[ubuntu][C++][CMake]g2o源码在ubuntu18.04编译

安装依赖：

sudo apt-get update
sudo apt-get install libeigen3-dev
sudo apt-get install libsuitesparse-dev
sudo apt-get install qtdeclarative5-dev
sudo apt-get install qt5-qmake
sudo apt-get install libqglviewer-dev-qt5
sudo apt-get install freeglut3-dev

开始编译：

git clone https://github.com/RainerKuemmerle/g2o.git

cd g2o

mkdir build

cd build

cmake .. -DG2O_BUILD_EXAMPLES=OFF

make -j8

sudo make install