How to compile OpenCV for iOS7 (arm64)

Question

Compiling Xcode Project fails with following errors: \'missing required architecture arm64 in file /Users/*/Git/ocr/opencv2.framework/opencv2\'

It works well, if i c

Answer 1

Instead of using terminal commands given in the opencv installation guide in official website, use the following commands. Worked for me.

cd OpenCV-2.3.1

mkdir build

cd build

cmake -G "Unix Makefiles" ..

make

sudo make install

Answer 2

micahp's answer was almost perfect, but missed the simulator version. So modify platforms/ios/build_framework.py to:

targets = ["iPhoneOS", "iPhoneOS", "iPhoneOS", "iPhoneSimulator", "iPhoneSimulator"]
archs = ["armv7", "armv7s", "arm64", "i386", "x86_64"]

You'll need to download the command line tools for Xcode 5.0.1 and then run

python opencv/platforms/ios/build_framework.py ios

Answer 3

Try to wait a next month. Will release a new XCode with more powerful supporting of 32/64 bit.

https://developer.apple.com/news/index.php?id=9162013a

Answer 4

Modify "build_frameworks.py" to:

def build_framework(srcroot, dstroot):
    "main function to do all the work"

    targets = ["iPhoneOS", "iPhoneOS", "iPhoneOS", "iPhoneSimulator"]
    archs = ["armv7", "armv7s", "arm64", "i386"]
    for i in range(len(targets)):
        build_opencv(srcroot, os.path.join(dstroot, "build"), targets[i], archs[i])

    put_framework_together(srcroot, dstroot)

Answer 5

I was having a similar error, but the issue wasn't related with the arm64 coompilation.fixed adding the framework libc++.dylib

Answer 6

The latest OpenCV iOS framework supports 64 bit by default

It can be downloaded at: OpenCV download page