RFR: 8313374: --enable-ccache's CCACHE_BASEDIR breaks builds [v6]

[Kim Barrett]

On Wed, 9 Aug 2023 12:36:59 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:
> 
>   Use true/false for REWRITE_PATHS_RELATIVE and initialize it
>    - suggested by Erik Joelsson

I don't understand what problem this PR is fixing.  I see assertions from the
PR author that using ccache is broken with OpenJDK, or it breaks dependencies,
or something.  Yet I've been using ccache for years for my local development
builds, and have not encountered any problems, only build time improvements.

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PR Comment: https://git.openjdk.org/jdk/pull/15080#issuecomment-1676150902