LNK2038 mismatch detected in NativeAOT

[AhmedZero]

Description

I build the C# ObjectArx library using NativeAOT for Cad programs like C++, but the library needs two export APIs "ACRXEntryPoint" and "acrxGetApiVersion".

Reproduction Steps

in c++ uses

#if !defined(_WIN64) && !defined (_AC64)
#pragma comment(linker, "/export:_acrxGetApiVersion,PRIVATE")
#else
#pragma comment(linker, "/export:acrxGetApiVersion,PRIVATE")
#endif

I want to make it like C++ in C#

  [DllImport("rxapi", EntryPoint = "acrxGetApiVersionImpl", CallingConvention = CallingConvention.Cdecl)]
        private static extern ulong acrxGetApiVersionImpl();
        [UnmanagedCallersOnly(EntryPoint = "acrxGetApiVersion")]
        public static ulong acrxGetApiVersion()
        {
            return acrxGetApiVersionImpl();
        }

Expected behavior

it should be build successfully.

Actual behavior

rxapi.lib(libinit.obj) : warning LNK4099: PDB '' was not found with 'rxapi.lib(libinit.obj)' or at ''; linking object as if no debug info [N:\My_Projects\asdkmgPoly\asdkmgPoly\asdkmgPoly.csproj]
msvcprt.lib(nothrow.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MD_DynamicRelease' doesn't match value 'MT_StaticRelease' in Runtime.WorkstationGC.lib(thread.cpp.obj) [N:\My_Projects\asdkmg
Poly\asdkmgPoly\asdkmgPoly.csproj]

Regression?

No response

Known Workarounds

No response

Configuration

i use .NET 7.
Windows 11 X64.

Other information

No response

[ghost]

Tagging subscribers to this area: @agocke, @MichalStrehovsky, @jkotas
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Issue Details

---

Description

I build the C# ObjectArx library using NativeAOT for Cad programs like C++, but the library needs two export APIs "ACRXEntryPoint" and "acrxGetApiVersion".

Reproduction Steps

in c++ uses

#if !defined(_WIN64) && !defined (_AC64)
#pragma comment(linker, "/export:_acrxGetApiVersion,PRIVATE")
#else
#pragma comment(linker, "/export:acrxGetApiVersion,PRIVATE")
#endif

I want to make it like C++ in C#

  [DllImport("rxapi", EntryPoint = "acrxGetApiVersionImpl", CallingConvention = CallingConvention.Cdecl)]
        private static extern ulong acrxGetApiVersionImpl();
        [UnmanagedCallersOnly(EntryPoint = "acrxGetApiVersion")]
        public static ulong acrxGetApiVersion()
        {
            return acrxGetApiVersionImpl();
        }

Expected behavior

it should be build successfully.

Actual behavior

rxapi.lib(libinit.obj) : warning LNK4099: PDB '' was not found with 'rxapi.lib(libinit.obj)' or at ''; linking object as if no debug info [N:\My_Projects\asdkmgPoly\asdkmgPoly\asdkmgPoly.csproj]
msvcprt.lib(nothrow.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MD_DynamicRelease' doesn't match value 'MT_StaticRelease' in Runtime.WorkstationGC.lib(thread.cpp.obj) [N:\My_Projects\asdkmg
Poly\asdkmgPoly\asdkmgPoly.csproj]

Regression?

No response

Known Workarounds

No response

Configuration

i use .NET 7.
Windows 11 X64.

Other information

No response

Author:	AhmedZero
Assignees:	-
Labels:	area-NativeAOT-coreclr
Milestone:	-

[jkotas]

error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MD_DynamicRelease' doesn't match value 'MT_StaticRelease'

The pre-built .NET runtime libraries that are included in native AOT package are built as "static link" (https://learn.microsoft.com/en-us/cpp/c-runtime-library/crt-library-features?view=msvc-170#c-standard-library-stl-lib-files).

The error is caused by ObjectArx library built as "dynamic link" that leads to the mismatch.

Are you able to rebuild the ObjectArx library as "static link"? If you are using Visual Studio, set Properties / C/C++ / CodeGeneration / RuntimeLibrary to "Multi-threaded (/MT)" in your project file properties.

[AhmedZero]

there is no source code for ObjectArx.

[jkotas]

We do not have a great solution for this today. The potential workarounds that I can think of are:

• Link ObjectArx into a separate .dll library that will get dynamically loaded using standard DllImport by your native AOT compiled .dll.
• or, build this repo to create your own version of AOT package with matching C++ compiler options (the relevant C++ options are set here

  runtime/eng/native/configurecompiler.cmake

  Line 770 in 5eeb91f

  set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded$<$<AND:$<OR:$<CONFIG:Debug>,$<CONFIG:Checked>>,$<NOT:$<BOOL:$<TARGET_PROPERTY:DAC_COMPONENT>>>>:Debug>)

  ).

#83611 tracks adding an option for compiling the unmanaged runtime with custom C++ compiler options that would help here.

[AhmedZero]

• Link ObjectArx into a separate .dll library that will get dynamically loaded using standard DllImport by your native AOT compiled .dll.

there is no DLL for rxapi.

• or, build this repo to create your own version of AOT package with matching C++ compiler options (the relevant C++ options are set here

That solution is only available.

I hope we get a great solution in the future.

[jkotas]

there is no DLL for rxapi.

You can build it yourself.

I hope we get a great solution in the future.

+1. Resolving as duplicate of #83611

[AhmedZero]

I hope can build rxapi but there is no source code for rxapi. it's just headers and static library.

[jkotas]

You can build it from the static library:

• Create an empty .dll project
• Add .def file to the project that list the entrypoints to export from .dll (e.g. acrxGetApiVersionImpl)
• Add the rxapi static library to the linker inputs of this project.

[AhmedZero]

I understand, thanks.