Support Apple's TvOS Simulator on Apple Silicon #115692
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Isn't this |
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@Urgau according to this issue: #48862 (comment) Rust implemented support for the TvOS Simulator compile target of |
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A bit more on this, Apple added support for both x86 and arm64 tvos simulator in Swift 5.3: apple/swift@795c363 |
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There's some annoying lack of precision in the target names, for (EDIT: and as actually got mentioned just yesterday some standardization of the target names would make this less confusing, the newer |
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@Nemo157 agreed, the naming has been in part an issue. Would changing these names to follow a convention be considered a breaking change? |
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Yes, but they're tier 3 targets where breaking changes are allowed. There's an in-progress rename of another tier 3 target that provides a good example: #110596, the first step would probably be to start a discussion on zulip to gauge whether the target maintainers are on board with changing the name, and then submit an MCP like the wasi one. |
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@Nemo157 I've had difficulty with knowing where to post messages on Zulip before and get blasted pretty quickly. I've found that community to be pretty hostile to newcomers that are unaware of where the correct place is to ask questions |
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So...
Moreover, even if we could just do the rename without any scrutiny beyond t-compiler r+ (one could make an argument for this in the case of x86_64-apple-tvos-sim), I would prefer if adding So, if you wanna add The rest of comment is about renaming all of the misnamed simulator targets, of which -- So, renaming. I have Thoughts. This issue applies to several simulator targets right now, a lot of them have names that fail to reflect that they're simulators (among other issues). They're mostly tier 3, with a single tier 2, we should just do all the renames in with a single batch MCP/FCP/whatever, to ensure everything that is a Like, right now, to know if a target is a simulator, you either have to check it, memorize the set, or reason it out based on the history of Apple releases of hardware and software, and possibly also Rust's support for that target. For example, the reasoning you might have to apply for figuring out
Maybe this is an exaggeration, but it's pretty bad, got worse with the addition of catalyst. It also stands to continue to get worse in the future. So, we can remove this by renaming simulator targets to end in
If we do that, and then never add an apple simulator target that doesn't end with This is a lot, but writing all this down has been on my TODO for a while. I'll file an MCP for the 3 target renames later, it's off topic for this but I got pinged and even emailed to ask. |
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Also we should not call it arm64. It doesn't matter if Apple uses arm64 to refer to that architecture, we call it aarch64 on Apple and non-Apple targets alike and there's no reason to diverge here. I am firmly against naming the simulator target which runs on the Apple Silicon Macs anything other than |
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@thomcc I'm 👍 on the larger more-correct effort. If you need help I'm happy to pull in some resources |
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fwiw, I'm not suggesting renaming to |
fmease
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…ustc, r=thomcc tvOS simulator support on Apple Silicon for rustc Closes or is a subtask of rust-lang#115692. # Tier 3 Target Policy At this tier, the Rust project provides no official support for a target, so we place minimal requirements on the introduction of targets. > * A tier 3 target must have a designated developer or developers (the "target maintainers") on record to be CCed when issues arise regarding the target. (The mechanism to track and CC such developers may evolve over time.) See [`src/doc/rustc/src/platform-support/apple-tvos.md`](https://github.com/rust-lang/rust/blob/4ab4d48ee59968d8d519ccda5e12c9d200cc092f/src/doc/rustc/src/platform-support/apple-tvos.md) > * Targets must use naming consistent with any existing targets; for instance, a target for the same CPU or OS as an existing Rust target should use the same name for that CPU or OS. Targets should normally use the same names and naming conventions as used elsewhere in the broader ecosystem beyond Rust (such as in other toolchains), unless they have a very good reason to diverge. Changing the name of a target can be highly disruptive, especially once the target reaches a higher tier, so getting the name right is important even for a tier 3 target. > * Target names should not introduce undue confusion or ambiguity unless absolutely necessary to maintain ecosystem compatibility. For example, if the name of the target makes people extremely likely to form incorrect beliefs about what it targets, the name should be changed or augmented to disambiguate it. > * If possible, use only letters, numbers, dashes and underscores for the name. Periods (.) are known to cause issues in Cargo. This naming scheme matches `$ARCH-$VENDOR-$OS-$ABI` (I think `sim` is the ABI here) which is matches the iOS apple silicon simulator (`aarch64-apple-ios-sim`). [There is some discussion about renaming some apple simulator targets](rust-lang#115692 (comment)) to match the `-sim` suffix but that is outside the scope of this PR. > * Tier 3 targets may have unusual requirements to build or use, but must not create legal issues or impose onerous legal terms for the Rust project or for Rust developers or users. > > * The target must not introduce license incompatibilities. > * Anything added to the Rust repository must be under the standard Rust license (MIT OR Apache-2.0). > * The target must not cause the Rust tools or libraries built for any other host (even when supporting cross-compilation to the target) to depend on any new dependency less permissive than the Rust licensing policy. This applies whether the dependency is a Rust crate that would require adding new license exceptions (as specified by the tidy tool in the rust-lang/rust repository), or whether the dependency is a native library or binary. In other words, the introduction of the target must not cause a user installing or running a version of Rust or the Rust tools to be subject to any new license requirements. > * Compiling, linking, and emitting functional binaries, libraries, or other code for the target (whether hosted on the target itself or cross-compiling from another target) must not depend on proprietary (non-FOSS) libraries. Host tools built for the target itself may depend on the ordinary runtime libraries supplied by the platform and commonly used by other applications built for the target, but those libraries must not be required for code generation for the target; cross-compilation to the target must not require such libraries at all. For instance, rustc built for the target may depend on a common proprietary C runtime library or console output library, but must not depend on a proprietary code generation library or code optimization library. Rust's license permits such combinations, but the Rust project has no interest in maintaining such combinations within the scope of Rust itself, even at tier 3. > * "onerous" here is an intentionally subjective term. At a minimum, "onerous" legal/licensing terms include but are not limited to: non-disclosure requirements, non-compete requirements, contributor license agreements (CLAs) or equivalent, "non-commercial"/"research-only"/etc terms, requirements conditional on the employer or employment of any particular Rust developers, revocable terms, any requirements that create liability for the Rust project or its developers or users, or any requirements that adversely affect the livelihood or prospects of the Rust project or its developers or users. This contribution is fully available under the standard Rust license with no additional legal restrictions whatsoever. This PR does not introduce any new dependency less permissive than the Rust license policy. The new targets do not depend on proprietary libraries. > * Tier 3 targets should attempt to implement as much of the standard libraries as possible and appropriate (core for most targets, alloc for targets that can support dynamic memory allocation, std for targets with an operating system or equivalent layer of system-provided functionality), but may leave some code unimplemented (either unavailable or stubbed out as appropriate), whether because the target makes it impossible to implement or challenging to implement. The authors of pull requests are not obligated to avoid calling any portions of the standard library on the basis of a tier 3 target not implementing those portions. This new target implements as much of the standard library as the other tvOS targets do. > * The target must provide documentation for the Rust community explaining how to build for the target, using cross-compilation if possible. If the target supports running binaries, or running tests (even if they do not pass), the documentation must explain how to run such binaries or tests for the target, using emulation if possible or dedicated hardware if necessary. I have added the target to the other tvOS targets in [`src/doc/rustc/src/platform-support/apple-tvos.md`](https://github.com/rust-lang/rust/blob/4ab4d48ee59968d8d519ccda5e12c9d200cc092f/src/doc/rustc/src/platform-support/apple-tvos.md) > * Neither this policy nor any decisions made regarding targets shall create any binding agreement or estoppel by any party. If any member of an approving Rust team serves as one of the maintainers of a target, or has any legal or employment requirement (explicit or implicit) that might affect their decisions regarding a target, they must recuse themselves from any approval decisions regarding the target's tier status, though they may otherwise participate in discussions. > * This requirement does not prevent part or all of this policy from being cited in an explicit contract or work agreement (e.g. to implement or maintain support for a target). This requirement exists to ensure that a developer or team responsible for reviewing and approving a target does not face any legal threats or obligations that would prevent them from freely exercising their judgment in such approval, even if such judgment involves subjective matters or goes beyond the letter of these requirements. > * Tier 3 targets must not impose burden on the authors of pull requests, or other developers in the community, to maintain the target. In particular, do not post comments (automated or manual) on a PR that derail or suggest a block on the PR based on a tier 3 target. Do not send automated messages or notifications (via any medium, including via `@)` to a PR author or others involved with a PR regarding a tier 3 target, unless they have opted into such messages. > * Backlinks such as those generated by the issue/PR tracker when linking to an issue or PR are not considered a violation of this policy, within reason. However, such messages (even on a separate repository) must not generate notifications to anyone involved with a PR who has not requested such notifications. > * Patches adding or updating tier 3 targets must not break any existing tier 2 or tier 1 target, and must not knowingly break another tier 3 target without approval of either the compiler team or the maintainers of the other tier 3 target. > * In particular, this may come up when working on closely related targets, such as variations of the same architecture with different features. Avoid introducing unconditional uses of features that another variation of the target may not have; use conditional compilation or runtime detection, as appropriate, to let each target run code supported by that target. I acknowledge these requirements and intend to ensure that they are met. This target does not touch any existing tier 2 or tier 1 targets and should not break any other targets.
…ustc, r=thomcc tvOS simulator support on Apple Silicon for rustc Closes or is a subtask of rust-lang#115692. # Tier 3 Target Policy At this tier, the Rust project provides no official support for a target, so we place minimal requirements on the introduction of targets. > * A tier 3 target must have a designated developer or developers (the "target maintainers") on record to be CCed when issues arise regarding the target. (The mechanism to track and CC such developers may evolve over time.) See [`src/doc/rustc/src/platform-support/apple-tvos.md`](https://github.com/rust-lang/rust/blob/4ab4d48ee59968d8d519ccda5e12c9d200cc092f/src/doc/rustc/src/platform-support/apple-tvos.md) > * Targets must use naming consistent with any existing targets; for instance, a target for the same CPU or OS as an existing Rust target should use the same name for that CPU or OS. Targets should normally use the same names and naming conventions as used elsewhere in the broader ecosystem beyond Rust (such as in other toolchains), unless they have a very good reason to diverge. Changing the name of a target can be highly disruptive, especially once the target reaches a higher tier, so getting the name right is important even for a tier 3 target. > * Target names should not introduce undue confusion or ambiguity unless absolutely necessary to maintain ecosystem compatibility. For example, if the name of the target makes people extremely likely to form incorrect beliefs about what it targets, the name should be changed or augmented to disambiguate it. > * If possible, use only letters, numbers, dashes and underscores for the name. Periods (.) are known to cause issues in Cargo. This naming scheme matches `$ARCH-$VENDOR-$OS-$ABI` (I think `sim` is the ABI here) which is matches the iOS apple silicon simulator (`aarch64-apple-ios-sim`). [There is some discussion about renaming some apple simulator targets](rust-lang#115692 (comment)) to match the `-sim` suffix but that is outside the scope of this PR. > * Tier 3 targets may have unusual requirements to build or use, but must not create legal issues or impose onerous legal terms for the Rust project or for Rust developers or users. > > * The target must not introduce license incompatibilities. > * Anything added to the Rust repository must be under the standard Rust license (MIT OR Apache-2.0). > * The target must not cause the Rust tools or libraries built for any other host (even when supporting cross-compilation to the target) to depend on any new dependency less permissive than the Rust licensing policy. This applies whether the dependency is a Rust crate that would require adding new license exceptions (as specified by the tidy tool in the rust-lang/rust repository), or whether the dependency is a native library or binary. In other words, the introduction of the target must not cause a user installing or running a version of Rust or the Rust tools to be subject to any new license requirements. > * Compiling, linking, and emitting functional binaries, libraries, or other code for the target (whether hosted on the target itself or cross-compiling from another target) must not depend on proprietary (non-FOSS) libraries. Host tools built for the target itself may depend on the ordinary runtime libraries supplied by the platform and commonly used by other applications built for the target, but those libraries must not be required for code generation for the target; cross-compilation to the target must not require such libraries at all. For instance, rustc built for the target may depend on a common proprietary C runtime library or console output library, but must not depend on a proprietary code generation library or code optimization library. Rust's license permits such combinations, but the Rust project has no interest in maintaining such combinations within the scope of Rust itself, even at tier 3. > * "onerous" here is an intentionally subjective term. At a minimum, "onerous" legal/licensing terms include but are not limited to: non-disclosure requirements, non-compete requirements, contributor license agreements (CLAs) or equivalent, "non-commercial"/"research-only"/etc terms, requirements conditional on the employer or employment of any particular Rust developers, revocable terms, any requirements that create liability for the Rust project or its developers or users, or any requirements that adversely affect the livelihood or prospects of the Rust project or its developers or users. This contribution is fully available under the standard Rust license with no additional legal restrictions whatsoever. This PR does not introduce any new dependency less permissive than the Rust license policy. The new targets do not depend on proprietary libraries. > * Tier 3 targets should attempt to implement as much of the standard libraries as possible and appropriate (core for most targets, alloc for targets that can support dynamic memory allocation, std for targets with an operating system or equivalent layer of system-provided functionality), but may leave some code unimplemented (either unavailable or stubbed out as appropriate), whether because the target makes it impossible to implement or challenging to implement. The authors of pull requests are not obligated to avoid calling any portions of the standard library on the basis of a tier 3 target not implementing those portions. This new target implements as much of the standard library as the other tvOS targets do. > * The target must provide documentation for the Rust community explaining how to build for the target, using cross-compilation if possible. If the target supports running binaries, or running tests (even if they do not pass), the documentation must explain how to run such binaries or tests for the target, using emulation if possible or dedicated hardware if necessary. I have added the target to the other tvOS targets in [`src/doc/rustc/src/platform-support/apple-tvos.md`](https://github.com/rust-lang/rust/blob/4ab4d48ee59968d8d519ccda5e12c9d200cc092f/src/doc/rustc/src/platform-support/apple-tvos.md) > * Neither this policy nor any decisions made regarding targets shall create any binding agreement or estoppel by any party. If any member of an approving Rust team serves as one of the maintainers of a target, or has any legal or employment requirement (explicit or implicit) that might affect their decisions regarding a target, they must recuse themselves from any approval decisions regarding the target's tier status, though they may otherwise participate in discussions. > * This requirement does not prevent part or all of this policy from being cited in an explicit contract or work agreement (e.g. to implement or maintain support for a target). This requirement exists to ensure that a developer or team responsible for reviewing and approving a target does not face any legal threats or obligations that would prevent them from freely exercising their judgment in such approval, even if such judgment involves subjective matters or goes beyond the letter of these requirements. > * Tier 3 targets must not impose burden on the authors of pull requests, or other developers in the community, to maintain the target. In particular, do not post comments (automated or manual) on a PR that derail or suggest a block on the PR based on a tier 3 target. Do not send automated messages or notifications (via any medium, including via ``@)`` to a PR author or others involved with a PR regarding a tier 3 target, unless they have opted into such messages. > * Backlinks such as those generated by the issue/PR tracker when linking to an issue or PR are not considered a violation of this policy, within reason. However, such messages (even on a separate repository) must not generate notifications to anyone involved with a PR who has not requested such notifications. > * Patches adding or updating tier 3 targets must not break any existing tier 2 or tier 1 target, and must not knowingly break another tier 3 target without approval of either the compiler team or the maintainers of the other tier 3 target. > * In particular, this may come up when working on closely related targets, such as variations of the same architecture with different features. Avoid introducing unconditional uses of features that another variation of the target may not have; use conditional compilation or runtime detection, as appropriate, to let each target run code supported by that target. I acknowledge these requirements and intend to ensure that they are met. This target does not touch any existing tier 2 or tier 1 targets and should not break any other targets.
Rollup merge of rust-lang#115773 - simlay:arch64-apple-tvos-sim-for-rustc, r=thomcc tvOS simulator support on Apple Silicon for rustc Closes or is a subtask of rust-lang#115692. # Tier 3 Target Policy At this tier, the Rust project provides no official support for a target, so we place minimal requirements on the introduction of targets. > * A tier 3 target must have a designated developer or developers (the "target maintainers") on record to be CCed when issues arise regarding the target. (The mechanism to track and CC such developers may evolve over time.) See [`src/doc/rustc/src/platform-support/apple-tvos.md`](https://github.com/rust-lang/rust/blob/4ab4d48ee59968d8d519ccda5e12c9d200cc092f/src/doc/rustc/src/platform-support/apple-tvos.md) > * Targets must use naming consistent with any existing targets; for instance, a target for the same CPU or OS as an existing Rust target should use the same name for that CPU or OS. Targets should normally use the same names and naming conventions as used elsewhere in the broader ecosystem beyond Rust (such as in other toolchains), unless they have a very good reason to diverge. Changing the name of a target can be highly disruptive, especially once the target reaches a higher tier, so getting the name right is important even for a tier 3 target. > * Target names should not introduce undue confusion or ambiguity unless absolutely necessary to maintain ecosystem compatibility. For example, if the name of the target makes people extremely likely to form incorrect beliefs about what it targets, the name should be changed or augmented to disambiguate it. > * If possible, use only letters, numbers, dashes and underscores for the name. Periods (.) are known to cause issues in Cargo. This naming scheme matches `$ARCH-$VENDOR-$OS-$ABI` (I think `sim` is the ABI here) which is matches the iOS apple silicon simulator (`aarch64-apple-ios-sim`). [There is some discussion about renaming some apple simulator targets](rust-lang#115692 (comment)) to match the `-sim` suffix but that is outside the scope of this PR. > * Tier 3 targets may have unusual requirements to build or use, but must not create legal issues or impose onerous legal terms for the Rust project or for Rust developers or users. > > * The target must not introduce license incompatibilities. > * Anything added to the Rust repository must be under the standard Rust license (MIT OR Apache-2.0). > * The target must not cause the Rust tools or libraries built for any other host (even when supporting cross-compilation to the target) to depend on any new dependency less permissive than the Rust licensing policy. This applies whether the dependency is a Rust crate that would require adding new license exceptions (as specified by the tidy tool in the rust-lang/rust repository), or whether the dependency is a native library or binary. In other words, the introduction of the target must not cause a user installing or running a version of Rust or the Rust tools to be subject to any new license requirements. > * Compiling, linking, and emitting functional binaries, libraries, or other code for the target (whether hosted on the target itself or cross-compiling from another target) must not depend on proprietary (non-FOSS) libraries. Host tools built for the target itself may depend on the ordinary runtime libraries supplied by the platform and commonly used by other applications built for the target, but those libraries must not be required for code generation for the target; cross-compilation to the target must not require such libraries at all. For instance, rustc built for the target may depend on a common proprietary C runtime library or console output library, but must not depend on a proprietary code generation library or code optimization library. Rust's license permits such combinations, but the Rust project has no interest in maintaining such combinations within the scope of Rust itself, even at tier 3. > * "onerous" here is an intentionally subjective term. At a minimum, "onerous" legal/licensing terms include but are not limited to: non-disclosure requirements, non-compete requirements, contributor license agreements (CLAs) or equivalent, "non-commercial"/"research-only"/etc terms, requirements conditional on the employer or employment of any particular Rust developers, revocable terms, any requirements that create liability for the Rust project or its developers or users, or any requirements that adversely affect the livelihood or prospects of the Rust project or its developers or users. This contribution is fully available under the standard Rust license with no additional legal restrictions whatsoever. This PR does not introduce any new dependency less permissive than the Rust license policy. The new targets do not depend on proprietary libraries. > * Tier 3 targets should attempt to implement as much of the standard libraries as possible and appropriate (core for most targets, alloc for targets that can support dynamic memory allocation, std for targets with an operating system or equivalent layer of system-provided functionality), but may leave some code unimplemented (either unavailable or stubbed out as appropriate), whether because the target makes it impossible to implement or challenging to implement. The authors of pull requests are not obligated to avoid calling any portions of the standard library on the basis of a tier 3 target not implementing those portions. This new target implements as much of the standard library as the other tvOS targets do. > * The target must provide documentation for the Rust community explaining how to build for the target, using cross-compilation if possible. If the target supports running binaries, or running tests (even if they do not pass), the documentation must explain how to run such binaries or tests for the target, using emulation if possible or dedicated hardware if necessary. I have added the target to the other tvOS targets in [`src/doc/rustc/src/platform-support/apple-tvos.md`](https://github.com/rust-lang/rust/blob/4ab4d48ee59968d8d519ccda5e12c9d200cc092f/src/doc/rustc/src/platform-support/apple-tvos.md) > * Neither this policy nor any decisions made regarding targets shall create any binding agreement or estoppel by any party. If any member of an approving Rust team serves as one of the maintainers of a target, or has any legal or employment requirement (explicit or implicit) that might affect their decisions regarding a target, they must recuse themselves from any approval decisions regarding the target's tier status, though they may otherwise participate in discussions. > * This requirement does not prevent part or all of this policy from being cited in an explicit contract or work agreement (e.g. to implement or maintain support for a target). This requirement exists to ensure that a developer or team responsible for reviewing and approving a target does not face any legal threats or obligations that would prevent them from freely exercising their judgment in such approval, even if such judgment involves subjective matters or goes beyond the letter of these requirements. > * Tier 3 targets must not impose burden on the authors of pull requests, or other developers in the community, to maintain the target. In particular, do not post comments (automated or manual) on a PR that derail or suggest a block on the PR based on a tier 3 target. Do not send automated messages or notifications (via any medium, including via ``@)`` to a PR author or others involved with a PR regarding a tier 3 target, unless they have opted into such messages. > * Backlinks such as those generated by the issue/PR tracker when linking to an issue or PR are not considered a violation of this policy, within reason. However, such messages (even on a separate repository) must not generate notifications to anyone involved with a PR who has not requested such notifications. > * Patches adding or updating tier 3 targets must not break any existing tier 2 or tier 1 target, and must not knowingly break another tier 3 target without approval of either the compiler team or the maintainers of the other tier 3 target. > * In particular, this may come up when working on closely related targets, such as variations of the same architecture with different features. Avoid introducing unconditional uses of features that another variation of the target may not have; use conditional compilation or runtime detection, as appropriate, to let each target run code supported by that target. I acknowledge these requirements and intend to ensure that they are met. This target does not touch any existing tier 2 or tier 1 targets and should not break any other targets.
Also hit this today, filed #121210 for that. |
Currently it appears that Rust can only compile for TvOS's Simulator running on x86. Apple Silicon need arm64. Specifically we need compile support for this target: https://github.com/apple/swift/blob/ffbc65c8c48cb38db190fa0618fe2b5937a334b8/utils/build-script-impl#L649-L658
Currently there is only:
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