RFR: 8257620: Do not use objc_msgSend_stret to get macOS version

Wed Dec 2 21:59:55 UTC 2020

On Wed, 2 Dec 2020 21:32:46 GMT, Anton Kozlov <akozlov at openjdk.org> wrote:

>> I wonder if we should be "upping" that to something later.
>> 10.9 is over 7 years old and has been out of support for what - 4 years ?
>
> Interesting, I still able to run the build after this change on macOS 10.9.5. I use jdk image and there is no LC_VERSION_MIN_MACOSX in libjvm. libjli, libjava have one, and it's 10.9

The current intention is to be consistent with the min system version and it's currently set to 10.9. If libjvm.dylib gets a different value, then that would be a bug, but note that this could also vary depending on how the build is configured and the compiler version used.

So far, I have only bumped this version once, and that was because the toolchain required it when switching to Clang from GCC. Keeping it low is nice for backwards compatibility. That said, I don't see a problem with increasing this value to 10.10 if it's needed for something. Even 10.10 was EOL a long time ago now. The current value is set in make/autoconf/flags.m4.

The discrepancy in Info.plist was fixed in JDK-8252145.

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PR: https://git.openjdk.java.net/jdk/pull/1569