[jdk17u-dev] RFR: 8318696: Do not use LFS64 symbols on Linux [v2]

[Andrew John Hughes]

On Thu, 25 Jul 2024 13:35:14 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Backport 8318696 from jdk21u-dev
>
> Matthias Baesken has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
> 
>  - Merge branch 'master' into backport-MBaesken-2697a9d1
>  - Backport 2697a9d1c288daaddae751a7e8a2d2239c5d884c

Thanks for re-opening this.

Copyright header adaptations look fine. `os::available` was removed by [JDK-8285307](https://bugs.openjdk.org/browse/JDK-8285307) in later JDKs, which is why it isn't in the original patch and needs to be fixed in the backport.

The only change I'm curious about is in `os::current_file_offset` & `os::seek_to_file_offset` as they retain `off64_t` casts. The 21u version uses `off_t`. Was this deliberate or just missed?

Also, I presume we'll also need [JDK-8324753](https://bugs.openjdk.org/browse/JDK-8324753) for AIX as a follow-up?

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PR Review: https://git.openjdk.org/jdk17u-dev/pull/2173#pullrequestreview-2200713263
PR Comment: https://git.openjdk.org/jdk17u-dev/pull/2173#issuecomment-2251774389