Question

i’ve tried to install openCV using MAcPort, but i retrieve some errors. So i downloaded the framework folder an i added it to xcode link libraries. Now when i write my code and i build it i retrieve this error:

ld: warning: ignoring file /Volumes/OpenCV2.0/OpenCV.framework/OpenCV, missing required architecture x86_64 in file
Undefined symbols for architecture x86_64:
  "_cvCreateCameraCapture", referenced from:
      _main in main.o
  "_cvQueryFrame", referenced from:
      _main in main.o
  "_cvGetSize", referenced from:
      _main in main.o
  "_cvCreateImage", referenced from:
      _main in main.o
  "_cvCvtColor", referenced from:
      _main in main.o
  "_cvShowImage", referenced from:
      _main in main.o
  "_cvWaitKey", referenced from:
      _main in main.o
  "_cvDestroyAllWindows", referenced from:
      _main in main.o
  "_cvReleaseImage", referenced from:
      _main in main.o
  "_cvCreateHist", referenced from:
      _create_histogram_image in main.o
  "_cvGetMinMaxHistValue", referenced from:
      _create_histogram_image in main.o
  "_cvConvertScale", referenced from:
      _create_histogram_image in main.o
  "_cvSet", referenced from:
      _create_histogram_image in main.o
  "_cvGetReal1D", referenced from:
      _create_histogram_image in main.o
  "_cvRectangle", referenced from:
      _create_histogram_image in main.o
  "_cvReleaseHist", referenced from:
      _create_histogram_image in main.o
  "_cvCalcArrHist", referenced from:
      _cvCalcHist in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Have anyone had the same error? can you help me??? thanks !!

Answer 1

Are you using the GCC 4.2 compiler?
XCode4 uses LLVM by default, and openCV isn’t compatible with it (yet).
To check click on the Project, go to Build Settings, search for “compiler”.