openfoam v2006 wsl2 ubuntu 20.04 GLIBCXX_3.4.26 not found
 

Since I installed according to the guide (https://openfoam.com/download/install-windows-10.php) wsl2 ubuntu 20.04, I've been having errors related to libstc++.so.6, specifically GLIBCXX_3.4.26 not found (required by ...) where ... refers to different files within /opt/OpenFOAM/ThirdParty-v2006/platforms/linux64/gcc-6.3.0/lib64/ ending with .so, .so.1, .so.6 and so on (for instance, when running paraFoam the error would appear with respect to about 20 such files). I am able to successfully visualize the cavity tutorial (in paraview installation on windows).
I could get the errors to go away by doing what the user laborg suggested on Jan 4 for a similar problem with julia (see https://discourse.julialang.org/t/gl...rcall/29113/10), specifically copy libstdc++.so.6 from /usr/lib/x86_64-linux-gnu to /opt/OpenFOAM/ThirdParty-v2006/platforms/linux64/gcc-6.3.0/lib64/.
The questions is whether this copy-paste solution is recommended or a different methods is more appropriate; will the solution to the errors come back and haunt me later? Is the libstdc++.so.6 from system installation going to be an issue if used in the lib64 folder of openfoam?
An additional info concerning openfoam installation, foamInstallationTest shows *not installed* errors against flex, wmake, gcc, g++, icoFoam and *critical error* for gcc, g++, icoFoam; but I as see here: https://www.cfd-online.com/Forums/op...ationtest.html, foamInstallationTest is not meant for installation from the tar file. Openfoam installation seems to be alright based on the running of the cavity tutorial.

It's not recommended to use lib by copy-paste.
add lib path to environment, like $LD_LIBRARY; and tell the compiler software(make/wmake) where to load lib. (By modify make/option(make) for once wmake OR somewhere I don't know to change every wmake.)


OR


this 64 bit lib path form "/usr/lib/x86_64-linux-gnu" is used by debian-based OS. and redhat-based OS is different("/usr/lib64"). while some compiler setting is assumed to work with redhat-based OS. you could put a soft link, /usr/lib64/libstdc++.so.6, link to /usr/lib/x86_64-linux-gnu/libstdc++.so.6