cyrusbehr opened a new issue #15327: Could not find OpenBlas - docker cross compile armv7 URL: https://github.com/apache/incubator-mxnet/issues/15327 I am using docker to cross compile mxnet with the C++ package enabled for raspberry pi 3 b. I am using the following docker file: ``` FROM dockcross/linux-armv7 MAINTAINER Cyrus Behroozi [email protected] ENV DEFAULT_DOCKCROSS_IMAGE linux-armv7-rpi # OpenCV Dependencies RUN sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get install -y \ build-essential \ cmake unzip pkg-config \ libjpeg-dev \ libpng-dev \ libtiff-dev \ libavcodec-dev \ libavformat-dev \ libswscale-dev \ libv4l-dev \ libxvidcore-dev \ libx264-dev \ libgtk-3-dev \ libatlas-base-dev \ gfortran \ && sudo rm /usr/local/lib/libcurl.so.4 \ && sudo ln -s /usr/lib/x86_64-linux-gnu/libcurl.so.4.3.0 /usr/local/lib/libcurl.so.4 # OpenCV Insallation ENV OPENCV_VERSION="4.1.0" RUN mkdir -p ~/opencv \ && cd ~/opencv \ && wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip \ && unzip ${OPENCV_VERSION}.zip \ && mkdir ~/opencv/opencv-${OPENCV_VERSION}/build \ && cd ~/opencv/opencv-${OPENCV_VERSION}/build \ && cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D INSTALL_C_EXAMPLES=OFF \ -DBUILD_SHARED_LIBS=OFF \ .. \ && make -j8 \ && sudo make install \ && rm ~/opencv/${OPENCV_VERSION}.zip \ && rm -r ~/opencv/opencv-${OPENCV_VERSION} # mxnet requirements RUN sudo apt-get -y install ninja-build \ liblapack* \ libblas* \ libopenblas* \ && cd ~ \ && git clone https://github.com/apache/incubator-mxnet.git --recursive \ && cd incubator-mxnet RUN cd ~/incubator-mxnet \ && mkdir -p build \ && cd build \ && cmake \ -DUSE_CPP_PACKAGE=1 \ -DUSE_SSE=OFF \ -DUSE_CUDA=OFF \ -DUSE_OPENCV=ON \ -DUSE_OPENMP=ON \ -DUSE_MKL_IF_AVAILABLE=OFF \ -DUSE_SIGNAL_HANDLER=ON \ -DCMAKE_BUILD_TYPE=Release \ -GNinja .. \ && ninja -j8 ``` As it can be seen, in the step labeled `# mxnet requirements`, I am installing `libopenblas`. If I enter the docker container and perform a find operation, I can see that `libopenblas` is indeed installed: ``` $ sudo find . | grep libopenblas ./usr/share/doc/libopenblas-dev ./usr/share/doc/libopenblas-dev/copyright ./usr/share/doc/libopenblas-base ./usr/share/doc/libopenblas-base/copyright ./usr/lib/libopenblas.a ./usr/lib/libopenblas.so.0 ./usr/lib/libopenblasp-r0.2.19.so ./usr/lib/libopenblas.so ./usr/lib/libopenblasp-r0.2.19.a ``` However, when I build my dockerfile, I get the following errors: ``` -- Could not find OpenBLAS include. Turning OpenBLAS_FOUND off -- Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off CMake Error at cmake/Modules/FindOpenBLAS.cmake:82 (MESSAGE): Could not find OpenBLAS Call Stack (most recent call first): cmake/ChooseBlas.cmake:42 (find_package) CMakeLists.txt:323 (include) ``` I am not sure why it is unable to find the package as the search path (specified in `cmake/Modules/FindOpenBLAS.cmake`) has '/usr/lib' as a search path: ``` SET(Open_BLAS_LIB_SEARCH_PATHS /lib/ /lib/openblas-base /lib64/ /usr/lib /usr/lib/openblas-base /usr/lib64 /usr/local/lib /usr/local/lib64 /opt/OpenBLAS/lib /usr/local/opt/openblas/lib ${PROJECT_SOURCE_DIR}/3rdparty/OpenBLAS/lib ${PROJECT_SOURCE_DIR}/thirdparty/OpenBLAS/lib ${OpenBLAS_DIR} ${OpenBLAS_DIR}/lib ${OpenBLAS_HOME} ${OpenBLAS_HOME}/lib ) ```
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