RFR: 8323667: Library debug files contain non-reproducible full gcc include paths [v4]

[Erik Joelsson]

On Tue, 16 Jan 2024 14:12:43 GMT, Andrew Leonard <aleonard at openjdk.org> wrote:

>> For gcc toolchains in ALLOW_ABSOLUTE_PATHS_IN_OUTPUT=False builds, this PR finds the location of the gcc system include paths, and adds -fdebug-prefix-map flags to map them to a standard location. Thus making the debuginfo and resulting libraries reproducible when using DevKits in different path locations.
>
> Andrew Leonard has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8323667: Library debug files contain non-reproducible full gcc include paths
>   
>   Signed-off-by: Andrew Leonard <anleonar at redhat.com>

I think this looks ok but could you split the longer lines to make side by side comparisons easier in the future?

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PR Review: https://git.openjdk.org/jdk/pull/17399#pullrequestreview-1824910606