之前跟着高翔学习SLAM一书写了一篇虚拟机安装linux系统(ubuntu1404)、配置SLAM库的教程：https://blog.csdn.net/stjuliet/article/details/85263852
最近更换了双系统(ubuntu1804)，由于系统版本问题，在配置SLAM库中的过程中出现了一些问题，在此记录解决方案。
本文主要参考：https://www.codetd.com/article/2740272
1 IDE-Kdevelop
sudo apt-get update
sudo apt-get install kdevelop
sudo apt install konsole
2 Eigen
sudo apt-get install libeigen3-dev
3 Pangolin
sudo apt-get install libglew-dev libboost-dev libboost-thread-dev libboost-filesystem-dev
git clone https://github.com/stevenlovegrove/Pangolin.git
cd Pangolin
mkdir build
cd build
cmake -DCPP11_NO_BOOST= 1 ..
make
sudo make install
4 Sophus
git clone https://github.com/strasdat/Sophus.git
cd Sophus
git checkout a621ff
mkdir build
cd build
cmake ..
make
在ubuntu18.04下会出现“unit_complex_.real() = 1.； unit_complex_.imag() = 0. ；"的错误
解决方法：在sophus/so2.cpp文件中，将
unit_complex_.real() = 1. ;
unit_complex_.imag() = 0. ;
改为
unit_complex_.real(1.) ;
unit_complex_.imag(0.) ;
然后重新编译
5 OpenCV(Contrib)
OpenCV下载地址：
https://opencv.org/releases.html
OpenCV-Contrib下载地址：
https://github.com/opencv/opencv_contrib/releases
sudo apt-get install build-essential libgtk2.0-dev libvtk6-dev libjpeg-dev libtiff5-dev libopenexr-dev libtbb-dev
sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"
sudo apt update
sudo apt install libjasper1 libjasper-dev
以下为安装contrib所需的依赖项：
sudo apt-get install git cmake pkg-config libjpeg8-dev libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libatlas-base-dev gfortran
///
cd opencv3.4.3
mkdir build
cd build
cmake配置：
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=/home/stjuliet/opencv_contrib-3.4.3/modules ..
make
sudo make install
安装后配置：
sudo gedit /etc/ld.so.conf.d/opencv.conf
在打开的文件末尾添加：/usr/local/lib
使得上面的配置生效：
sudo ldconfig
sudo gedit /etc/bash.bashrc
在打开的文件末尾添加：
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH
使得上面的配置生效：
source /etc/bash.bashrc
更新：
sudo updatedb
6 PCL
sudo apt-get install libpcl-dev pcl-tools
7 Ceres
sudo apt-get install liblapack-dev libsuitesparse-dev libgflags-dev libgoogle-glog-dev libgtest-dev
git clone https://github.com/ceres-solver/ceres-solver.git
cd ceres-solver
mkdir build
cd build
cmake ..
make
sudo make install
8 g2o
sudo apt-get install libsuitesparse-dev qtdeclarative5-dev qt5-qmake libqglviewer-headers
git clone https://github.com/RainerKuemmerle/g2o.git
cd g2o
mkdir build
cd build
cmake ..
make
sudo make install
运行时编译出错问题的解决方案：https://blog.csdn.net/robinhjwy/article/details/78084210
Juliet 于 2019.3