> 
> I think it will align with the man page and remove any questions as to why this is macOS version specific.
> 
> 
>> I also noticed the inconsistency in the APPLE and MACOSX symbolic constants. There's also another one like ALL_BSD_SOURCE. I don't know whether we consider that redundant as well.
> 
> We can look at this in a separate issue.

... and dropping the OS version check leaves fewer moving parts.

On the conditional compilation symbolic constants I filed JDK-8275070.

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PR: https://git.openjdk.java.net/jdk/pull/5831