Static lib question

This is a discussion on Static lib question within the Windows Programming forums, part of the Platform Specific Boards category; This is the first time I've worked with static libraries and I ran into a little problem, heres the code: ...

  1. #1
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    Aug 2003
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    288

    Static lib question

    This is the first time I've worked with static libraries and I ran into a little problem, heres the code:

    libTest.h
    Code:
    #ifndef __LIBTEST_H__
    #define __LIBTEST_H__
    
    #if _MSC_VER > 1000
    #pragma once
    #endif
    
    #pragma warning(disable: 4996)
    
    #include <string>
    
    using namespace::std;
    
    class CTest
    {
    public:
    	CTest(void);
    	~CTest(void);
    
    	int Test();
    
    private:
    	string m_sTest;
    };
    
    #endif
    libTest.cpp
    Code:
    #include "libTest.h"
    
    CTest::CTest(void)
    {
    	m_sTest = "";
    }
    
    CTest::~CTest(void)
    {
    
    }
    
    int CTest::Test()
    {
    	return m_sTest.size();
    }
    When I include/link to the libTest library on an application that already includes <string>, I get:

    1>msvcprtd.lib(MSVCP80D.dll) : error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::~basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(void)" (??1?$basic_string@DU?$char_traits@D@std@@V?$alloc ator@D@2@@std@@QAE@XZ) already defined in Main.obj

    How can I get rid of this problem? My library makes uses of strings/vectors/maps and so on and they all cause 'multiply defined symbol' errors.

    Thanks in advance for any help.

  2. #2
    Registered User
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    Aug 2003
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    Anyone have any idea?
    I've been looking through example static library sources, but none of them seem to use the stl library.

  3. #3
    carry on JaWiB's Avatar
    Join Date
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    Seattle, WA
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    Make sure your lib and your project that uses the lib match in their runtime library linkage. (Under project settings, C/C++ -> Code Generation -> Runtime Library )
    "Think not but that I know these things; or think
    I know them not: not therefore am I short
    Of knowing what I ought."
    -John Milton, Paradise Regained (1671)

    "Work hard and it might happen."
    -XSquared

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