Compiler problem ?!

This is a discussion on Compiler problem ?! within the C Programming forums, part of the General Programming Boards category; Hello, today while working on ColdFire microchip with Freescale Codewarrior 6.4 I encountered a problem. Lets say one function is ...

  1. #1
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    Compiler problem ?!

    Hello,

    today while working on ColdFire microchip with Freescale Codewarrior 6.4 I encountered a problem.
    Lets say one function is composed of other functions, and when I compile the code it seems like
    that this other functions aren't included in the output file.

    This functions are used for separating bytes from an short or a long in and to merge 2 bytes into a short and 4 bytes into a long int. The sample code could be seen below:

    Code:
    UINT16 convert_two_bytes_to_UINT16(UINT8 *bytes)
    {    UINT16 result = bytes[0];
        result <<= 8;
        result |= bytes[1];
        return result;
    }
    When I use this function in the main function, in the neverending loop the function works and the return value corresponds to the value of 2 bytes.

    I don't know what do to, so if somebody had simmilar problems I cindly ask them for some help.
    Thanks and best regards,
    BoSCHoW.

  2. #2
    Officially An Architect brewbuck's Avatar
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    You're getting the right results?

    What's the problem?

  3. #3
    "I Win!" by U. Lose vart's Avatar
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    it seems like
    that this other functions aren't included in the output file.
    And why is it seems so?
    may be it is just inlined...
    To be or not to be == true

  4. #4
    and the hat of int overfl Salem's Avatar
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    I agree with vart, maybe the optimiser has done some pruning and merging of the output file.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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  5. #5
    Officially An Architect brewbuck's Avatar
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    Quote Originally Posted by Salem View Post
    I agree with vart, maybe the optimiser has done some pruning and merging of the output file.
    The function should still exist in the object file (since some other module might refer to it) but it may not exist at all in the executable.

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