Rustup: Rustup does not add *-apple-ios targets.

[moriturus]

I try to add *-apple-ios targets to cargo/rustc to build a tiny library running on iOS.
However, the rustc does not recognize the added targets.

I tried this:

$ rustup target add aarch64-apple-ios armv7s-apple-ios armv7-apple-ios x86_64-apple-ios i386-apple-ios
info: downloading component 'rust-std' for 'aarch64-apple-ios'
info: installing component 'rust-std' for 'aarch64-apple-ios'
info: downloading component 'rust-std' for 'armv7s-apple-ios'
info: installing component 'rust-std' for 'armv7s-apple-ios'
info: downloading component 'rust-std' for 'armv7-apple-ios'
info: installing component 'rust-std' for 'armv7-apple-ios'
info: downloading component 'rust-std' for 'x86_64-apple-ios'
info: installing component 'rust-std' for 'x86_64-apple-ios'
info: downloading component 'rust-std' for 'i386-apple-ios'
info: installing component 'rust-std' for 'i386-apple-ios'

I expected to see this happen:

$ rustup run nightly rustc --print target-list | grep ios 
aarch64-apple-ios
armv7-apple-ios
armv7s-apple-ios
i386-apple-ios
x86_64-apple-ios

Instead, this happened:

$ rustup run nightly rustc --print target-list | grep ios 
// no lines appeared

I'm using:

$ uname -a
Darwin <my hostname> 17.2.0 Darwin Kernel Version 17.2.0: Fri Sep 29 18:27:05 PDT 2017; root:xnu-4570.20.62~3/RELEASE_X86_64 x86_64 // macOS High Sierra 10.13.1(17B1003)
$ rustup --version
rustup 1.7.0 (813f7b7a8 2017-10-30)
$ rustup run nightly rustc -V
rustc 1.24.0-nightly (5a2465e2b 2017-12-06)

[Susurrus]

Me and @asomers have both run into this problem as well. It looks like rustc for these targets in not installed properly even though std is.

[MarcTreySonos]

you need to have xcode installed , full xcode .. not just the cli tools.

xcode-select --print-path 
sudo xcodebuild -license
sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer

there is no hints nor information but this is required for the ios target to show up for rust (which make sens) , see https://github.com/rust-lang/rust/issues/36157

[Susurrus]

@mtrey neither @asomers not I arerunning OS X so that doesn't apply to us. It's not clear if @moritorus is cross-compiling as well, but I inferred from this issues description that they were.

[MarcTreySonos]

@Susurrus : without xcode no ios target

unless there is something I missed : no macos -> no xcode -> no ios

edit : I have just installed a new mac for cross compiling , run into the issue you described , compared with a working node .. hence my comment

[Susurrus]

That makes sense for cargo build, but I'm wondering if cargo check could be supported for all targets on all platforms since it doesn't go through to generating a binary.

[Diggsey]

Please open an issue on rust-lang/rust for the cargo check feature.