openjdk21-openj9: Minimum OS version is 10.15 but install on older versions, openjdk17-openj9: minimum OS version is 10.14

[sambthompson (Sam Thompson)]

openjdk21-openj9 port installation succeeds on Mojave (and earlier, based on ​Port Health), however the installed file /opt/local/Library/Java/JavaVirtualMachines/jdk-21-ibm-semeru.jdk/Contents/Info.plist in the run-time has:

...
<key>JVMMinimumSystemVersion</key>
		<string>10.15.0</string>
...

This sort-of accords with IBM's ​support documentation, where earliest version supported for openjdk21-openj9 is stated as macOS 11 (and it's the prior LTS version openjdk17-openj9 which has OSX 10.14+ as minimum version).

Should adjust Portfile to exclude OS versions < 10.15, since /usr/libexec/java_home checks the minimum system version and will not report this JDK as present. This issue also affects openjdk17-openj9, where again (according to Port Health), it will install on versions earlier than 10.14, despite the Info.plist setting specifying 10.14

[breun (Nils Breunese)]

Thanks for pointing this out, I'll check JVMMinimumSystemVersion for all JDK ports and update as necessary.

[Nils Breunese <breun@…>]

In 5967ac66666781814fbc3c65499f17e7ff6b4b8f/macports-ports (master):

openjdk21-openj9: update minimum OS version (​https://github.com/macports/macports-ports/pull/26086)

closes #71045

[Nils Breunese <breun@…>]

In 7c92d3f743e37e006c7e4ab4be6f298834be0a97/macports-ports (master):

openjdk17-openj9: update minimum OS version (​https://github.com/macports/macports-ports/pull/26087)

closes #71045

[sambthompson (Sam Thompson)]

Thanks, Nils!