compiler options

This is a discussion on compiler options within the C Programming forums, part of the General Programming Boards category; Hello. I am looking for a compiler that will produce a flat binary image, no DOS segment prefix or .exe ...

  1. #1
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    compiler options

    Hello. I am looking for a compiler that will produce a flat binary image, no DOS segment prefix or .exe info, just straight program code and data. I am running windows xp and currently use turbo c, dev-cpp, mingw, and digital mars. i have NO clue how to make any of these output this kind of file and i know it can be done in mingw, i just cant figure out how! can anyone help me?

  2. #2
    Deathray Engineer MacGyver's Avatar
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    Are you looking for assembler output or just an object file (ie. binary compiled -- but not linked -- code)? Or am I so tired I'm missing the entire point of your question?

    If you just want the code to be compiled but not linked, it's -c.

  3. #3
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    assembler output. I want the output of the compile to be a flat binary image with the extension .bin. I am trying to write code that i can boot with a boot sector i wrote, but i dont know how to run it as a .com file, so i just want to make straight binary code

  4. #4
    Deathray Engineer MacGyver's Avatar
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    I think this is slightly more advanced than just a compiler switch, but -s or -S is how to get the assembly dump in anything GCC (ie. MinGW).

  5. #5
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    You need some tool(s) that can take an existing executable, and
    • locate the code [so that all address references are resolved and correct]
    • strip off the headers etc.


    I KNOW for a fact that Linux has the ability to do this. I'm not sure if Exe2bin is able to do what you want, but it's an old DOS tool that is still distributed as part of Windows. You may want to have a google for exe2bin and see if it can help you.

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

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    But exe2bin will produce DOS binaries, won't it? It produces a .com file, right? I want a flat binary file. Am i just misunderstanding the file format here?

    Ok, i used exe2bin on a test program, and it said that it could not be converted. What can i do to convert this file?
    Last edited by xixpsychoxix; 07-25-2008 at 03:20 PM. Reason: tried using exe2bin
    HA! I WIN!

  7. #7
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    I have one more question about this whole thing, and then i swear im done. If i use the exe2bin provided with digital mars compiler, does it produce a DOS .com file, or does it produce binary code?
    HA! I WIN!

  8. #8
    Guest Sebastiani's Avatar
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    Use the -ffreestanding switch with gcc/mingw. Here is a decent overview of what you might be looking for.
    Code:
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
    {
        return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;
    }

  9. #9
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    What exactly would the output of the compiler be if I ran it on the program

    Code:
    int main ()
    {
      return 0;
    }
    with this command line option? does it still produce an executable? or is the file in another format?
    HA! I WIN!

  10. #10
    Guest Sebastiani's Avatar
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    Compilers just produce object files. That particular option merely ensures that the object file is in a format that the linker can turn into a flat binary file. The article I posted explains all that, of course...
    Code:
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
    {
        return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;
    }

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