Error linking source file with static library C++

Question

I'm trying to use the static library however when I add the reference and include directories to the project I get strange compiler errors, this including only any header file.

The static library project builds successful. I don't know where the error may be, but I suppose it may be in some file of the static library.

The static library files are the following:

header:

#ifndef UTIL_H_
#define UTIL_H_

#include <string>
#include <iostream>
#include <vector>
#include <stdlib.h>

namespace Kaczmarz {

class Util {
public:
    Util();
    static void split(std::vector<std::string> &tokens, const std::string &text, char sep);
    static double random(int rangeMin,int rangeMax);

    virtual ~Util();
};

} 
#endif

cpp:

#include "Util.h"

namespace Kaczmarz {

Util::Util() {
    // TODO Auto-generated constructor stub
}

void Util::split(std::vector<std::string> &tokens, const std::string &text, char sep) {
    unsigned int start = 0, end = 0;
    while ((end = text.find(sep, start)) != std::string::npos) {
        tokens.push_back(text.substr(start, end - start));
        start = end + 1;
    }
    tokens.push_back(text.substr(start));
}

double Util::random(int rangeMin,int rangeMax){
    return (double) static_cast<double>( rand() ) * rangeMax / static_cast<double>( RAND_MAX ) + rangeMin;
}


Util::~Util() {
    // TODO Auto-generated destructor stub
}

}

the file that tries to use the static library:

#include <iostream>

using namespace std;
//using namespace Kaczmarz;

int main(){
    cout << "Started.." << endl;
    return 0;
}

Note that I'm not calling yet any function from the library.

The errors that I got are the following:

1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21): error C2143: syntax error : missing ';' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21): error C2433: 'basic_string' : 'inline' not permitted on data declarations
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21): error C2988: unrecognizable template declaration/definition
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21): error C2059: syntax error : '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(38): error C2143: syntax error : missing ';' before '{'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(38): error C2447: '{' : missing function header (old-style formal list?)
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(49): error C2143: syntax error : missing ';' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(49): error C2433: 'basic_string' : 'inline' not permitted on data declarations
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(49): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(49): error C2086: 'int std::basic_string' : redefinition
1>          c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21) : see declaration of 'std::basic_string'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(49): error C2988: unrecognizable template declaration/definition
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(49): error C2059: syntax error : '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(66): error C2143: syntax error : missing ';' before '{'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(66): error C2447: '{' : missing function header (old-style formal list?)
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(77): error C2143: syntax error : missing ';' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(77): error C2433: 'basic_string' : 'inline' not permitted on data declarations
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(77): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(77): error C2086: 'int std::basic_string' : redefinition
1>          c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21) : see declaration of 'std::basic_string'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(77): error C2988: unrecognizable template declaration/definition
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(77): error C2059: syntax error : '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(94): error C2143: syntax error : missing ';' before '{'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(94): error C2447: '{' : missing function header (old-style formal list?)
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(101): error C2143: syntax error : missing ';' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(101): error C2433: 'basic_string' : 'inline' not permitted on data declarations
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(101): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(101): error C2086: 'int std::basic_string' : redefinition
1>          c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21) : see declaration of 'std::basic_string'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(101): error C2988: unrecognizable template declaration/definition
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(101): error C2059: syntax error : '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(114): error C2143: syntax error : missing ';' before '{'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(114): error C2447: '{' : missing function header (old-style formal list?)
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(125): error C2143: syntax error : missing ';' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(125): error C2433: 'basic_string' : 'inline' not permitted on data declarations
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(125): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(125): error C2086: 'int std::basic_string' : redefinition
1>          c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21) : see declaration of 'std::basic_string'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(125): error C2988: unrecognizable template declaration/definition
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(125): error C2059: syntax error : '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(138): error C2143: syntax error : missing ';' before '{'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(138): error C2447: '{' : missing function header (old-style formal list?)
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(145): error C2143: syntax error : missing ';' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(145): error C2433: 'basic_string' : 'inline' not permitted on data declarations
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(145): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(145): error C2086: 'int std::basic_string' : redefinition
1>          c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(21) : see declaration of 'std::basic_string'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(145): error C2988: unrecognizable template declaration/definition
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(145): error C2059: syntax error : '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(158): error C2143: syntax error : missing ';' before '{'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(158): error C2447: '{' : missing function header (old-style formal list?)
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(166): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(166): error C2143: syntax error : missing ',' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(170): error C2803: 'operator ==' must have at least one formal parameter of class type
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(170): error C2805: binary 'operator ==' has too few parameters
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(177): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(177): error C2143: syntax error : missing ',' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(180): error C2803: 'operator ==' must have at least one formal parameter of class type
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(186): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(186): error C2143: syntax error : missing ',' before '<'
1>c:\program files (x86)\microsoft visual studio 11.0\vc\include\string(190): fatal error C1903: unable to recover from previous error(s); stopping compilation

Note that the errors mention the std string class.

Answer 1

Ok found the cause of this compiling errors.

In the "additional include directories" (vs 2012) I had another .cpp/.h files which imported "Util" class.

I just removed this files from the directory and this time it compiled good without any errors. Note that this files weren't present in the project (I had excluded them), however seems that "additional include directories" linked them somehow in the project.

Thanks to all who have answered, I really appreciate it.

Answer 2

Since it's Christmas time and I see that you're using MSVS, here are steps that I did to try your library:

Step 1: I have created new solution called XmasTest with new Win32 project in it called XmasLib.

Step 2: I have added your source files in that project, just a simple example-appropriate modification. I have even let that evil using namespace std; line in the header file.

Util.h

#ifndef UTIL_H_
#define UTIL_H_

#include <string>
#include <iostream>
#include <vector>
#include <stdlib.h>

using namespace std;

namespace Kaczmarz {

class Util {
public:
    Util();
    static void print();

    virtual ~Util();
};

} /* namespace Kaczmarz */
#endif

Util.cpp

#include "Util.h"
using namespace std;

namespace Kaczmarz {

Util::Util() {
    // TODO Auto-generated constructor stub

}

void Util::print() {
    cout << "Util::print() works! yay!" << endl;
}

Util::~Util() {
}

} /* namespace Kaczmarz */

Step 3: I have created new Win32 Console application called XmasLibTestApp with following code in it:

#include <iostream>

#include "../XmasLib/Util.h"

using namespace std;
using namespace Kaczmarz;

int main(){
    Util u;
    u.print();
    return 0;
}

Step 4: Since these are 2 projects within 1 solution, I have handled the dependency in the following way:

1. Linker->General->Additional Library Directories: $(OutDir)
2. Linker->Input->Additional Dependencies: XmasLib.lib
3. Solution Properties->ProjectDependencies: App depends on lib

Step 5: Build Solution and run app. Output: Util::print() works! yay!

And that's it. End of the story, everything works, developer rejoices with his IDE.

Happy Xmas! :D

---

PS: Questions that are worth to have a look at:
Why is "using namespace std" considered bad practice?
What requires me to declare "using namespace std;"?
where to put using namespace std;