Xcode 5.1 build opencv在64位模拟器上失败

Question

I updated Xcode to 5.1 and many errors appeared in my iOS app project which use opencv framework 2.4. My computer is macbook air and OSX 10.9.2.

When I compile my project, it works fine when I'm using Iphone Retina (3.5-Inch ,4-Inch) Simulator. But when I'm using Iphone Retina (4-Inch 64-bit) I got the following message when I try to build and run :

ld: warning: ignoring file /Users/mike/Documents/opencv2.framework/opencv2, missing required architecture x86_64 in file /Users/mike/Documents/opencv2.framework/opencv2 (3 slices)
Undefined symbols for architecture x86_64:
  "CvKNearest::CvKNearest(CvMat const*, CvMat const*, CvMat const*, bool, int)", referenced from:
  -[HomeViewController ocrTicket:] in HomeViewController.o
  "CvKNearest::~CvKNearest()", referenced from:
  -[HomeViewController ocrTicket:] in HomeViewController.o
  "cv::_InputArray::_InputArray(cv::Mat const&)", referenced from:
  -[HomeViewController ocrTicket:] in HomeViewController.o
  PreProcessImage(cv::Mat*, cv::Mat*, int, int) in HomeViewController.o
  PreProcessImageNew(cv::Mat*, cv::Mat*, int, int) in HomeViewController.o
  -[HomeViewController FromMat:ObtainRect:] in HomeViewController.o
...
ld: symbol(s) not found for architecture x86_64

Answer 1

Xcode upgrade to 5.1, apple default let all app through the 64 - bit compiler. By this way can close: selected the

Targets - > Build Settings - > Architectures. Double-click the Architectures

, choose other , delete in addition to the

$(ARCH_STANDARD) (' - ')

, and then increase

armv7 and armv7s' + '

(point). Compile the clean once again.

Answer 2

Short Answer: Remove arm64 from your list of Architectures in your build settings

Long Answer: Since Xcode 5.1 the default is to include arm64 in the list of standard build architectures. This will cause problems if you use a precompiled library, like OpenCV, that doesn't have a 64-bit slice because the the linker will not be able to find valid code. Don't worry about removing arm64 from your architecture list. As long as it is in the Valid Architectures list it will still run on a 64-bit platform.