Build error: undefined reference to 'g2o...'

[kushoucode]

I just use the command './build.sh' to build ORB_SLAM3, but met a problem when linking, I guess.
Here I show the log file of building.
log.txt

[Dave-van-der-Meer]

I had a simular issue, related to linking issues with g2o and I solved it following the issue #458. The solution was to change the compiler version in the CMakeFile.txt using the following command:

sed -i 's/++11/++14/g' CMakeLists.txt

This solved the issue for me.