Static Library and C ++ Platform Compatibility

Question

I recently created an old C ++ library in Visual Studio 2008. In this project, I used some class methods std::string. Now I want to use this library in a Visual Studio 2013 project.

The problem is this:
Both versions of Visual Studio use different platform tools, and the project will not compile due to linker errors, such as:

Error 4 LNK2001 errors: unresolved external character "__declspec (dllimport) public: __thiscall std :: basic_string, class std :: allocator> :: basic_string, class std :: allocator> (void)" (__imp _ ?? 0? $ Basic_string @DU? $ Char_traits @D @ stand @@ V? $ Distributor @D @ 2 @@ stand @@ QAE @XZ)

Is there a way to make the library compatible with all platform tools and use some standard classes, for example std::string?

FYI: VS2008 uses the v90 platform toolkit, and VS2013 uses the v120 platform toolkit.

Thank.

Edit:

If I use some standard methods in the library, for example std::vector, I can no longer implement the library.

It works:

unsigned int TestClass::TestMethod()
{   
    return 2;
}

It does not mean:

unsigned int TestClass::TestMethod()
{
    std::vector<unsigned char> vtest;
    vtest.push_back(0xff);

    return 2;
}

Error:

1 LNK2019: "public: static void __cdecl std:: _ String_base:: _ Xran (void)" (? _Xran @_String_base @std @@SAXXZ), "public: class :: basic_string, std:: allocator > __thiscall std:: basic_string, class std:: allocator > :: assign ( :: basic_string, std:: allocator > const &, unsigned int, unsigned int)" (? @? $Basic_string @DU? $Char_traits @D @ @@V? $ @D @2 @@ @@QAEAAV12 @ABV12 @II @Z)

RT lib /MT, whloe (/GL).

?

.

Answer 1

:

dll .

, (/GL) /MT/MD.

dll, "Dynamic Linked Library (.dll)" __declspec(dllexport) , :

#define TEST_EXPORT
#ifdef TEST_EXPORT
#define TEST __declspec(dllexport) 
#else
#define TEST __declspec(dllimport) 
#endif


class TestClass
{
public:
    std::string TEST TestMethod(); 
};

Answer 2

, , :

• (/MT /MD options)

• /GL (.. )

Answer 3

, , , :

std () . . .

, , , .

std:: ( ) , .

:

• , :

  unsigned int TestClass::TestMethod()
  {
      std::vector<unsigned char> vtest;
      vtest.push_back(0xff);
  
      return 2;
  }
  

• , + :

  unsigned int TestClass::Test2(std::vector<unsigned char> const& vparam)
  {
      vparam.push_back(0xff);
  
      return 2;
  }
  

• :

  class TestClass {
    std::vector<int> m_buffer;
    ...
  };
  

, DLL, , , , ( dllexport - .)

Note that the technical problem itself is exactly the same for a DLL as it is for a static LIB. Ie, you cannot use any types stdin the interface of your DLL / LIB, which includes at least:

• class members (even private)
• (whether you pass by value, by reference or by pointer)
• returns function values