Fix DateTime constructor default argument handling for macOS

[ALor79]

Although it is better to completely move the default arguments to header files as suggestted by tomas789 due to the more aggressive nature of CMake on mac. this could be an alternative that allows mac users with intel cores to already start using this library.

[mikroskeem]

This also fixes building on Apple Silicon Macs.

[m-unkel]

Thanks a lot for reporting this and for taking the time to investigate 👍

You’re absolutely right — this turned out to be a bug on our side, not an Apple-related issue.

I’ve pushed a fix 3c7d7f0 to address the problem. It’s admittedly a bit odd that this only surfaced on macOS and not on Linux or Windows, especially since the class in question isn’t even used in v2 and is scheduled to be completely rewritten in v3.

That said, it definitely shouldn’t have been a compilation blocker, so thanks again for catching it.

Please pull the latest changes and let me know if you’re still seeing any issues.