我正在尝试使用opencv_contributions构建opencv，但我无法在构建时弄清楚这个错误。
我做了这样的cmake：
cmake -DOPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-master/modules/ ~/opencv-3.2.0/
在建筑结束时我收到了这个错误：
[100%] Linking CXX executable ../../bin/opencv_perf_stitching
[100%] Built target opencv_perf_stitching
[100%] Linking CXX shared module ../../lib/cv2.so
/usr/bin/ld: CMakeFiles/opencv_python2.dir/__/src2/cv2.cpp.o: relocation R_X86_64_PC32 against undefined symbol `_Z13pyopencv_fromIN2cv4MatxIdLi4ELi4EEEEP7_objectRKT_' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
modules/python2/CMakeFiles/opencv_python2.dir/build.make:393: recipe for target 'lib/cv2.so' failed
make[2]: *** [lib/cv2.so] Error 1
CMakeFiles/Makefile2:14221: recipe for target 'modules/python2/CMakeFiles/opencv_python2.dir/all' failed
make[1]: *** [modules/python2/CMakeFiles/opencv_python2.dir/all] Error 2
Makefile:160: recipe for target 'all' failed
make: *** [all] Error 2