Allow the iOS toolchain to be built on Linux
The iOS toolchain can be built on Linux with minor changes. The compilation will invoke `xcrun` to find the path to the iPhone SDK but a fake `xcrun` executable can be used. ``` #!/bin/sh echo "/path/to/sdk" ``` The iOS toolchain can then be built and linked with rustup. ``` $ ./x.py build --stage 2 --host x86_64-unknown-linux-gnu \ --target aarch64-apple-ios $ rustup toolchain link stage1 build/x86_64-unknown-linux-gnu/stage1 ``` It's possible to take this toolchain and compile an iOS executable with it. This requires the ld64 linker and an iOS SDK. The ld64 linker can be taken from [cctools](https://github.com/tpoechtrager/cctools-port). A project's .cargo/config can then be edited to use the linker for this target. ``` [target.aarch64-apple-ios] linker = "/path/to/cctools/bin/arm-apple-darwin-ld" rustflags = [ "-C", """ link-args= -F/path/to/sdk/System/Library/Frameworks -L/path/to/sdk/usr/lib -L/path/to/sdk/usr/lib/system/ -adhoc_codesign """, ] ```
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@ -166,11 +166,6 @@ pub fn check(build: &mut Build) {
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}
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for target in &build.targets {
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// Can't compile for iOS unless we're on macOS
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if target.contains("apple-ios") && !build.build.contains("apple-darwin") {
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panic!("the iOS target is only supported on macOS");
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}
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build
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.config
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.target_config
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