ncnn之二：Linux環境下ncnn安裝+protobuf+opencv
1 安裝g++
$ sudo apt-get install build-essential
2 安裝cmake
# 下載地址： https://cmake.org/
$ tar -xvf cmake-3.16.0-rc1.tar.gz
$ chmod -R 777 cmake-3.16.0-rc1
# 檢測gcc和g++是否安裝
$ sudo apt-get install build-essential
$ cd cmake-3.16.0-rc1
$ sudo ./bootstrap
$ sudo make
$ sudo make install
參考： https://blog.csdn.net/libo2017/article/details/90084742
3 安裝 protobuf
online：
$ sudo apt-get install autoconf automake libtool curl make g++ unzip
$ git clone https://github.com/google/protobuf.git
$ cd protobuf
$ git submodule update --init --recursive
$ ./autogen.sh
$ ./configure
$ make
$ make check
$ sudo make install
$ sudo ldconfig #refresh shared library cache.
參考： https://blog.csdn.net/halazi100/article/details/85846858
offline:
# 下載地址：https://github.com/google/protobuf/releases
$ tar -xvf protobuf-cpp-3.10.0.tar.gz
$ cd protobuf-3.10.0
$ ./configure --prefix=/usr/local/protobuf
$ make
$ make check
$ sudo make install
$ protoc –version
4 安裝opencv
# https://opencv.org/releases.html
$ unzip opencv-3.4.0.zip
$ cd opencv-3.4.0/
$ mkdir build
$ cd build/
$ cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ..
$ sudo make instal
# 查看opencv版本
$ pkg-config --modversion opencv
5 安裝ncnn
$ git clone https://github.com/Tencent/ncnn
$ cd <ncnn-root-dir>
$ mkdir -p build
$ cd build
$ cmake ..
$ make -j4
