Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. Qt Creator and other tools
  4. Linux Qt Creator compiling third party library problem

Linux Qt Creator compiling third party library problem

Scheduled Pinned Locked Moved Solved Qt Creator and other tools
5 Posts 2 Posters 1.7k Views
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • M Offline
    M Offline
    mireiner
    wrote on last edited by mireiner
    #1

    Hi there,

    I'm a Linux beginner. When compiling a project with a third party static library (.a file) with Qt Creator 4.12.4 (Qt 5.15) following errors show up:

    //libswe.a(sweph.o): undefined reference to symbol 'dladdr@@GLIBC_2.2.5'
    /lib/x86_64-linux-gnu/libdl.so.2: error adding symbols: DSO missing from command line
    collect2: error: ld returned 1 exit status

    Does anyone know what is missing and can give me some help on this?

    Thanks in advance,
    mireiner

    1 Reply Last reply
    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #4
      LIBS += -ldl
      

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      1
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #2

        Hi,

        Where does that static library come from ?
        How what is built ?
        On which distribution ?

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

        1 Reply Last reply
        0
        • M Offline
          M Offline
          mireiner
          wrote on last edited by mireiner
          #3

          Hello SGast,

          meanwhile I tried another distro - same problem. The tested distros are:

          Linux Mint 20 Cinnamon (Ubuntu based)
          Manjaro 20.03 KDE (Arch Linux based)

          On Intel i7 processor with integrated uhd 630 graphics.

          I doubt that the problem is related to the third party library. The problem is my poor understanding how to link needed Linux libraries to my Qt project.

          I took a look into a makefile that came with the third party library for testing proposes. And there is says:

          swemini: swemini.o libswe.a
          	$(CC) $(OP) -o swemini swemini.o -L. -lswe -lm -ldl
          

          Because I didn't include the last two Linux libraries -lm -ldl that might be the cause of the errors. But I don't know how to do that.

          Do you know these Linux libraries and how to include them into an Qt Creator project?

          1 Reply Last reply
          0
          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #4
            LIBS += -ldl
            

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

            1 Reply Last reply
            1
            • M Offline
              M Offline
              mireiner
              wrote on last edited by mireiner
              #5

              Yes, problem solved.
              I'm a bit ashamed that it was so simple and I tried so hard and didn't get it.

              Thank you very much SGaist!

              1 Reply Last reply
              1

              • Login

              • Login or register to search.
              • First post
                Last post
              0
              • Categories
              • Recent
              • Tags
              • Popular
              • Users
              • Groups
              • Search
              • Get Qt Extensions
              • Unsolved