Unresolved external symbol error

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I am new at c++, and ;I am trying to use existing library that contains .c and .h files.This library also contain one test program.I have included all .c and .h files to my project. When i try to build my project I get the about 10 different "LNK2019: unresolved external symbol errors". maybe some one can help me figure this out.I have checked that .c and .h files contain these function i-e mzd_copy,mzd_echelonize_m4ri etc. I am using visual studio C++ .net 2008. I have uploaded my project at mediafire
http://www.mediafire.com/?6bcuo1tmg3smysc
the error i received are as follows:

Error   7   error LNK2019: unresolved external symbol _mzd_copy referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z) test_elimination.obj
Error   6   error LNK2019: unresolved external symbol _mzd_echelonize_m4ri referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z)  test_elimination.obj
Error   4   error LNK2019: unresolved external symbol _mzd_echelonize_naive referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z) test_elimination.obj
Error   3   error LNK2019: unresolved external symbol _mzd_echelonize_pluq referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z)  test_elimination.obj
Error   2   error LNK2019: unresolved external symbol _mzd_equal referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z)    test_elimination.obj
Error   1   error LNK2019: unresolved external symbol _mzd_free referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z) test_elimination.obj
Error   9   error LNK2019: unresolved external symbol _mzd_init referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z) test_elimination.obj
Error   8   error LNK2019: unresolved external symbol _mzd_randomize referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z)    test_elimination.obj
Error   5   error LNK2019: unresolved external symbol _mzd_top_echelonize_m4ri referenced in function "int __cdecl elim_test_equality(int,int)" (?elim_test_equality@@YAHHH@Z)  test_elimination.obj
Error   10  fatal error LNK1120: 9 unresolved externals C:\Users\Ishtiaq\Documents\Visual Studio 2008\Projects\test333\Debug\test333.exe

Posted 23-Feb-11 1:56am

smishtiaqhussain

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4 solutions

Solution 1

Looks like you forgot to link a library to your code.

Posted 23-Feb-11 2:01am

#realJSOP

Solution 2

Are you sure you included all the .c++ files and that the class containing the fn, _mzd_copy() has it defined in the corresponding .h files. Check whether there is any additional dependency needed, like some dll or lib. to run it.

Posted 23-Feb-11 2:04am

aravindkrgec

Solution 3

yah i am pretty sure i added all the libraries to my project. All files are .c and .h files. there are no .lib and .dll files associated.

http://www.mediafire.com/file/6bcuo1tmg3smysc/test333.rar[^]

If u aren't able to access the source project. here is the link again. :)

Thanks a bunch

Peace :)

Posted 23-Feb-11 2:38am

smishtiaqhussain

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Olivier Levrey · Accepted Answer · 2011-02-23T03:56:00

I downloaded your project and made it compile.

1- add ALL files to your solution (*.c and *.h files). Your solution only contains one .c file...
2- inline keyword cannot be used in *.c files with Visual Studio. So rename all your *.c files into *.cpp files.
3- edit the m4ri.h file and comment the __cplusplus block out.

C#

/*
#ifdef __cplusplus
extern "C" {
#endif //__cplusplus
*/
#include "permutation.h"
#include "packedmatrix.h"
#include "brilliantrussian.h"
#include "strassen.h"
#include "grayflex.h"
#include "parity.h"
#include "trsm.h"
#include "pls.h"
#include "pls_mmpf.h"
#include "solve.h"
#include "echelonform.h"
/*
#ifdef __cplusplus
}
#endif //__cplusplus
*/