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| -rw-r--r-- | src/doc/rustc/src/platform-support/apple-tvos.md | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/src/doc/rustc/src/platform-support/apple-tvos.md b/src/doc/rustc/src/platform-support/apple-tvos.md index 2446c5fc10f..5a22402324c 100644 --- a/src/doc/rustc/src/platform-support/apple-tvos.md +++ b/src/doc/rustc/src/platform-support/apple-tvos.md @@ -18,9 +18,9 @@ These targets are cross-compiled. You will need appropriate versions of Xcode and the SDKs for tvOS (`AppleTVOS.sdk`) and/or the tvOS Simulator (`AppleTVSimulator.sdk`) to build a toolchain and target these platforms. -The targets support the full standard library including the allocator to the -best of my knowledge, however they are very new, not yet well-tested, and -it is possible that there are various bugs. +The targets support most (see below) of the standard library including the +allocator to the best of my knowledge, however they are very new, not yet +well-tested, and it is possible that there are various bugs. In theory we support back to tvOS version 7.0, although the actual minimum version you can target may be newer than this, for example due to the versions @@ -30,6 +30,19 @@ As with the other Apple targets, `rustc` respects the common environment variables used by Xcode to configure this, in this case `TVOS_DEPLOYMENT_TARGET`. +#### Incompletely supported library functionality + +As mentioned, "most" of the standard library is supported, which means that some portions +are known to be unsupported. The following APIs are currently known to have +missing or incomplete support: + +- `std::process::Command`'s API will return an error if it is configured in a + manner which cannot be performed using `posix_spawn` -- this is because the + more flexible `fork`/`exec`-based approach is prohibited on these platforms in + favor of `posix_spawn{,p}`. A concrete set of cases where this will occur is + difficult to enumerate (and would quickly become stale), but in some cases it + may be worked around by tweaking the manner in which `Command` is invoked. + ## Building the target The targets can be built by enabling them for a `rustc` build in `config.toml`, by adding, for example: |