How to solve this problem，thank you
Closed this issue · 7 comments
[100%] Linking CXX executable ../example/vdo_slam
CMakeFiles/vdo_slam.dir/example/vdo_slam.cc.o: In function main': vdo_slam.cc:(.text.startup+0xc08): undefined reference to cv::optflow::readOpticalFlow(cv::String const&)'
collect2: error: ld returned 1 exit status
CMakeFiles/vdo_slam.dir/build.make:115: recipe for target '../example/vdo_slam' failed
make[2]: *** [../example/vdo_slam] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/vdo_slam.dir/all' failed
make[1]: *** [CMakeFiles/vdo_slam.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
Hi, @xiaohang212. Looks like it has something to do with the function of "cv::optflow::readOpticalFlow()"; Please check your opencv version if it support this function, shouldn't be a difficult issue to fix. Hope this helps.
Hi @xiaohang212,
Please let us know if you solved this issue.
Problem solved, thank you～
@xiaohang212
hello xiaohang, could u please tell me how did u solve this issue?
I still have the problem as you before.
Thanks! :)
@xiaohang212 你好小航，你能告诉我你是怎么解决这个问题的吗？ 我还是和你以前一样的问题。 谢谢！:)
I downgraded Opencv version, OPENCV3.4.0 + contrib may work.But I didn't get to the bottom of why