I realize there are many questions like this, but the difference from the others is that my libstdc++.so.6 actually does appear to be up to date enough (see below for the strings it exports). This is an error that comes up when trying to load a dynamic library that i just compiled myself. apt-get upgrade and the like tell me libstdc++.so.6 already is up to date (on version libstdc++6 is already the newest version (9.1.0-2ubuntu2~18.04)).
Full error i get when loading this library (in MATLAB R2019a):
'/home/dee/git_repos/Titta/TobiiMex/TobiiMex_matlab/64/TobiiMex_matlab.mexa64': /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.26' not found (required by /home/dee/git_repos/Titta/TobiiMex/TobiiMex_matlab/64/TobiiMex_matlab.mexa64) output of strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBC:
GLIBCXX_3.4 GLIBCXX_3.4.1 GLIBCXX_3.4.2 GLIBCXX_3.4.3 GLIBCXX_3.4.4 GLIBCXX_3.4.5 GLIBCXX_3.4.6 GLIBCXX_3.4.7 GLIBCXX_3.4.8 GLIBCXX_3.4.9 GLIBCXX_3.4.10 GLIBCXX_3.4.11 GLIBCXX_3.4.12 GLIBCXX_3.4.13 GLIBCXX_3.4.14 GLIBCXX_3.4.15 GLIBCXX_3.4.16 GLIBCXX_3.4.17 GLIBCXX_3.4.18 GLIBCXX_3.4.19 GLIBCXX_3.4.20 GLIBCXX_3.4.21 GLIBCXX_3.4.22 GLIBCXX_3.4.23 GLIBCXX_3.4.24 GLIBCXX_3.4.25 GLIBCXX_3.4.26 GLIBC_2.2.5 GLIBC_2.3 GLIBC_2.14 GLIBC_2.6 GLIBC_2.4 GLIBC_2.18 GLIBC_2.16 GLIBC_2.3.4 GLIBC_2.17 GLIBC_2.3.2 GLIBCXX_DEBUG_MESSAGE_LENGTH What can i try to fix this?
3 Answers
Search for other versions of libstdc++.so.6 in your system. You are probably picking up an older version of the dynamic lib.
may export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib/x86_64-linux-gnu/ help?
Installing libstdc++6 and gcc-9 helped me. Hope it will help you too.
sudo add-apt-repository ppa:ubuntu-toolchain-r/test sudo apt update sudo apt install gcc-9 sudo apt install libstdc++6 
