macOS opencv

[sinser]

Has someone been able to build OpenCv on Mac Os X Lion ? I have tried using homebrew but I get the following linking error


Linking CXX shared library ../../lib/libopencv_highgui.dylib
Undefined symbols for architecture x86_64:
"_png_set_gray_1_2_4_to_8", referenced from:
cv:ngDecoder::readData(cv::Mat&) in grfmt_png.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[2]: *** [lib/libopencv_highgui.2.3.1.dylib] Error 1
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
make: *** [all] Error 2

 

[jiminaus]

You seem to have gotten further than me building opencv 2.2.0 using macports 2.0.3 on Lion 10.7.1 with clang 3.0.

I failed at:

[ 59%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/window_cocoa.o

With errors in core/core.hpp.

EDIT: Some research on my case revealed that the issue I'm getting is caused by XCode 4.2 beta. It doesn't appear in XCode 4.1. Also seems opencv 2.3 also doesn't have this problem

You may be interested in this: How to get OpenCV working under Mac OS X Lion with XCode 4.1

 

[sinser]

Yes, I could try macports approach, even if I just was trying to switch to homebrew. I think both packages have problems to coexist.
Here it looked so simple :-(

 

[sinser]

Someone has figured out a fix here https://github.com/mxcl/homebrew/pull/6424. Now it built correctly using homebrew.