CODEWITHSUNDEEP
c++visual-studio-2015linkerprotocol-buffers
tobspr
tobspr

Reputation: 8376

Failed to link with standard library

I'm trying to link libprotobuf to my project. In order to do that, I already compiled libprotobuf to a dynamic libray, which is on my library path.

However, when compiling with /MD, I get the following error from the linker:

 3>libprotobuf.lib(int128.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MT_StaticRelease' doesn't match value 'MD_DynamicRelease' in component.obj [C:\Projekte\P3D-ECS\p3d_e

So, I changed the flag from /MD to /MT, and those disappeared. However, now the linker is failing to link the standard library, and cannot find symbols like std::basic_ostream, with a lot of errors like this:

error LNK2001: unresolved external symbol "__declspec(dllimport) public: __int64 __cdecl std::basic_streambuf<char,struct std::char_traits<char> >::sputn(char const *,__int64)" (__imp_?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAA_JPEBD_J@Z)

I have already tried adding libcmt and MSVCRT to my linker dependencies, without success.

It seems that my DLL simply fails to compile with the /MT flag, regardless of linking libprotobuf or not. What am I missing?

Upvotes: 1

Views: 322

Answers (1)

tobspr
tobspr

Reputation: 8376

After reading through the protobuf CMakeLists, I found the following solution:

-Dprotobuf_MSVC_STATIC_RUNTIME=OFF

Had to be passed to the cmake command, to make protobuf use /MD instead of /MT.

Upvotes: 1

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