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.NET Forum / Languages / C# / April 2008Linking Mixed Mode and Managed Assemblies
I have a managed C++ project and two C# projects. All are class library projects. The C++ project links with native C++ static libraries and references to one C# project. The projects structure goes something like this. Proj2_MCPP --(references)--> Proj1_CSharp Proj3_CSharp --(references)--> Proj2_MCPP and Proj1_CSharp My objective is to link the DLLs produced by the 3 projects into a single DLL. I tried the following scenario. 1. csc Proj1_CSharp into a netmodule 2. cl Proj2_MCPP with /LN and /clr:oldSyntax switch to produce .obj files 3. csc Proj3_CSharp with /AddModule option and use .netmodule and .obj files as input 4. Link 1, 2 and 3 into a dll. and I also tried this. 1. csc Proj1_CSharp into a netmodule 2. Build Proj2_MCPP from VS.NET 2005 (based on http://support.microsoft.com/kb/309805) to produce .netmodule and obj .files. 3. csc Proj3_CSharp with /AddModule option and use .netmodule and .obj files as input 4. Link 1, 2 and 3 into a dll. I never managed to reach step 4. I just stuck with error messages resulted from step 3. Am I doing the right thing? Or it is just not possible? Thanks - Henry Class library projects are DLLs. You can't directly link DLLs together into a new DLL. You could try a utility called ILMerge [1]; but I haven't tried it with mixed-mode DLLs. [1] http://research.microsoft.com/~mbarnett/ILMerge.aspx  SignatureBrowse http://connect.microsoft.com/VisualStudio/feedback/ and vote. http://www.peterRitchie.com/blog/ Microsoft MVP, Visual Developer - Visual C# > I have a managed C++ project and two C# projects. All are class library > projects. The C++ project links with native C++ static libraries and [quoted text clipped - 26 lines] > > Thanks - Henry Thanks, Peter. I read somewhere that ILMerge, and Al.exe, only work for pure managed assemblies, but don't support mixed mode DLLs containing both managed and unmanaged code. I dropped them from my list. Right now I am looking at using CSharp compiler and VC++ linker. I've seen in internet newsgroups some people got it working successfully. My CSharp compiler is complaining that some classes are defined multiple times. Obviously, I am still missing something - probably simple. -- Henry > Class library projects are DLLs. You can't directly link DLLs together into > a new DLL. [quoted text clipped - 34 lines] > > > > Thanks - Henry Visual Studio doesn't support them, but compiling to netmodules could then be linked together as an assembly using Assembly Linker (al.exe). I'm not sure how to get c++ compiler to generate netmodules... SignatureBrowse http://connect.microsoft.com/VisualStudio/feedback/ and vote. http://www.peterRitchie.com/blog/ Microsoft MVP, Visual Developer - Visual C# > Thanks, Peter. I read somewhere that ILMerge, and Al.exe, only work for pure > managed assemblies, but don't support mixed mode DLLs containing both managed [quoted text clipped - 45 lines] > > > > > > Thanks - Henry Here's what I've been able to do: csc /target:module cstest.cs cl /clr:pure /FUSystem.dll /LN cpptest.cpp al /platform:x86 /t:lib /out:test.dll cpptest.netmodule cstest.netmodule This generates a dll (test.dll) that contains the two netmodules. When I added to another C# project as a reference I was able to add managed types from both netmodules. SignatureBrowse http://connect.microsoft.com/VisualStudio/feedback/ and vote. http://www.peterRitchie.com/blog/ Microsoft MVP, Visual Developer - Visual C# > Thanks, Peter. I read somewhere that ILMerge, and Al.exe, only work for pure > managed assemblies, but don't support mixed mode DLLs containing both managed [quoted text clipped - 45 lines] > > > > > > Thanks - Henry Hi Henry, I have added a reply to you in microsoft.public.dotnet.languages.vc newsgroup, please feel free to check it there, thanks. Best regards, Jeffrey Tan Microsoft Online Community Support ========================================= Delighting our customers is our #1 priority. We welcome your comments and suggestions about how we can improve the support we provide to you. Please feel free to let my manager know what you think of the level of service provided. You can send feedback directly to my manager at: msdnmg@microsoft.com. This posting is provided "AS IS" with no warranties, and confers no rights. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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