.net9でNativeAotのライブラリを試す

dotnet new classlib -o example
cd example
echo 'namespace example;

using System.Runtime.InteropServices;

public static class NativeLib
{
    [UnmanagedCallersOnly(EntryPoint = "add")]
    public static int Add(int a, int b)
    {
        return a + b;
    }
}
' > Class1.cs

dotnet publish -c Release --ucr
cp bin/Release/net9.0/osx-arm64/publish/example.dylib .
nm -g example.dylib | grep add

echo '#ifndef EXAMPLE_H
#define EXAMPLE_H
#ifdef __cplusplus
extern "C" {
#endif
int add(int a, int b);
#ifdef __cplusplus
}
#endif
#endif
' > example.h

echo 'import Foundation
let result = add(3, 5)
print("Result: \(result)")
' > main.swift

swiftc -import-objc-header example.h main.swift -o main -Xlinker example.dylib
./main
Result: 8

 nm -g example.dylib | grep add
000000000009d450 S _add
                 U _dladdr
                 U _pthread_get_stackaddr_np