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中文版本

Build and Install

Build-Option

MNN_DEBUG

Defaults OFF, When OFF, remove symbols and build with optimizations.

MNN_OPENMP

Defaults ON, When OFF, do not use openmp multi-thread, only effective on Android/Linux.

MNN_OPENCL

Defaults OFF, When ON, build the OpenCL backend, apply GPU according to setting the forward type to be MNN_FORWARD_OPENCL at inference time.

MNN_OPENGL

Defaults OFF, When ON, build the OpenGL backend, apply GPU according to setting the forward type to be MNN_FORWARD_OPENGL at inference time.

MNN_VULKAN

Defaults OFF, When ON, build the Vulkan backend, apply GPU according to setting the forward type to be MNN_FORWARD_VULKAN at inference time.

MNN_METAL

Defaults OFF, When ON, build the Metal backend, apply GPU according to setting the forward type to be MNN_FORWARD_Metal at inference time, only effective on iOS/macOS.

Linux|arm|aarch64|Darwin

Build on Host

  1. Install cmake(cmake version >=3.10 is recommended)
  2. cd /path/to/MNN
  3. ./schema/generate.sh
  4. ./tools/script/get_model.sh(optional, models are required only in demo project)
  5. mkdir build && cd build && cmake .. && make -j4

Then you will get the MNN library(libMNN.so)

Cross Compile

Download cross compile toolchain from Linaro

Example:

  1. Download AArch64 toolchain
mkdir -p linaro/aarch64
cd linaro/aarch64

wget http://releases.linaro.org/components/toolchain/binaries/latest-7/aarch64-linux-gnu/gcc-linaro-7.4.1-2019.02-x86_64_aarch64-linux-gnu.tar.xz

tar xvf gcc-linaro-7.4.1-2019.02-x86_64_aarch64-linux-gnu.tar.xz

export cross_compile_toolchain=linaro/aarch64/aarch64-linux-gnu
  1. build with cmake
cmake .. \
-DCMAKE_SYSTEM_NAME=Linux \
-DCMAKE_SYSTEM_VERSION=1 \
-DCMAKE_SYSTEM_PROCESSOR=aarch64 \
-DCMAKE_C_COMPILER=$cross_compile_toolchain/aarch64-linux-gnu-gcc \
-DCMAKE_CXX_COMPILER=$cross_compile_toolchain/aarch64-linux-gnu-g++
  1. compile
mkdir build
cd build
cmake ..
make -j4

Android

  1. Install cmake(cmake version >=3.10 is recommended)
  2. Download and Install NDK, download the the version before r17 is strongly recommended (otherwise cannot use gcc to build, and building armv7 with clang possibly will get error)
  3. Set ANDROID_NDK path, eg: export ANDROID_NDK=/Users/username/path/to/android-ndk-r14b
  4. cd /path/to/MNN
  5. ./schema/generate.sh
  6. ./tools/script/get_model.sh(optional, models are required only in demo project)
  7. cd project/android
  8. Build armv7 library: mkdir build_32 && cd build_32 && ../build_32.sh
  9. Build armv8 library: mkdir build_64 && cd build_64 && ../build_64.sh

iOS

open MNN.xcodeproj with Xcode on macOS, then build.