Globalization support in .NET 5

[steveisok]

No description provided.

[tarekgh]

Added some little comments. LGTM otherwise.

[danmoseley]

cc @ericstj

[jkotas]

Would it make sense to statically link the ICU and the System.Globalization shim together, so that we only carry implementation for the the ICU APIs that the shim needs?

[safern]

Would that break app local scenarios? This way if people want to upgrade to a newer ICU, they couldn't because we carry the implementations that we built against, no?

[jkotas]

This paragraph is proposing to have our own custom build of ICU. There would not be a newer version unless we build it.

[safern]

Ah I see. I thought you were proposing that for all scenarios.

[steveisok]

I don't know what the implications are, if any, behind that. I'm sure it's something we could determine during when implementing.

[danmoseley]

@steveisok what remains to call this final - do you need more signoffs, are there more edits to make? If it's final, we can get started.

[steveisok]

I addressed the feedback and I think it's ready to go.

[steveisok]

@marek-safar There are a few comments that you are better equipped to address. Other than that, I think I've incorporated the feedback.

[steveisok]

@danmosemsft @stephentoub Can I get your approval?

[danmoseley]

If @safern / @stephentoub / @tarekgh are signed off that is good enough for me.

[danmoseley]

Any signoffs required other than @stephentoub ? Any mono folks?

[spouliot]

TBH it still bugs me that we do not have much data about the size impact for (mobile) apps where the native bits (and data) will need to added to the application bundles: iOS, tvOS and watchOS.

It's also not clear for macOS versus the Mac App Store (which is a target for Xamarin.Mac) mostly because it never was an issue (XM never linked to libicu). If it is considered a private framework on macOS (like other Apple platforms) then the current "use system bits" won't work for Xamarin.Mac.

[danmoseley]

My inclination I think would be to capture anything remaining as unknowns/TBD and merge this as it's otherwise in a good state.