[jdk25u] RFR: 8345810: Custom launchers must be linked with pthread to avoid dynamic linker issues

[Aleksey Shipilev]

On Wed, 1 Oct 2025 12:52:58 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Improves jpackage and test reliability, especially with older glibc-s that have `dlerror` issues under concurrent access.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, observing the failure with GCC 7.3.1
>  - [x] Linux x86_64 server fastdebug, `sun/management/jmxremote`, 20x, no failures
>  - [x] Linux x86_64 server fastdebug, `tools/jpackage`, 5x, no failures
>  - [x] Linux x86_64 server fastdebug, `jdk_all`, no failures

Push approval granted.

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PR Comment: https://git.openjdk.org/jdk25u/pull/257#issuecomment-3372243924