Linking problem - undefined reference to load_parameters

This is a discussion on Linking problem - undefined reference to load_parameters within the C++ Programming forums, part of the General Programming Boards category; I am having a real bad hair day today! Nothing works! Anyway, enough ranting: main.cc Code: #include <iostream> #include <global.h> ...

  1. #1
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    Linking problem - undefined reference to load_parameters

    I am having a real bad hair day today! Nothing works!

    Anyway, enough ranting:

    main.cc
    Code:
    #include <iostream>
    #include <global.h>
    ...
    int main(int argc,char *argv[])
    {
    ...
    	if(load_params(argv[1]))
    		return RET_ERR; 
    ...
    return RET_OK;
    }
    global.h
    Code:
    #ifndef _GLOBAL_H
    #define _GLOBAL_H
    
    #ifdef __cplusplus
    extern "C"
    {
    #endif
    ...
    	int load_params(char *fname);	
    ...
    #ifdef __cplusplus
    }
    #endif
    
    #endif /* _GLOBAL_H */
    param.cc
    Code:
    #include <global.h>
    ...
    inline int load_params(char *fname)
    {	return param_scenario.init(fname); 
    }
    ...
    All files compile but I get an "undefined reference to load_parameters" error. I note that load_parameters does not have () after it in the error message.

    All help appreciated. Thank you.

  2. #2
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    The problem is more likely in the makefile. Is it linking all necessary *.o files, such as param.o and main.o along with other libraries.

    Also, since you declared the function inline, you might have to move it from param.cc to param.h

  3. #3
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    Could you provide the smallest and simplest code that demonstrates the error?
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    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  4. #4
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    Quote Originally Posted by Ancient Dragon
    The problem is more likely in the makefile. Is it linking all necessary *.o files, such as param.o and main.o along with other libraries.

    Also, since you declared the function inline, you might have to move it from param.cc to param.h
    I told you it was a bad hair day - remove the inline and everything works :-)

    Thanks for the help everyone.

    Michael.

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