独学プログラミング演習
set SDKROOT=%SystemDrive%/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk
swiftc -target x86_64-unknown-windows-msvc -sdk %SDKROOT% -I %SDKROOT%/usr/lib/swift -L %SDKROOT%/usr/lib/swift/windows helloworld.swift -o helloworld.exe