gltfpack function export

[merco]

I'm trying to export a function like this in gltfpack.exe

extern "C" __declspec (dllexport) void extmain(const char* namein, const char* nameout) {

	meshopt_encodeVertexVersion(0);
	meshopt_encodeIndexVersion(1);
	const char* report = NULL;
	Settings settings = defaults();
	gltfpack(namein, nameout, report, settings);
	fflush(NULL);
}

and use it in C# with this declaration

  [DllImport(EngineDLL, CallingConvention = CallingConvention.Cdecl)]
  public static extern void extmain([MarshalAs(UnmanagedType.LPStr)] string namein, [MarshalAs(UnmanagedType.LPStr)] string nameout);

the function is recognized but i get an 'Access violation' when I call it in this way:

extmain("f:\\f2.glb","f:\\o.gltf");

am I missing something?

I was thinking about a string passing problem, but even if I set an hard-coded path in the source, I get the same exception.

[zeux]

Where do you get AV in? A full call stack with the DLL built in debug would be helpful. The binding and the code looks correct to me.

Oh and just to double check: I assume gltfpack.exe is a typo? You can't link to executable files (on Windows) dynamically, they are compiled in order to only work when loaded at a given address. You will need to build gltfpack.dll.

[merco]

oops... I don't know how to configure cmake vs2019 project to build a gltfpack.dll.

This way?

[zeux]

Yeah something like this should work I think.