Enable SO_REUSEPORT on OSes that support it.

[SAROJJV]

Build fails on windows platforms as set_reuse_port() is not supported on windows platforms. With this change part of the code using set_reuse_port() will only be compiled on Linux & MacOs platforms.

[linux-foundation-easycla]

• ❌ - login: @sarojcare / name: Saroj Kumar Patra. The commit (70b9aa0) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

[cijothomas]

#1578 would help such issues from occurring in the future!

[cijothomas]

• ❌ - login: @sarojcare / name: Saroj Kumar Patra . The commit (70b9aa0) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

@SAROJJV Clearing the EasyCLA is a mandatory pre-requisite before accepting any contributions. It is a one-time process.

[lalitb]

I believe it would make sense to have this PR with the CI build for Windows - else there is no way to validate the changes.

[SAROJJV]

• ❌ - login: @sarojcare / name: Saroj Kumar Patra . The commit (70b9aa0) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

@SAROJJV Clearing the EasyCLA is a mandatory pre-requisite before accepting any contributions. It is a one-time process.

I have already signed it. Not sure why it is yet getting flaged.

[jmacd]

I believe it would make sense to have this PR with the CI build for Windows - else there is no way to validate the changes.

What will that require? I know it's possible, the Collector has Windows in its CI/CD. I think we should do that; I don't think we should block this PR necessarily.

[cijothomas]

I believe it would make sense to have this PR with the CI build for Windows - else there is no way to validate the changes.

What will that require? I know it's possible, the Collector has Windows in its CI/CD. I think we should do that; I don't think we should block this PR necessarily.

No need to block this PR on lack of windows ci. #1578 is something I plan to fix today :)

[lalitb]

Not blocking the PR, but good to add a TODO comment that load-balancing is broken for windows, and this needs to be evaluated.

[cijothomas]

https://github.com/open-telemetry/otel-arrow/actions/runs/20142815332/job/57814915753?pr=1592 We fail on windows precisely due to this! So it confirms windows tests are working 🤣