Using FlyCapture SDK with Qt Creator
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I am usign Windows 7, Qt Creator 4.4.1 (x32) and FlyCapture SDK 2.11.3.425. The problem is that I keep getting linking errors when trying to use the FlyCapture Library.
I have boiled down the problem to a simple program. The SDK main path is C:/PointGrey
main.cpp
#include <FlyCapture2.h> using namespace FlyCapture2; int main() { Camera camera; return 0; }SOURCES += main.cpp INCLUDEPATH += C:\PointGrey\include LIBS += -L$$PWD/../../../../../PointGrey/lib/ -lFlyCapture2 LIBS += C:/PointGrey/bin/FlyCapture2GUI_C_v110.dllThese are the errors:
C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraC1Ev' C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraD1Ev' C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraD1Ev' collect2.exe:-1: error: error: ld returned 1 exit statusSo, how can I use FlyCapture SDK with Qt creator? Am I missing some .dll? Is FlyCapture only compatible with Visual Studio?
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I am usign Windows 7, Qt Creator 4.4.1 (x32) and FlyCapture SDK 2.11.3.425. The problem is that I keep getting linking errors when trying to use the FlyCapture Library.
I have boiled down the problem to a simple program. The SDK main path is C:/PointGrey
main.cpp
#include <FlyCapture2.h> using namespace FlyCapture2; int main() { Camera camera; return 0; }SOURCES += main.cpp INCLUDEPATH += C:\PointGrey\include LIBS += -L$$PWD/../../../../../PointGrey/lib/ -lFlyCapture2 LIBS += C:/PointGrey/bin/FlyCapture2GUI_C_v110.dllThese are the errors:
C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraC1Ev' C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraD1Ev' C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraD1Ev' collect2.exe:-1: error: error: ld returned 1 exit statusSo, how can I use FlyCapture SDK with Qt creator? Am I missing some .dll? Is FlyCapture only compatible with Visual Studio?
Hi @gMatos,
First question: Which compiler was used to compile the FlyCapture library? It has to match your compiler, i.e. you cannot mix MinGW and Visual C++.
LIBS += -L$$PWD/../../../../../PointGrey/lib/ -lFlyCapture2That line looks good, but please check the path! If the number of `..` is incorrect, the linker will not find the library. Note that it may be necessary to link against more libraries, not only FlyCapture2. > ``` > C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraC1Ev' Further note: Avoid directories and file names with spaces. That may lead to hard-to-track errors. > Am I missing some .dll? At the link stage, no. At this stage the .lib or .a files are needed. The dll is needed at runtime. > Is FlyCapture only compatible with Visual Studio? As said above, if FlyCapture was compiled with Visual C++, then yes. -
Hi @gMatos,
First question: Which compiler was used to compile the FlyCapture library? It has to match your compiler, i.e. you cannot mix MinGW and Visual C++.
LIBS += -L$$PWD/../../../../../PointGrey/lib/ -lFlyCapture2That line looks good, but please check the path! If the number of `..` is incorrect, the linker will not find the library. Note that it may be necessary to link against more libraries, not only FlyCapture2. > ``` > C:\Users\Gabriel\Desktop\Qt Basic\FlyCaptureApp\main.cpp:8: error: undefined reference to `_imp___ZN11FlyCapture26CameraC1Ev' Further note: Avoid directories and file names with spaces. That may lead to hard-to-track errors. > Am I missing some .dll? At the link stage, no. At this stage the .lib or .a files are needed. The dll is needed at runtime. > Is FlyCapture only compatible with Visual Studio? As said above, if FlyCapture was compiled with Visual C++, then yes.
