[Solved] Cannot link libs statically

liimyd

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?

SGaist

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

liimyd

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.

SGaist

Then where did you get the dlls from ?

liimyd

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?

SGaist

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

liimyd

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.

SGaist

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 ?

liimyd

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.

liimyd

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!