RFR: 8332808: Always set java.io.tmpdir to a suitable value in the build

[Magnus Ihse Bursie]

On Thu, 23 May 2024 10:27:47 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> We should pass a good value for java.io.tmpdir to all java invocations in the build, that redirect any temporary files to somewhere under the build directory.
> 
> This bug was created as a result of the discussion regarding [JDK-8331348](https://bugs.openjdk.org/browse/JDK-8331348).

And yes, the way we build up our java/javac command lines is really messy and need an overhaul. I'll come to it, at some point, I hope...

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PR Comment: https://git.openjdk.org/jdk/pull/19362#issuecomment-2126765313