RFR: JDK-8260518: Change default -mmacosx-version-min to 10.12 [v2]

[Sergey Bylokhov]

On Thu, 28 Jan 2021 16:08:53 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

>> To guarantee backwards compatible binaries on Macos, we use the option -mmacosx-version-min. This is currently set to 10.9, which is a really ancient version. I propose we bump this to 10.12, which is still a rather conservative old version (support ended in 2019).
>> 
>> The driving issue for bumping this now is the aarch64 port, where building for aarch64 requires the version min to be set to 11.0. Having a large gap between the target versions becomes problematic as we hit a lot of deprecation warnings in shared code. To be able to fix these deprecation warnings, we need a smaller version gap.
>> 
>> Just bumping us to 10.12 triggers warnings in libsplashscreen, so I will temporarily add "deprecated-declarations" to the list of disabled warnings there until they can be fixed in JDK-8260402.
>
> Erik Joelsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Copyright year

Marked as reviewed by serb (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk/pull/2268