ios - opencv2.framework/opencv2(surf.o) duplicate symbols for architecture armv7 -


i integrating opencv2.framework project. did following steps completion.

  1. added opencv2.framework "linked frameworks , libraries"
  2. added libc++.dylib "linked frameworks , libraries"

  3. added following code appname-prefix.pch file

    #ifdef __cplusplus
    #import "opencv2/opencv.hpp"
    #endif

  4. changed compiler default of apple llvm compiler 4.2 - language -> c++ language dialect -> gnu++11 [-std=gnu++11] c++ standard library -> libc++ (llvm c++ standard libray c++ 11 support)

still getting link error saying

"opencv2.framework/opencv2(surf.o) ld: 21 duplicate symbols architecture armv7"

can me on this?

edit:

my xcode version 4.6, ios sdk 6.1 , deployment target 4.3 (i tested 5.0 also, not working in target too)

update: github pull request fixes issue merged opencv.

cause: in opencv source, there 2 files named 1. surf.cpp , 2. surf.ocl.cpp results in 2 surf.o object files each architecture inside opencv framework library.

fix: in opencv source, apply patch github pull request , build opencv ios.

see: use lipo on opencv extract separate libs each architecture ( armv7, armv7s , i386 ) , use ar -tv see 2 object files of same size name surf.o

i don't know: xcode projects fails pre built opencv framework. use xcode 5.0 opencv 2.4.6.1. can fixed xcode build setting ?


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