chhokrad opened a new issue #15771: Cross Compile MXNET for RPI 4 with opencv, openmp and DIST_KVSTORE enabled failed URL: https://github.com/apache/incubator-mxnet/issues/15771 ## Description Need instructions to cross compile mxnet for raspberry pi using docker with opencv, openmp and DIST_KVSTORE enabled. I tried changing build_armv7() function to reflect my options but got the following error. ## Environment info (Required) Distributor ID: Ubuntu (Virtual Machine) Description: Ubuntu 16.04.6 LTS Release: 16.04 Codename: xenial MXNET REPO: git clone https://github.com/apache/incubator-mxnet.git --branch v1.4.x --recursive Package used (Python/R/Scala/Julia): Python ## Build info (Required if built from source) Compiler (gcc/clang/mingw/visual studio): gcc (Ubuntu 5.4.0-6ubuntu1~16.04.11) 5.4.0 20160609 MXNet commit hash: e368ea24895b92f7e6b43fc0a51b3b0131193f12 ## Error Message: CMake Warning at CMakeLists.txt:376 (find_package): By not providing “FindOpenCV.cmake” in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by “OpenCV”, but CMake did not find one. Could not find a package configuration file provided by “OpenCV” with any of the following names: OpenCVConfig.cmake opencv-config.cmake Add the installation prefix of “OpenCV” to CMAKE_PREFIX_PATH or set “OpenCV_DIR” to a directory containing one of the above files. If “OpenCV” provides a separate development package or SDK, be sure it has been installed. CMake Error at CMakeLists.txt:379 (find_package): By not providing “FindOpenCV.cmake” in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by “OpenCV”, but CMake did not find one. Could not find a package configuration file provided by “OpenCV” with any of the following names: OpenCVConfig.cmake opencv-config.cmake Add the installation prefix of “OpenCV” to CMAKE_PREFIX_PATH or set “OpenCV_DIR” to a directory containing one of the above files. If “OpenCV” provides a separate development package or SDK, be sure it has been installed. ## Minimum reproducible example Changed build_armv7() function in runtime_function.sh as follows: ``` build_armv7() { set -ex pushd . cd /work/build # Lapack functionality will be included and statically linked to openblas. # But USE_LAPACK needs to be set to OFF, otherwise the main CMakeLists.txt # file tries to add -llapack. Lapack functionality though, requires -lgfortran # to be linked additionally. cmake \ -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE} \ -DCMAKE_CROSSCOMPILING=ON \ -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \ -DCMAKE_C_COMPILER_LAUNCHER=ccache \ -DUSE_CUDA=OFF \ -DUSE_OPENCV=OFF \ -DUSE_OPENMP=OFF \ -DUSE_DIST_KVSTOTE=ON \ -DUSE_SIGNAL_HANDLER=ON \ -DCMAKE_BUILD_TYPE=Release \ -DUSE_MKL_IF_AVAILABLE=OFF \ -DUSE_LAPACK=OFF \ -DBUILD_CPP_EXAMPLES=OFF \ -Dmxnet_LINKER_LIBS=-lgfortran \ -G Ninja /work/mxnet ninja -v build_wheel popd } ```
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