[NativeAOT LLVM] Missing main export when using IlcExportUnmanagedEntrypoint=true

[maraf]

If I set IlcExportUnmanagedEntrypoint=true, main is not exported.
It can be fixed by adding <CustomLinkerArg Include="-Wl,--export,__main_argc_argv" />

https://github.com/dotnet/runtimelab/blob/feature/NativeAOT-LLVM/src/coreclr/tools/aot/ILCompiler/Program.cs#L590

Is it correct to add such export explicitly when IlcExportUnmanagedEntrypoint == true && NativeLib == ''?

[ivanpovazan]

Is the question related to the managed main?

If I am not mistaken, managed main is exposed via __managed__Main symbol

[maraf]

Good question. I didn't realized yesterday that I need to call the actual C# main, the one that user, possibly async, so that we can yield to JavaScript loop

[SingleAccretion]

We now export native main explicitly in this configuration: https://github.com/dotnet/runtimelab/blob/1b1dbae4bf879130e59f78ff7d9eb438dd089f9e/src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/ExportsFileWriter.cs#L49C22-L52C22, so this can be considered fixed.