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

[erik.joelsson at oracle.com]

On 2021-01-27 19:57, Sergey Bylokhov wrote:
> On Wed, 27 Jan 2021 20:43:44 GMT, Phil Race <prr 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.
>> Marked as reviewed by prr (Reviewer).
> Will this affect the minimum version of macOS which will be able to run on? don't we need a CSR(not sure)?

Yes it will and no, as far as I'm aware, we don't need anything like 
that. For Oracle, the support matrix for JDK 16 was 10.13+. The problem 
would be if some other OpenJDK distributor wanted to keep supporting 
something older.

/Erik