Thread: Calling c object file into c source file

  1. 11-30-2010 #1
    prabu
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    Calling c object file into c source file

    Hi experts,,


    Im a new comer . I'm in situation to develop one c program .

    My scenario is

    I had one C object file(eg. sample.o) that contains some functions implementation and some more. now i need to call this object file into c file , Is it possible?? or Can i include in header file , through header file , Can i include in C source file.?? Is it possible?? , or any other way. But i don't have sample.o 's source file. What i want to do for acheieve this. I googled and read some articles . Not yet get solution.. Can some help me. thanks a lot.

    Regards

    R Prabu
  2. 11-30-2010 #2
    CommonTater
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    Object files are intermediate files. When you compile a C file, you get an object file... when you link your project, it combines one or more object files into an executable file, a DLL or a library file. Without a list of exports (known during compile) I don't think you'll make much use of it.
  3. 11-30-2010 #3
    prabu
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    Calling c object file into c

    Hi


    Can you explain little more brief??
  4. 11-30-2010 #4
    Bayint Naung
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    Compiling and Linking - Cprogramming.com
    You don't look like using gcc C compiler. Anyway I think it'd still be useful. http://www.network-theory.co.uk/docs/gccintro/
  5. 11-30-2010 #5
    CommonTater
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    Quote Originally Posted by prabu View Post
    Hi


    Can you explain little more brief??
    Ok... can't be done.
  6. 11-30-2010 #6
    Salem
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    In your main.c
    Code:
    extern int someFunctionInSample_dot_o();
int main ( ) {
  someFunctionInSample_dot_o();
  return 0;
}
    Then it's just
    gcc main.c sample.o

    This only really works if sample.o was compiled with the same compiler, for the same OS.

    You can't use it to link with any random object file you might have found.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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