RFR: 8310183: Update GitHub Actions to use boot JDK for building jtreg

Sat Jun 17 01:40:30 UTC 2023

On Fri, 16 Jun 2023 14:51:21 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> To those investigating the msys issue, do we know why and where `CLASSPATH` is being used? In general, that's a deprecated style of use.

The make files in jtreg build have a bunch of `CLASSPATH` usages while launching `javac`. For example here:

https://github.com/openjdk/jtreg/blob/master/make/jtreg.gmk#L46
https://github.com/openjdk/jtreg/blob/master/make/jtdiff.gmk#L36

I'll experiment today to move away from `CLASSPATH` environment variable and use javac's classpath option instead.

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PR Comment: https://git.openjdk.org/jdk/pull/14507#issuecomment-1595570158