问题
I recently updated my gcc version on CentOS from 4.7 to 5.4, but now I am getting the following error when I compile my program
/lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found
I found some solutions , but I am still not able to fix the issue. These are the paths I found with whereis gcc
gcc: /usr/bin/gcc /usr/lib/gcc /usr/local/bin/gcc /usr/local/lib/gcc /usr/libexec/gcc /usr/share/man/man1/gcc.1.gz
and used this libstdc package for CentOS.
回答1:
Try export LD_LIBRARY_PATH=/usr/local/lib:/usr/lib:/usr/local/lib64:/usr/lib64
回答2:
I didn't have sudo access to my CentOS machine, so I installed gcc with conda. If you installed gcc with conda the above answer won't work. check your gcc installation path as:
$ which gcc
output:
/home/ags/miniconda3/envs/GE/bin/gcc
This tells that gcc is installed in GE conda environment, now export LD_LIBRARY_PATH as the path to lib directory this environment.
export LD_LIBRARY_PATH=/home/ags/miniconda3/envs/GE/lib:$LD_LIBRARY_PATH
Hope this helps.
来源：https://stackoverflow.com/questions/44205687/glibcxx-3-4-21-not-found-on-centos-7