Compile Error : linker command failed with exit code 1

[blueicy]

Mac OS Sierra version 10.12.6 Xcode Version 8.3.3 IOS Version 10.3.3 MacBook Air 2011

Hi. Installing Caffe2-iOS seemed successful But when I compile caffe2-ios.xcodeproj, 72 warnings and 2 errors occurred. I have been trying to fix this error for few weeks. Does anyone know how to solve this problem?

Undefined symbols for architecture arm64: "caffe2::Predictor::~Predictor()", referenced from: -[Caffe2 reloadModel:predict:error:] in Caffe2.o -[Caffe2 loadDownloadedModel:predict:error:] in Caffe2.o ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

Log of bash ./setup.sh

[Step1] Installing dependencies ./setup.sh: line 2: brew: command not found [Step2] git cloning Caffe2 Cloning into 'caffe2'...

..... [Step3] build ios Caffe2 codebase root is: /Users/mba1/caffe2/caffe2-ios/src/caffe2 Build Caffe2 ios into: /Users/mba1/caffe2/caffe2-ios/src/caffe2/build_ios Building protoc Other flags passed to cmake: -DCMAKE_C_FLAGS=-fembed-bitcode -DCMAKE_CXX_FLAGS=-fembed-bitcode -- The C compiler identification is AppleClang 8.1.0.8020042 -- The CXX compiler identification is AppleClang 8.1.0.8020042 -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works -- Detecting C compiler ABI info -- Checking if C linker supports --verbose -- Checking if C linker supports --verbose - no -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Checking if CXX linker supports --verbose -- Checking if CXX linker supports --verbose - no -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Looking for pthread.h -- Looking for pthread.h - found -- Looking for pthread_create -- Looking for pthread_create - found -- Found Threads: TRUE
-- Found ZLIB: /usr/lib/libz.dylib (found version "1.2.8") -- Configuring done -- Generating done -- Build files have been written to: /Users/mba1/caffe2/caffe2-ios/src/caffe2/build_host_protoc/build

.....

-- Performing Test CAFFE2_LONG_IS_INT32_OR_64 -- Performing Test CAFFE2_LONG_IS_INT32_OR_64 - Failed -- Need to define long as a separate typeid. -- Performing Test CAFFE2_NEED_TO_TURN_OFF_DEPRECATION_WARNING -- Performing Test CAFFE2_NEED_TO_TURN_OFF_DEPRECATION_WARNING - Failed -- Turning off deprecation warning due to glog. -- Performing Test CAFFE2_COMPILER_SUPPORTS_AVX2_EXTENSIONS -- Performing Test CAFFE2_COMPILER_SUPPORTS_AVX2_EXTENSIONS - Failed -- NCCL operators skipped due to no CUDA support -- Include NNPACK operators -- CUDA RTC operators skipped due to no CUDA support -- Including image processing operators -- Excluding video processing operators due to no opencv -- Excluding mkl operators as we are not using mkl -- MPI operators skipped due to no MPI support -- -- **** Summary **** -- General: -- Git version : -- System : Darwin -- C++ compiler : /usr/bin/g++ -- C++ compiler version : 8.1.0.8020042 -- Protobuf compiler : /Users/mba1/caffe2/caffe2-ios/src/caffe2/build_host_protoc/bin/protoc -- CXX flags : -fembed-bitcode -Wno-deprecated-declarations -Wno-deprecated -std=c++11 -O2 -fPIC -Wno-narrowing -- Build type : Release -- Compile definitions : CAFFE2_USE_EIGEN_FOR_BLAS;EIGEN_MPL2_ONLY;CAFFE2_UNIQUE_LONG_TYPEMETA -- -- BUILD_SHARED_LIBS : OFF -- BUILD_PYTHON : OFF -- Python version : -- Python library : -- BUILD_TEST : OFF -- USE_CUDA : OFF -- USE_NERVANA_GPU : OFF -- USE_GLOG : OFF -- USE_GFLAGS : OFF -- USE_LMDB : OFF -- USE_LEVELDB : OFF -- USE_OPENCV : ON -- OpenCV version : 2.4.11 -- USE_FFMPEG : -- USE_ZMQ : OFF -- USE_ROCKSDB : OFF -- USE_MPI : OFF -- USE_NCCL : OFF -- USE_NNPACK : ON -- USE_OPENMP : OFF -- USE_REDIS : OFF -- USE_GLOO : OFF -- Configuring done WARNING: Target "libprotoc" has EXCLUDE_FROM_ALL set and will not be built by default but an install rule has been provided for it. CMake does not define behavior for this case. WARNING: Target "protoc" has EXCLUDE_FROM_ALL set and will not be built by default but an install rule has been provided for it. CMake does not define behavior for this case. -- Generating done -- Build files have been written to: /Users/mba1/caffe2/caffe2-ios/src/caffe2/build_ios

......

ranlib libCaffe2_CPU.a [100%] Built target Caffe2_CPU /Users/mba1/anaconda/bin/cmake -E cmake_progress_start /Users/mba1/caffe2/caffe2-ios/src/caffe2/build_ios/CMakeFiles 0 [Tada!] Done

---

[KleinYuan]

@blueicy

I believe this is because of Caffe2 V0.8.0's changes. I updated the setup.sh and please run it again (or you can checkout v0.7.0 version on your own if you don't wanna clone it again).

I tested it on exact same env as yours and I can repeat your previous errors and my new commit will fix that.

Feel free to put an issue here anytime and let me know whether you can make it work.

[blueicy]

@KleinYuan Thanks for your reply! I should have put the issue bit earlier. I thought the errors were caused by somewhere between anaconda and home-brew, as I used to build Caffe2 with anaconda for MacOSX before installing Caffe2 iOS.

Just succeed compiling caffe2-ios app on iPhone by following the Step by Step Tutorial without Caffe2 for MacOSX.

Have not run the newly updated setup.sh with the same setting yet, I will try to install again with Caffe2 MacOSX then update how it works. Thanks again.

[KleinYuan]

@blueicy Sounds great.

Let me know whether you can compile it with the fix and then we can close this issue.