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  4. [Solved] Cannot link libs statically
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[Solved] Cannot link libs statically

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #12

    You don't link to dlls you link to lib files, where are these located ?

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

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    • L Offline
      L Offline
      liimyd
      wrote on last edited by
      #13

      Ahhhhhhhh I see... :(
      Yes, those should be in C:\Programs\opencv\build\x86\vc12\staticlib

      Now I know why the folder was called "staticlib"... I will try this later! Thank you!!

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #14

        Not so fast ! Since you have dlls you probably have a second set of these in another folder. On Windows, the static libraries and the import libraries have the same extension...

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

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        • L Offline
          L Offline
          liimyd
          wrote on last edited by
          #15

          I can't find another folder containing the libs (neither in the original opencv folders, nor in the folders created by CMake), and as you predicted, the libraries in staticlib didn't work. Where can I go from here?

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #16

            I just realized: C:\Programs\opencv\build\x86\vc12\staticlib
            That means that these libs are for Visual Studio not MinGW

            Unless you built OpenCV yourself, just grab the archive again

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

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            • L Offline
              L Offline
              liimyd
              wrote on last edited by
              #17

              Sorry, I don't quite understand. After I re-downloaded the package for opencv 3.0, I only had files with a .lib extension in the staticlib folder, which you already said not to use, and in C:\Programs\opencv\build\x86\vc12\lib, which only has opencv_ts300 and opencv_world300 (I don't know how to use these). I can't seem to find any other .lib files.

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #18

                Then where did you get the dlls from ?

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

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                • L Offline
                  L Offline
                  liimyd
                  wrote on last edited by
                  #19

                  The dlls were created with cmake, but I couldn't find the regular libraries from the cmake-generated folders. Do I have to rebuild opencv with cmake? I was using the cmake-gui and there were a lot of different options that I could check or uncheck. Maybe some of them will build the regular libraries?

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #20

                    If the dlls were created with cmake then you already built it by hand so you should have the corresponding lib files somewhere

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

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                    • L Offline
                      L Offline
                      liimyd
                      wrote on last edited by liimyd
                      #21

                      I rebuilt opencv, this time with BUILD_SHARED_LIBS = Off, which made .a files.
                      I read that .a files are the same as .lib files.
                      My .pro file now looks like this:

                      INCLUDEPATH += C:\\Programs\\opencvMinGW5\\install\\include
                      
                      LIBS += -LC:\\Programs\\opencvMinGW5\\install\\x64\\mingw\\staticlib \
                      -lopencv_core300 \
                      -lopencv_highgui300 \
                      -lopencv_imgcodecs300 \
                      -lopencv_imgproc300 \
                      -lzlib \
                      -lIlmImf
                      

                      I have a few compilation errors, and I wasn't able to google them, do you know what they mean?

                      g++ -static -static-libgcc -Wl,-s -Wl,-subsystem,windows -mthreads -o release\blood_visual.exe release/main.o release/mainwindow.o release/contours.o release/edge.o release/blood_visual_plugin_import.o release/moc_mainwindow.o release/moc_contours.o release/moc_edge.o -lmingw32 -LC:/Qt/Static/5.3/lib -lqtmain -LC:\Programs\opencvMinGW5\install\x64\mingw\staticlib -lopencv_core300 -lopencv_highgui300 -lopencv_imgcodecs300 -lopencv_imgproc300 -lzlib -lIlmImf -LC:/Qt/Static/5.3/plugins/accessible -lqtaccessiblewidgets -lQt5Widgets -LC:/Qt/Static/5.3/plugins/platforms -lqwindows -lwinspool -lshlwapi -lQt5PlatformSupport -LC:/Qt/Static/5.3/plugins/imageformats -lqdds -lqicns -lqico -lqjp2 -lqmng -lqtga -lqtiff -lqwbmp -lqwebp -lQt5Gui -lcomdlg32 -loleaut32 -limm32 -lwinmm -lglu32 -lopengl32 -lgdi32 -lQt5Core -lole32 -luuid -lws2_32 -ladvapi32 -lshell32 -luser32 -lkernel32

                      C:\Programs\opencvMinGW5\install\x64\mingw\staticlib\libopencv_highgui300.a(window_w32.cpp.obj):window_w32.cpp:(.text$ZL17icvCreateTrackbarPKcS0_PiiPFviEPFviPvES4+0x62f): undefined reference to `_imp__CreateToolbarEx@52'

                      C:\Programs\opencvMinGW5\install\x64\mingw\staticlib\libopencv_imgproc300.a(imgwarp.cpp.obj):imgwarp.cpp:(.text$cvLogPolar+0x68b): undefined reference to `cvCartToPolar'

                      C:\Programs\opencvMinGW5\install\x64\mingw\staticlib\libopencv_imgproc300.a(imgwarp.cpp.obj):imgwarp.cpp:(.text$cvLogPolar+0x6c9): undefined reference to `cvLog'

                      C:/Qt/Tools/mingw491_32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bin/ld.exe: C:\Programs\opencvMinGW5\install\x64\mingw\staticlib\libopencv_imgproc300.a(imgwarp.cpp.obj): bad reloc address 0x6c9 in section `.text$cvLogPolar'

                      I think I might be missing some static libs or maybe the order I'm listing the libs is wrong.

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #22

                        There's something not clear, I see MinGW5 in your OpenCV path and Qt uses 4.9.1, which one did you use to build OpenCV ?

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

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                        • L Offline
                          L Offline
                          liimyd
                          wrote on last edited by liimyd
                          #23

                          OpenCVMinGW5 is just the name of the folder for my Cmake files (my sad 5th attempt at building OpenCV). I used 4.9.1 to build. Sorry for the confusion.

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                          • L Offline
                            L Offline
                            liimyd
                            wrote on last edited by
                            #24

                            Hi, I'm still looking for help with this; I was wondering if you had any suggestions. Thank you for your help so far though!

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