[bug] iOS failed to compile with Xcode15 beta2, unable to load standard library

[pewsheen]

Describe the bug

I'm using macOS14 with Xcode15 Beta2 and trying to run on an iOS simulator.

When I execute pnpm tauri ios dev, it can't compile the Swift package in Tauri and shows error error: unable to load standard library for target 'arm64-apple-ios13.0-simulator'

The code that swift-rs is running:

cd "/Users/jason/Documents/issues/xcode15/dep/tauri/core/tauri/mobile/ios-api" && "swift" "build" "-c" "debug" "--build-path" "/Users/jason/Documents/issues/xcode15/src-tauri/target/aarch64-apple-ios-sim/debug/build/tauri-2743b5cc521eb051/out/swift-rs/Tauri" "-Xswiftc" "-sdk" "-Xswiftc" "/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator17.0.sdk" "-Xswiftc" "-target" "-Xswiftc" "arm64-apple-ios13.0-simulator"

Workaround

It seems to be an SDK issue, so I switch the Xcode back to 14 and it works:
sudo xcode-select -s /Applications/Xcode.app/Contents/Developer

Reproduction

• pnpm create tauri-app
• Follow Tauri v2.0 mobile guide to migrate to 2.0
• pnpm tauri ios dev
• Build failed

Expected behavior

No response

Platform and versions

[✔] Environment
    - OS: Mac OS 14.0.0 X64
    ✔ Xcode Command Line Tools: installed.  --> Xcode15 Beta2 (15A5160n)
    ✔ rustc: 1.70.0 (90c541806 2023-05-31)
    ✔ Cargo: 1.70.0 (ec8a8a0ca 2023-04-25)
    ✔ rustup: 1.26.0 (5af9b9484 2023-04-05)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (default)
    - node: 20.0.0
    - pnpm: 8.6.5
    - yarn: 1.22.19
    - npm: 9.6.4

[-] Packages
    - tauri [RUST]: 2.0.0-alpha.9
    - tauri-build [RUST]: 2.0.0-alpha.5
    - wry [RUST]: 0.28.3
    - tao [RUST]: 0.20.0
    - @tauri-apps/api [NPM]: 2.0.0-alpha.5
    - @tauri-apps/cli [NPM]: 2.0.0-alpha.10

[-] App
    - build-type: bundle
    - CSP: unset
    - distDir: ../dist
    - devPath: http://localhost:1420/
    - framework: Vue.js
    - bundler: Vite

Stack trace

error: failed to run custom build command for `tauri v2.0.0-alpha.9 (/Users/jason/Documents/issues/xcode15/dep/tauri/core/tauri)`

Caused by:
  process didn't exit successfully: `/Users/jason/Documents/issues/xcode15/src-tauri/target/debug/build/tauri-9c77635a1da19f61/build-script-build` (exit status: 101)
  --- stdout
  cargo:rustc-cfg=dev
  cargo:rustc-cfg=mobile
  cargo:rustc-link-search=native=/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator
  cargo:rustc-link-search=native=/usr/lib/swift
  cargo:rustc-link-lib=clang_rt.iossim
  cargo:rustc-link-search=/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/15.0.0/lib/darwin
  iphonesimulator
  Building for debugging...
  error: emit-module command failed with exit code 1 (use -v to see invocation)
  [1/3] Emitting module SwiftRs
  <unknown>:0: error: unable to load standard library for target 'arm64-apple-ios13.0-simulator'
  [2/3] Compiling SwiftRs lib.swift
  <unknown>:0: error: unable to load standard library for target 'arm64-apple-ios13.0-simulator'
  error: fatalError

  --- stderr
  Fetching https://github.com/Brendonovich/swift-rs from cache
  Fetched https://github.com/Brendonovich/swift-rs (0.94s)
  Computing version for https://github.com/Brendonovich/swift-rs
  Computed https://github.com/Brendonovich/swift-rs at 1.0.5 (0.61s)
  Creating working copy for https://github.com/Brendonovich/swift-rs
  Working copy of https://github.com/Brendonovich/swift-rs resolved at 1.0.5
  thread 'main' panicked at 'Failed to compile swift package Tauri', /Users/jason/.cargo/registry/src/index.crates.io-6f17d22bba15001f/swift-rs-1.0.5/src-rs/build.rs:272:17
  stack backtrace:
     0: rust_begin_unwind
               at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library/std/src/panicking.rs:578:5
     1: core::panicking::panic_fmt
               at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library/core/src/panicking.rs:67:14
     2: swift_rs::build::SwiftLinker::link
               at /Users/jason/.cargo/registry/src/index.crates.io-6f17d22bba15001f/swift-rs-1.0.5/src-rs/build.rs:272:17
     3: tauri_build::mobile::link_swift_library
               at /Users/jason/Documents/issues/xcode15/dep/tauri/core/tauri-build/src/mobile.rs:104:3
     4: build_script_build::main
               at ./build.rs:130:7
     5: core::ops::function::FnOnce::call_once
               at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library/core/src/ops/function.rs:250:5
  note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
       Error [tauri_cli_node] Failed to run `cargo build`: command ["cargo", "build", "--package", "xcode15", "--manifest-path", "/Users/jason/Documents/issues/xcode15/src-tauri/Cargo.toml", "--target", "aarch64-apple-ios-sim", "--features", "tauri/rustls-tls", "--lib", "--no-default-features"] exited with code 101
 ELIFECYCLE  Command failed with exit code 1.

** BUILD FAILED **

Additional context

No response

[pewsheen]

Fixed in Brendonovich/swift-rs#51