[tvOS][globalization] Missing support for ICU

[spouliot]

Description

#49406 added ICU support for iOS (in P3). However similar support for tvOS was not added and runs into the same issue (stuck with invariant).

Note: it's unclear is Catalyst apps will be allowed (for App Store) to use the system ICU like it's being done for macOS. If Catalyst apps goes thru the same review process as iOS apps then ICU support will also be needed.

Configuration

• SDK 6.0.100-preview.3.21202.5

Regression?

Yes. Legacy Xamarin.tvOS SDK supports globalization.

Other information

• Support loading ICU data from managed Interop #49406
• [.NET] Only the invariant culture works macios#8906

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Issue Details

---

Description

#49406 added ICU support for iOS (in P3). However similar support for tvOS was not added and runs into the same issue (stuck with invariant).

Note: it's unclear is Catalyst apps will be allowed (for App Store) to use the system ICU like it's being done for macOS. If Catalyst apps goes thru the same review process as iOS apps then ICU support will also be needed.

Configuration

• SDK 6.0.100-preview.3.21202.5

Regression?

Yes. Legacy Xamarin.tvOS SDK supports globalization.

Other information

• Support loading ICU data from managed Interop #49406
• [.NET] Only the invariant culture works macios#8906

Author:	spouliot
Assignees:	-
Labels:	area-System.Globalization, untriaged
Milestone:	-

[spouliot]

c.c. @steveisok

[steveisok]

I validated the icu bits are in the tvOS runtime pack feed. What errors are you seeing?

[spouliot]

The FailFast / missing ICU error happens because of

if TARGET_OS_TV
	rv = 0;
	// Due to https://github.com/dotnet/runtime/issues/48508, we can't link with the .NET version of libmonosgen-2.0.dylib,
	// which means that we can't call monovm_initialize here (libxamarin.dylib fails native linking). Just ignore it for now.
	fprintf (stderr, "xamarin_vm_initialize (%i, %p, %p): Ignored due to https://github.com/dotnet/runtime/issues/48508.\n", propertyCount, propertyKeys, propertyValues);
#else