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How to install Boost library? How to add library to project?

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  • A Offline
    A Offline
    aret777
    wrote on last edited by
    #13

    Well, I tried to insert library headers, but it says "no such file or directory"
    image2.png

    mzimmersM 1 Reply Last reply
    0
    • A aret777

      Well, I tried to insert library headers, but it says "no such file or directory"
      image2.png

      mzimmersM Offline
      mzimmersM Offline
      mzimmers
      wrote on last edited by
      #14

      @aret777 OK, that's because you added the library (the .so/.a) file, but you didn't add an entry for the header files.

      I have to log off now (Christmas dinner!), but I'll try to check in later. Another entry to your .pro file should get you there.

      1 Reply Last reply
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      • A Offline
        A Offline
        aret777
        wrote on last edited by
        #15

        Well, I tried different approaches, different paths, but seems I am doing something wrong
        Screenshot_1.png
        Or "Another entry to my .pro file" means something different?

        mzimmersM 1 Reply Last reply
        0
        • A aret777

          Well, I tried different approaches, different paths, but seems I am doing something wrong
          Screenshot_1.png
          Or "Another entry to my .pro file" means something different?

          mzimmersM Offline
          mzimmersM Offline
          mzimmers
          wrote on last edited by
          #16

          @aret777 sorry I wasn't clear. From what I can se, you need to do the following:

          1. remove the 2nd LIBS line
          2. remove whatever line is causing your Boost project file to show up.
          3. Add a line like this:
          INCLUDEPATH += /home/user/Documents/BoostLibrary
          
          A 1 Reply Last reply
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          • mzimmersM mzimmers

            @aret777 sorry I wasn't clear. From what I can se, you need to do the following:

            1. remove the 2nd LIBS line
            2. remove whatever line is causing your Boost project file to show up.
            3. Add a line like this:
            INCLUDEPATH += /home/user/Documents/BoostLibrary
            
            A Offline
            A Offline
            aret777
            wrote on last edited by aret777
            #17

            @mzimmers
            like this? I compile, nothing changes
            error.png

            Or, maybe... I dont need to add .hpp file to include library to project? But I tried now to include .so and .a files - no effect...

            Edit: I found the way to include .hpp files! But it gaves other errors...
            error2.png

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            • mzimmersM Offline
              mzimmersM Offline
              mzimmers
              wrote on last edited by mzimmers
              #18

              No, something's still wrong with your .pro file. You need to get rid of that entry for the BoostLinkingTest.pro file.

              EDIT:
              disregard that last line.

              May I see the complete contents of your .pro file?

              A 1 Reply Last reply
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              • mzimmersM mzimmers

                No, something's still wrong with your .pro file. You need to get rid of that entry for the BoostLinkingTest.pro file.

                EDIT:
                disregard that last line.

                May I see the complete contents of your .pro file?

                A Offline
                A Offline
                aret777
                wrote on last edited by
                #19

                @mzimmers Its same from the beggining. I created now new project just for test, but same errors:
                Screenshot_1.png

                1 Reply Last reply
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                • mzimmersM Offline
                  mzimmersM Offline
                  mzimmers
                  wrote on last edited by mzimmers
                  #20

                  My bad...I gave you bad advice on the LIBS entry. You need to specify the full path to the library you want to use. There may be a way to wildcard that; I'll do some looking. In the meantime, if you know specifically which boost libraries you need, modify your LIBS entry to contain the full path to those libraries.

                  EDIT:

                  Look at the LIBS entry on this page for how to explicitly add libraries to your project.

                  A 1 Reply Last reply
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                  • mzimmersM mzimmers

                    My bad...I gave you bad advice on the LIBS entry. You need to specify the full path to the library you want to use. There may be a way to wildcard that; I'll do some looking. In the meantime, if you know specifically which boost libraries you need, modify your LIBS entry to contain the full path to those libraries.

                    EDIT:

                    Look at the LIBS entry on this page for how to explicitly add libraries to your project.

                    A Offline
                    A Offline
                    aret777
                    wrote on last edited by
                    #21

                    @mzimmers Okay, if it will work, its fine.
                    But what file I need then to add to LIBS?
                    Screenshot_2.png
                    LIBS += /home/user/Documents/BoostLibrary/stage/lib/libboost_program_options.a
                    LIBS += /home/user/Documents/BoostLibrary/stage/lib/libboost_program_options.so
                    LIBS += /home/user/Documents/BoostLibrary/stage/lib/libboost_program_options.so.1.81.0
                    And, how to link 2 libraries? Just to repeat LIBS+= "path" again?

                    And just for curiosity - I am doing tutorial with that boost library, it says:

                    Remember that the Boost.ProgramOptions library consists of more than just header files, so
                    Therefore, your program must link with the libboost_program_options library.

                    We did linkage?

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                    • mzimmersM Offline
                      mzimmersM Offline
                      mzimmers
                      wrote on last edited by mzimmers
                      #22

                      You should only need one of those libraries. I'm working from memory, so you might want to double-check me, but an .so library is a dynamic library, while a .a is a static library. The one with a specific version number appears to be the actual library, while libboost_program_options.so is a link (so when you update boost, you don't have to rebuild your project. I'd use the link in your LIBS statement.

                      When you want to add multiple libraries, you can either have multiple LIBS statements (just remember to use "+=" or the second LIBS statement will undo the first), or you can concatenate the needed libs in one LIBS statement.

                      A 1 Reply Last reply
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                      • mzimmersM mzimmers

                        You should only need one of those libraries. I'm working from memory, so you might want to double-check me, but an .so library is a dynamic library, while a .a is a static library. The one with a specific version number appears to be the actual library, while libboost_program_options.so is a link (so when you update boost, you don't have to rebuild your project. I'd use the link in your LIBS statement.

                        When you want to add multiple libraries, you can either have multiple LIBS statements (just remember to use "+=" or the second LIBS statement will undo the first), or you can concatenate the needed libs in one LIBS statement.

                        A Offline
                        A Offline
                        aret777
                        wrote on last edited by aret777
                        #23

                        @mzimmers Thanks a lot.
                        But now I get other error:
                        download.png

                        I tried to google, found this:
                        https://stackoverflow.com/questions/36090824/trouble-using-boost-cannot-open-shared-object-file
                        https://forum.qt.io/topic/58963/error-while-loading-shared-libraries-cannot-open-shared-object-file-no-such-file-or-directory/3
                        Screenshot_3.png
                        but adding this flags from solutions doesnt work... (however, advices are very old, more than 6 years passed...)

                        1 Reply Last reply
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                        • mzimmersM Offline
                          mzimmersM Offline
                          mzimmers
                          wrote on last edited by
                          #24

                          Interesting. We're getting away from my area of expertise -- it's been awhile since I've developed for Linux -- so I'm not sure how much help I'll be.

                          Looking at the link you provided...I wonder if you need to use this variable. I don't remember having to use it back when I did use Qt for Linux, but who knows.

                          Maybe someone more knowledgable than I can chime in here.

                          1 Reply Last reply
                          1
                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #25

                            Hi,

                            You can define the LD_LIBRARY_PATH environment variable in the Run part of the project panel and point it to where your boost libraries are.

                            One question though: why not use the boost libraries from your Linux distribution ?

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

                            A 1 Reply Last reply
                            0
                            • SGaistS SGaist

                              Hi,

                              You can define the LD_LIBRARY_PATH environment variable in the Run part of the project panel and point it to where your boost libraries are.

                              One question though: why not use the boost libraries from your Linux distribution ?

                              A Offline
                              A Offline
                              aret777
                              wrote on last edited by
                              #26

                              @SGaist And what I need to do here?
                              Screenshot_4.png

                              One question though: why not use the boost libraries from your Linux distribution ?
                              Because I am newbie, obviuos steps when you need a library - download it from library site.
                              If it will be easier to use them from Linux and link them to projects in Qt - awesome!

                              1 Reply Last reply
                              0
                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #27

                                See the environment block ? That's what you need to change.

                                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
                                • A Offline
                                  A Offline
                                  aret777
                                  wrote on last edited by aret777
                                  #28

                                  Humm, I already have this variable and it doesnt permit set another one (LD_LIBRARY_PATH)
                                  I tried to set variable in analogue with others... but it changed nothing in compiler errors.
                                  Screenshot_2.png

                                  1 Reply Last reply
                                  0
                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #29

                                    The error you show is a run time error not a compiler error.

                                    Where exactly is that library located ?

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

                                    mzimmersM 1 Reply Last reply
                                    0
                                    • SGaistS SGaist

                                      The error you show is a run time error not a compiler error.

                                      Where exactly is that library located ?

                                      mzimmersM Offline
                                      mzimmersM Offline
                                      mzimmers
                                      wrote on last edited by
                                      #30

                                      @SGaist according to the console read-out in the first post, it appears that library is located at: /home/user/Documents/BoostLibrary/stage/lib, which is indeed part of the definition of LD_LIBRARY_PATH.

                                      SGaistS 1 Reply Last reply
                                      0
                                      • mzimmersM mzimmers

                                        @SGaist according to the console read-out in the first post, it appears that library is located at: /home/user/Documents/BoostLibrary/stage/lib, which is indeed part of the definition of LD_LIBRARY_PATH.

                                        SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #31

                                        @mzimmers good point, I have misread that part.

                                        Second thing I would do is run ldd to see what it has to say and the first would be to switch to the distribution provided boost if recent enough.

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

                                        mzimmersM 1 Reply Last reply
                                        0
                                        • SGaistS SGaist

                                          @mzimmers good point, I have misread that part.

                                          Second thing I would do is run ldd to see what it has to say and the first would be to switch to the distribution provided boost if recent enough.

                                          mzimmersM Offline
                                          mzimmersM Offline
                                          mzimmers
                                          wrote on last edited by
                                          #32

                                          @SGaist agreed, but (IMO) it's still worth knowing why this isn't working for him. At this point, it seems like he's done everything necessary.

                                          BTW: when did Linux distros begin including Boost?

                                          1 Reply Last reply
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