Support tvOS and watchOS (and simulator) targets #48862

comex · 2018-03-09T03:16:36Z

Apple's division of OS targets is a bit odd: apps for iPhones and iPads both use an iOS or "iPhoneOS" target, but watchOS and tvOS are treated as entirely separate targets or "platforms".

rustc currently supports macOS ({x86_64,i686}-apple-darwin), iOS ({armv7,armv7s,aarch64}-apple-ios), and the iOS Simulator (i386-apple-ios), but not tvOS or watchOS.

Here's the full list of platforms. (I'm not sure if the version-min argument is needed for rustc, but it would be needed in cc-rs, which is also missing support.)

Edit (9/10/19): Changes since this was originally posted:

Simulators now have -simulator in the LLVM triple, e.g. x86_64-apple-tvos12.4.0-simulator
Catalyst (which someone already submitted a PR adding initial support for) has triples like x86_64-apple-ios13.0-macabi. It still uses the macOS SDK, but with a custom header/library search path.
watchOS has an additional architecture, arm64_32; example LLVM triple: arm64_32-apple-watchos6.0.0.

OS Name	Xcode Platform Name	Valid Architectures	LLVM Triple	Clang `-mxxx-version-min`
macOS	`MacOSX`	i386 x86_64	`x86_64-apple-macosx10.13.0`	`-mmacosx-version-min` or `-mmacos-version-min`
iOS	`iPhoneOS`	arm64 armv7 armv7s	`arm64-apple-ios11.2.0`	`-miphoneos-version-min` or `-mios-version-min`
iOS Simulator	`iPhoneOSSimulator`	i386 x86_64	`x86_64-apple-ios11.2.0`	`-miphonesimulator-version-min` or `-mios-simulator-version-min`
watchOS	`WatchOS`	armv7k	`thumbv7k-apple-watchos4.2.0`	`-mwatchos-version-min`
watchOS Simulator	`WatchSimulator`	i386 x86_64	`x86_64-apple-watchos4.2.0`	`-mwatchsimulator-version-min` or `-mwatchos-simulator-version-min`
tvOS	`AppleTVOS`	arm64	`arm64-apple-tvos11.2.0`	`-mappletvos-version-min` or `-mtvos-version-min`
tvOS Simulator	`AppleTVSimulator`	x86_64	`x86_64-apple-tvos11.2.0`	`-mappletvsimulator-version-min` or `-mtvos-simulator-version-min`

Example output of xcodebuild -showsdks:

iOS SDKs:
	iOS 11.2                      	-sdk iphoneos11.2

iOS Simulator SDKs:
	Simulator - iOS 11.2          	-sdk iphonesimulator11.2

macOS SDKs:
	macOS 10.13                   	-sdk macosx10.13

tvOS SDKs:
	tvOS 11.2                     	-sdk appletvos11.2

tvOS Simulator SDKs:
	Simulator - tvOS 11.2         	-sdk appletvsimulator11.2

watchOS SDKs:
	watchOS 4.2                   	-sdk watchos4.2

watchOS Simulator SDKs:
	Simulator - watchOS 4.2       	-sdk watchsimulator4.2

The text was updated successfully, but these errors were encountered:

appaquet · 2019-03-01T13:53:11Z

Starting from the iOS implementation in rustc, I got i386 and armv7k for watchos to compile and link in Xcode 10.2 beta 3. It requires quite a few modifications to support the watchos platform, but I think it's quite trivial as watchOS is based on iOS. Unfortunatelly, it will require changes in quite a few crates that have conditional compilation on iOS target (cc, compiler-rt, backtrace, etc.).

Unfortunately, this isn't sufficient for Apple Store release... Apple now requires a new arm64_32 target as of watchOS 5.0. There is a very recent proposal to upstream it. Xcode comes with a bitcode translation tool that takes armv7k code and translates it to arm64_32 (which I understand being possible as they have same pointer/int size), but couldn't make it work with armv7k generated by rustc...

As mentionned in #35968, in order to prevent this never ending catching up on Xcode, I think using Swift's llvm is the only way to fully support Apple ecosystem...

lerouxrgd · 2019-03-01T15:17:44Z

Would it be feasible to add a codegen-backends implementation based on Swift's llvm ? (In the same way emscripten was added)

pruthvikar · 2020-01-30T17:01:45Z

@appaquet Would you be able to share how you managed to compile and link for armv7k?

appaquet · 2020-01-30T17:07:42Z

@pruthvikar Unfortunately it's been a while and I haven't touched it since, so I may not be very helpful... But here are the changes I had made on rustc: master...appaquet:watchos

But as I had mentioned, arm64_32 was impossible to target since it required changes that had not been merged in LLVM back when I tested it.

pruthvikar · 2020-01-30T17:11:10Z

That should come in very handy, thanks!

Added tvOS as targets This is a first attempt of adding support tvOS as described in #48862. It's got a lot of overlap with [src/librustc_target/spec/apple_ios_base.rs](https://github.com/rust-lang/rust/blob/31dd4f4acbcbdb02b0745d2136399ed664a28050/src/librustc_target/spec/apple_ios_base.rs). I thought about refactoring `apple_ios_base.rs` to include this as well but that would require each of the ios and tvos targets to be of the something like the form `let base = opts(AppleOS::TV, Arch::Arm64)?;` I also did the same thing for watchOS because from what I can tell, all three targets (iOS, tvOS, and watchOS) have the same logic but have different parameters being sent to `xcrun`. Thoughts? As far as the `data_layout` and other parameters to `Target`, I did as much research as I could but it really seems that processor in the [iPhone 11 is the same as the apple TV](https://en.wikipedia.org/wiki/Apple-designed_processors) so I didn't change any of those parameters. I did get this to build and tested that it's actually running the the below logic (because the parameter to `xcrun` is `appletvos` not `tvos`). I didn't manage to get it to actually compile a file with `fn main(){}` because I don't have the stdlib for `aarch64-apple-tvos` compiled it seems. Is there documentation for this? Similar to the ending of #63467, I'm not sure what to do next.

Added tvOS as targets This is a first attempt of adding support tvOS as described in rust-lang#48862. It's got a lot of overlap with [src/librustc_target/spec/apple_ios_base.rs](https://github.com/rust-lang/rust/blob/31dd4f4acbcbdb02b0745d2136399ed664a28050/src/librustc_target/spec/apple_ios_base.rs). I thought about refactoring `apple_ios_base.rs` to include this as well but that would require each of the ios and tvos targets to be of the something like the form `let base = opts(AppleOS::TV, Arch::Arm64)?;` I also did the same thing for watchOS because from what I can tell, all three targets (iOS, tvOS, and watchOS) have the same logic but have different parameters being sent to `xcrun`. Thoughts? As far as the `data_layout` and other parameters to `Target`, I did as much research as I could but it really seems that processor in the [iPhone 11 is the same as the apple TV](https://en.wikipedia.org/wiki/Apple-designed_processors) so I didn't change any of those parameters. I did get this to build and tested that it's actually running the the below logic (because the parameter to `xcrun` is `appletvos` not `tvos`). I didn't manage to get it to actually compile a file with `fn main(){}` because I don't have the stdlib for `aarch64-apple-tvos` compiled it seems. Is there documentation for this? Similar to the ending of rust-lang#63467, I'm not sure what to do next.

Added tvOS as targets This is a first attempt of adding support tvOS as described in #48862. It's got a lot of overlap with [src/librustc_target/spec/apple_ios_base.rs](https://github.com/rust-lang/rust/blob/31dd4f4acbcbdb02b0745d2136399ed664a28050/src/librustc_target/spec/apple_ios_base.rs). I thought about refactoring `apple_ios_base.rs` to include this as well but that would require each of the ios and tvos targets to be of the something like the form `let base = opts(AppleOS::TV, Arch::Arm64)?;` I also did the same thing for watchOS because from what I can tell, all three targets (iOS, tvOS, and watchOS) have the same logic but have different parameters being sent to `xcrun`. Thoughts? As far as the `data_layout` and other parameters to `Target`, I did as much research as I could but it really seems that processor in the [iPhone 11 is the same as the apple TV](https://en.wikipedia.org/wiki/Apple-designed_processors) so I didn't change any of those parameters. I did get this to build and tested that it's actually running the the below logic (because the parameter to `xcrun` is `appletvos` not `tvos`). I didn't manage to get it to actually compile a file with `fn main(){}` because I don't have the stdlib for `aarch64-apple-tvos` compiled it seems. Is there documentation for this? Similar to the ending of #63467, I'm not sure what to do next.

iMonZ · 2022-06-05T01:44:42Z

rustc --print target-list shows "aarch64-apple-tvos" but then I get the error:

~/Downloads/rust   …  rustup target add aarch64-apple-tvos 111ms  Sun 5 Jun 03:43:10 2022
error: toolchain 'beta-aarch64-apple-darwin' does not contain component 'rust-std' for target 'aarch64-apple-tvos'; did you mean 'aarch64-apple-ios'?
note: not all platforms have the standard library pre-compiled: https://doc.rust-lang.org/nightly/rustc/platform-support.html

jinleili · 2022-09-26T09:38:08Z

From https://doc.rust-lang.org/nightly/rustc/platform-support.html, aarch64-apple-tvos target only supports no_std development.

hakonk · 2023-06-18T09:05:46Z

Hi! Is support for Rust std on tvOS something that is worked on, and if so, are there any plans for when it will be rolled out?

hakonk · 2023-06-18T09:21:58Z

I'm also curious about what's needed to make std work on tvOS.

workingjubilee · 2023-07-22T18:42:05Z

See #103503
All of these targets are at the status they should be, I believe.

Closing.

hakonk · 2023-07-23T05:53:27Z

Great, @workingjubilee ! I'm happy to see this!

bcardarella · 2023-09-08T12:46:18Z

am I understanding this issue as indicating that the TvOS simulator is supported? We cannot compile to it but we can compile directly to TvOS

bcardarella · 2023-09-08T12:56:35Z

Just to confirm I'm on the correct version of rustc:

➜  ~ rustc --version
rustc 1.72.0 (5680fa18f 2023-08-23)
➜  ~ rustc --print target-list | grep tvos
aarch64-apple-tvos
x86_64-apple-tvos

workingjubilee · 2023-09-09T01:20:28Z

The tuple naming may be somewhat nonintuitive. The x86_64-apple-tvos target is a simulator target, and the aarch64-apple-tvos target is not, as you can see by the table in comex's original post. I hope that clarifies things? If you desire a rename, more tuples, etc., I recommend pursuing that in a new proposal as due to various circumstances this one is about to be out-of-date for any discussion of how these targets actually are.

bcardarella · 2023-09-09T01:37:28Z

@workingjubilee you're right, let me dig in and see why we're not able to compile for the simulator. Thank you for the quick reply

bcardarella · 2023-09-09T02:16:29Z

@workingjubilee wouldn't the x86_64-apple-tvos architecture not work on the M1/M2 macs as the simulator?

bcardarella · 2023-09-09T02:17:52Z

For example, if I get the compiler targets for WatchOS:

➜  ~ rustc --print target-list | grep watchos
aarch64-apple-watchos-sim
arm64_32-apple-watchos
armv7k-apple-watchos
x86_64-apple-watchos-sim

it includes both the x86 and aarch64 targets for the simulator

bcardarella · 2023-09-09T02:19:05Z

This is Swift's own:

https://github.com/apple/swift/blob/ffbc65c8c48cb38db190fa0618fe2b5937a334b8/utils/build-script-impl#L649-L658

workingjubilee · 2023-09-09T02:47:13Z

@workingjubilee wouldn't the x86_64-apple-tvos architecture not work on the M1/M2 macs as the simulator?

Uhhh, it probably seems obvious to you, but for some reason I am missing the last 20% of context here so I'm not immediately certain what you're actually asking. Which is the other reason why I suggested you open a new issue: It would be nice to see the full "problem statement" ("I want to do X, I tried Y, it didn't work, this was what the compiler vomited out").

You can @ me in that issue if you want my attention specifically, but it is also more likely to get attention in general, because it will be visible to people immediately triaging the issues (especially recently-opened ones). And we may need to determine it's a regression and triage it as such and so on.

Centril added the A-target-specs Area: Compile-target specifications label Mar 10, 2018

XAMPPRocky added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. C-feature-request Category: A feature request, i.e: not implemented / a PR. labels May 14, 2018

Diggsey mentioned this issue May 27, 2018

Add support for watchOS and tvOS targets rust-lang/rustup#1405

Closed

CarlEkman mentioned this issue Nov 2, 2018

Add support for tvOS iZettle/Flow#55

Merged

OptimisticPeach mentioned this issue Jan 3, 2019

Proposition to port math to native implementation MonoGame/MonoGame#6616

Closed

Pacoup mentioned this issue Feb 21, 2019

Support Apple app store bitcode #35968

Closed

simlay mentioned this issue Jan 13, 2020

Added tvOS as targets #68191

Merged

directhex mentioned this issue Mar 22, 2021

Fix iOS/tvOS simulator builds actually being device builds, on arm64 dotnet/icu#95

Merged

thombles mentioned this issue Apr 6, 2021

Add a note about watchOS/tvOS support to the README getditto/rust-bitcode#14

Closed

memsharded mentioned this issue Jan 5, 2022

removed legacy apple tools (but new ones need to be modernized yet) conan-io/conan#10277

Merged

workingjubilee added the O-watchos Operating System: watchOS label Mar 2, 2023

Kylmakalle mentioned this issue Apr 17, 2023

Modern naming for IOS_DEPLOYMENT_TARGET tdlib/td#2405

Merged

workingjubilee added O-macos Operating system: macOS O-ios Operating system: iOS O-tvos Operating system: tvOS (including simulator) labels Jul 22, 2023

workingjubilee closed this as completed Jul 22, 2023

bcardarella mentioned this issue Sep 9, 2023

Support Apple's TvOS Simulator on Apple Silicon #115692

Open

heckj mentioned this issue Oct 28, 2023

Support for watchOS platform? automerge/automerge-swift#74

Open

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Support tvOS and watchOS (and simulator) targets #48862

Support tvOS and watchOS (and simulator) targets #48862

comex commented Mar 9, 2018 •

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workingjubilee commented Sep 9, 2023

Support tvOS and watchOS (and simulator) targets #48862

Support tvOS and watchOS (and simulator) targets #48862

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