参考网站：
g2o installation fails because of some qt5 dependency · Issue #5 · Shubodh/MR-project1-pgo · GitHubI am getting the following error in g2o installation, which is because of qt5. I have tried with and without the optional deps for g2o but the error persists. Package installation details: Tried with and without optional dependencies of ...https://github.com/Shubodh/MR-project1-pgo/issues/5https://githubmemory.com/repo/RainerKuemmerle/g2o/issues/446https://githubmemory.com/repo/RainerKuemmerle/g2o/issues/446
先占坑，细节后面再写。
