Qt

This is a discussion on Qt within the Linux Programming forums, part of the Platform Specific Boards category; I'm compiling a QT app the first 1 in the tutorial, I keep getting linker errors (different every time. QT ...

  1. #1
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    Angry Qt

    I'm compiling a QT app the first 1 in the tutorial, I keep getting linker errors (different every time. QT was installed from RPM with my distro and all the include files are in usr/include/qt so the install should be OK.

    the command Im typing is:
    > g++ hiworld.cpp -o world

    do I need to add anything to the command? some object files or something?

    What else could be the problem?

  2. #2
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    Join Date
    Jan 2002
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    9

    Cool QT linking

    There are almost certainly library files
    that you have to link in on the compile command line. By default, only the standard C library is included. So, to include a specific extra library, the compile command needs -l (lowercase "L" not the digit) and a few letters to tell the name of the library. For example, -lm means include the math library. Check your docs for the reference to the library for QuickTime -- I bet it's -lqt or something like that. You may need other libraries too, such as -lm -lz. Check the QT docs.....

  3. #3
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    Jan 2002
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    2
    The way you know what the -l switches are is the name of the library minus "lib" at the beginning and the suffixes. F'r instance, the math library is libm.so.whatever so you use -lm; if you want libjpeg6a.so.blabla you would use the switch -ljpeg6a and so on.

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