RFR: 8303485: Replacing os.name for operating system customization

[David Holmes]

On Thu, 9 Mar 2023 17:18:35 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> That would not yield a compile time constant.
>> The TARGET_IS_XXX values must evaluate to compile time constants as evaluated by javac.
>
> Using the naming from the build makes it clearer that there is a dependency between the build names and those in the template.

Don't we have a conditional compilation ability with these template files such that we can just generate true or false depending on the OS?

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PR: https://git.openjdk.org/jdk/pull/12931