Undefined Reference Errors Related to the Library libdc1394-devel

This is a discussion on Undefined Reference Errors Related to the Library libdc1394-devel within the Linux Programming forums, part of the Platform Specific Boards category; I have managed to eliminate all basic errors from my code and get the first stage of compiling working, but ...

  1. #1
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    Undefined Reference Errors Related to the Library libdc1394-devel

    I have managed to eliminate all basic errors from my code and get the first stage of compiling working, but when make reaches the next step I get the following errors:

    setup1394.c.text+0x3c): undefined reference to `dc1394_find_cameras'
    setup1394.c.text+0xe9): undefined reference to `dc1394_free_camera'
    setup1394.c.text+0x130): undefined reference to `dc1394_capture_setup'
    setup1394.c.text+0x185): undefined reference to `dc1394_feature_set_mode'
    setup1394.c.text+0x1ce): undefined reference to `dc1394_feature_set_value'
    setup1394.c.text+0x264): undefined reference to `dc1394_video_set_transmission'
    setup1394.c.text+0x2d8): undefined reference to `dc1394_video_get_transmission

    Now every one of the functions listed here has a prototype defined in dc1394_control.h, which is part of the libdc1394-devel libraries I downloaded through YaST. Why is it that a bunch of functions defined in libraries that I have installed are not defined in the compiler?

    Thanks for the help.

  2. #2
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    Are you actually linking against that library, e.g "gcc ... -ldc1394 "

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    Mats
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    Please don't PM me for help - and no, I don't do help over instant messengers.

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    I am linking against -ldc1394_control

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    and if you do "nm /usr/lib/libdc1394_control.a" it shows those names?

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    Please don't PM me for help - and no, I don't do help over instant messengers.

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    Looks like it does not. Those names are listed in /usr/include/libdc1394/dc1394_control.h, but do not show up under /usr/lib/libdc1394_control.a

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    I looked up the file list for libdc1394-devel package under YaST. Under file list it shows that this package installed both /usr/lib/libdc1394_control.a, that does not list the functions I posted above, and it also installed /usr/include/dc1394/dc1394_control.h, which does list all of the functions I posted above.

    Ok, I think I managed to find the functions. They are listed in a file called /usr/lib/libdc1394.a, which was also installed by the libdc1394-devel package. I just hope I can figure out to get it to link in the make file.

    Thanks for the help.
    Last edited by Phanixis; 10-09-2007 at 01:25 PM.

  7. #7
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    I believe that you should be able to link it just like I described in my first post (or something similar to it).

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    Mats
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    Please don't PM me for help - and no, I don't do help over instant messengers.

  8. #8
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    Yes, I was able to link it as you described in the first post. The only thing not linking now is a function that is part of the code.

    Thanks again.

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