[Octave-patch-tracker] [patch #9806] Build failures on macOS via Homebrew due to 1.6 argument to -source and -target

[Andrew Janke]

Follow-up Comment #2, patch #9806 (project octave):

This is probably dependent on which version of the JDK you are building
against, and not which macOS version or OpenJDK vs Oracle JDK. Every so often,
newer versions of the JDK drop support for older Java source and bytecode
formats. Looks like JDK 12 has dropped support for the Java 1.6 format.

Java 1.6 is pretty ancient at this point. Given that Octave requires
somewhat-new versions of other libraries, it seems to me like it would be
reasonable to just bump the Java compilation level to 1.7.

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