RFR: 8313374: --enable-ccache's CCACHE_BASEDIR breaks builds [v4]

[David Holmes]

On Mon, 31 Jul 2023 07:00:00 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

>> https://bugs.openjdk.org/browse/JDK-8313374
>> --enable-ccache's CCACHE_BASEDIR breaks builds
>
> Jan Kratochvil has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adjust compatibility with FILE_MACRO_CFLAGS.

That certainly looks much clearer in terms of what is being done and why - thanks. Now just need someone with ccache experience to validate the actual fix.

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PR Review: https://git.openjdk.org/jdk/pull/15080#pullrequestreview-1554107628