arm64サポート有無のチェックはこんな感じとすることに。

$ echo 'print("hello")'|xcrun --toolchain org.swift.50320190830a swiftc -target arm64-apple-macos10.9 - -o /dev/null <unknown>:0: error: unable to load standard library for target 'arm64-apple-macos10.9' $ echo 'print("hello")'|xcrun --toolchain org.swift.531202011121a swiftc -target arm64-apple-macos10.9 - -o /dev/null

で、同様にWasmをチェックしてみるとエラーになった。

$ echo 'print("hello")'|xcrun --toolchain org.swiftwasm.20201102 swiftc -target wasm32-unknown-wasi - -o /dev/null wasm-ld: error: cannot open crt1.o: No such file or directory wasm-ld: error: unable to find library -ldl wasm-ld: error: unable to find library -lc++ wasm-ld: error: unable to find library -lc++abi wasm-ld: error: unable to find library -lm wasm-ld: error: unable to find library -lwasi-emulated-mman wasm-ld: error: unable to find library -lc clang-10: error: linker command failed with exit code 1 (use -v to see invocation) <unknown>:0: error: link command failed with exit code 1 (use -v to see invocation)

docker版はエラーにならない。 $ echo 'print("hello")'|docker run ghcr.io/swiftwasm/swift swiftc -target wasm32-unknown-wasi - -o /dev/null (edited)