I've written a c++ program in Xcode 6.3.1 and when I try to run it, it says 'build failed' and gives an Apple Mach-O Linker error. When I click on it, it says 'undefined symbols for architecture x86_64', and 'linker command failed with exit code 1 (use -v to see invocation)'. I've tried deleting the DerivedData file but that didn't do anything. Any suggestions?
MacBook Pro (Retina, 13-inch, Mid 2014), OS X Yosemite (10.10.1)
Can you help please?
Hello Undergroundkinng,
That error also says exactly what caused the linker error. What else did it say?
That's all it says
No. It says more than that, I'm sure.
Problem is solved. Turns out my code wasn't structured properly. It works now.
Hi Etresoft.
Can you have a look at this for my i have a similar issue.
Ld build/Debug/HandDetection normal x86_64
cd /Users/imac/Desktop/HandDetection
export MACOSX_DEPLOYMENT_TARGET=10.10
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/ usr/bin/clang++ -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/ SDKs/MacOSX10.10.sdk -L/Users/imac/Desktop/HandDetection/build/Debug -L/Users/imac/Documents/OpenCV/opencv-3.0.0/build/lib -F/Users/imac/Desktop/HandDetection/build/Debug -F/usr/local/lib -filelist /Users/imac/Desktop/HandDetection/build/HandDetection.build/Debug/HandDetection .build/Objects-normal/x86_64/HandDetection.LinkFileList -mmacosx-version-min=10.10 -stdlib=libc++ -lopencv_highgui.3.0.0 -lopencv_core.3.0.0 -lopencv_imgproc.3.0.0 -Xlinker -dependency_info -Xlinker /Users/imac/Desktop/HandDetection/build/HandDetection.build/Debug/HandDetection .build/Objects-normal/x86_64/HandDetection_dependency_info.dat -o /Users/imac/Desktop/HandDetection/build/Debug/HandDetection
Undefined symbols for architecture x86_64:
"cv::VideoCapture::VideoCapture(int)", referenced from:
_main in main.o
"cv::VideoCapture::~VideoCapture()", referenced from:
_main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I have no idea why it is doing this. I am using openCV and am trying to create a basic program. Any help would be appreciated.
openCV3.0.0 and X Code 6.3.2
Hello Ric,
You have linked to three different OpenCV libraries. I guess there is at least one more that you haven't linked with. I don't know anything about OpenCV. You will have to track down which one contains that class.
Sorry, only you can link to the Pods_blackjack framework
What does Apple Mach-O Linker error mean
