Question about C++ and gtest: neither of which is something that i work with frequently, so forgive if this is a simple question.
I can’t seem to be able to have my tests discovered if i use extern function in any of my tests:

I work in VS 2022: I added a Google test project and referenced a C++ project under test. I am attempting to test Function1 which is defined in project under test as

#ifdef __cplusplus
extern "C" {
#endif
    __declspec(dllexport) BYTE* Function1(BYTE* obj1, int len) noexcept(false)
    {
    ...
    }

In my test project i have the following:

extern "C"
{
    extern BYTE* Function1(BYTE* obj1, int len);
}

TEST(TestCaseName, TestName)
{
        retVal = Function1(GetObj1(), GetLen());
        EXPECT_TRUE(0 == std::memcmp(retVal, GetExpectedResult(), sizeof(retVal)));
}

When I build the solution with both projects in it, i get an error in test explorer “Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again“

If I dont call Function1 in my test, the tests show up in Test Explorer

What am i doing wrong here?