c++ - 如何强制 MSVC 链接未使用的静态库(相当于 GCCs --whole-archive 参数)

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Answer 1

我最近在尝试将 googletest 与包含测试的库链接时遇到了同样的问题，并在他们的 primer 中发现了以下注释:

When you define your tests, Google Test creates certain static objects to register them. These objects are not referenced from elsewhere but their constructors are still supposed to run. When Visual C++ linker sees that nothing in the library is referenced from other places it throws the library out. You have to reference your library with tests from your main program to keep the linker from discarding it. Here is how to do it. Somewhere in your library code declare a function:

__declspec(dllexport) int PullInMyLibrary() { return 0; } 

If you put your tests in a static library (not DLL) then __declspec(dllexport) is not required. Now, in your main program, write a code that invokes that function:

      int PullInMyLibrary();
      static int dummy = PullInMyLibrary(); 

This will keep your tests referenced and will make them register themselves at startup.

In addition, if you define your tests in a static library, add /OPT:NOREFto your main program linker options.

虽然这可能不是有史以来最漂亮的解决方法，但这对我来说确实有效，我认为如果有更好的解决方法，他们会在入门手册中提到它。