global constructor initialization warning

Question

MSVC compiler not generating warning for global constructor initialization. We want to disable global constructor initialization before main. So basically lets say I have a UDT and I want to make sure that this type/class does not gets initiated before main, what should I do using. Basically we want to have some warning for below code usage.

class MyClass {

public:

MyClass ()
    {
        number=100;
    }

private:

int  number;
};

MyClass x;  //this should generate global constructor initialization warning . 

int main()
{

return 0;
}

We tried to compile above code using MSVC compiler and with "/Wall " flag but it did not generate any warning.

if we compile same code with Clang with “-Wglobal-constructors” compiler option, it gives us below warning.

/Users/mohsin.siddiqui/Workspace/source.cpp:21:9: warning: declaration requires a global constructor [-Wglobal-constructors] MyClass x;

Does this means that MSVC does not even have this warning supported ?

Answer 1

In your Visual Studio project, if you enable clang-tidy checking in the code analysis settings you should get this warning:
warning G344A74EF: declaration requires a global constructor [clang-diagnostic-global-constructors]