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OpenCV iOS build problem: The opencv2.framework is almost empty [closed]

asked 2015-01-28 00:21:16 -0500

Ben Lau gravatar image

Hi,

I would like to build OpenCV for iOS. I have followed the instruction with those steps

  1. cd /; sudo ln -s /Applications/Xcode.app/Contents/Developer Developer
  2. cd ~/<my_working_directory>; python opencv/platforms/ios/build_framework.py ios

http://docs.opencv.org/doc/tutorials/...

Those step is successfully without any errors. The opencv2.framework was there in the ios folder. However, the file size is just around 2MB.

Then I run nm to check the content:

$ nm ios/opencv2.framework/Versions/Current/opencv2 

ios/opencv2.framework/Versions/Current/opencv2(world_init.o):
0000000000000030 s EH_Frame1
                 U __ZN2cv13initModule_mlEv
                 U __ZN2cv16initModule_videoEv
                 U __ZN2cv18initModule_nonfreeEv
                 U __ZN2cv21initModule_features2dEv
0000000000000000 T __ZN2cv7initAllEv
0000000000000048 s func.eh

That is all the symbol of the file has. Unlike the opencv2.framework downloaded

I have been tested with 2.4.9 and 2.4.10 . The result is same. Any suggestion to find out the problem?

-- General configuration for OpenCV 2.4.10 =====================================
--   Version control:               unknown
--
--   Platform:
--     Host:                        Darwin 14.0.0 x86_64
--     Target:                      iOS
--     CMake:                       3.0.0
--     CMake generator:             Xcode
--     CMake build tool:            /usr/local/Cellar/cmake/3.0.0/bin/cmakexbuild
--     Xcode:                       6.0.1
--
--   C/C++:
--     Built as dynamic libs?:      NO
--     C++ Compiler:                /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++  (ver 6.0.0.6000051)
--     C++ flags (Release):         -stdlib=libc++ -headerpad_max_install_names -fvisibility=hidden -fvisibility-inlines-hidden -fPIC   -DNDEBUG -O3 -fomit-frame-pointer -ffast-math  -DNDEBUG
--     C++ flags (Debug):           -stdlib=libc++ -headerpad_max_install_names -fvisibility=hidden -fvisibility-inlines-hidden -fPIC   -g  -O0 -DDEBUG -D_DEBUG
--     C Compiler:                  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
--     C flags (Release):           -Wno-implicit-function-declaration -fPIC   -O3 -DNDEBUG  -DNDEBUG
--     C flags (Debug):             -Wno-implicit-function-declaration -fPIC   -g  -O0 -DDEBUG -D_DEBUG
--     Linker flags (Release):
--     Linker flags (Debug):
--     Precompiled headers:         NO
--
--   OpenCV modules:
--     To be built:                 core flann imgproc highgui features2d calib3d ml nonfree objdetect video contrib legacy photo stitching videostab world
--     Disabled:                    -
--     Disabled by dependency:      -
--     Unavailable:                 androidcamera dynamicuda gpu java ocl python superres ts viz
--
--   GUI:
--     Cocoa:                       YES
--     OpenGL support:              NO
--     VTK support:                 NO
--
--   Media I/O:
--     ZLib:                        build (ver 1.2.7)
--     JPEG:                        build (ver 62)
--     PNG:                         build (ver 1.5.12)
--     TIFF:                        NO
--     JPEG 2000:                   NO
--     OpenEXR:                     NO
--
--   Video I/O:
--     AVFoundation:                YES
--     QuickTime:                   NO
--     QTKit:                       NO
--     V4L/V4L2:                    NO/NO
--     XIMEA:                       NO
--
--   Other third-party libraries:
--     Use IPP:                     NO
--     Use Eigen:                   NO
--     Use TBB:                     NO
--     Use OpenMP:                  NO
--     Use GCD                      YES
--     Use Concurrency              NO
--     Use C=:                      NO
--     Use Cuda:                    NO
--     Use OpenCL:                  NO
--
--   Python:
--     Interpreter:                 NO
--
--   Java:
--     ant:                         NO
--     JNI:                         NO
--     Java tests:                  NO
--
--   Documentation:
--     Build Documentation:         NO
--     Sphinx:                      NO
--     PdfLaTeX compiler:           NO
--
--   Tests and samples:
--     Tests:                       NO
--     Performance tests:           NO
--     C/C++ Examples:              NO
--
--   Install path:                  /Users/benlau/Downloads/opencv-2.4.10/ios/build/iPhoneOS-armv7/install
--
--   cvconfig.h is in:              /Users/benlau/Downloads/opencv-2.4.10/ios/build/iPhoneOS-armv7
-- -----------------------------------------------------------------
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Closed for the following reason the question is answered, right answer was accepted by Ben Lau
close date 2015-01-30 01:23:51.749265

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answered 2015-01-30 01:23:32 -0500

Ben Lau gravatar image

Seem that there has problem in making the libopencv_world.a . It do not include the built module. Finally , I solve this problem by checkout the latest git version instead of using 2.4.9 /2.4.10 .

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Asked: 2015-01-28 00:21:16 -0500

Seen: 813 times

Last updated: Jan 30 '15