Add tips on troubleshooting `libstdc++` to README

README.md

@@ -27,6 +27,10 @@ If you've finished a project with PySR, please submit a PR to showcase your work
 - [Contributors](#contributors-)
 - [Why PySR?](#why-pysr)
 - [Installation](#installation)
+  - [pip](#pip)
+  - [conda](#conda)
+  - [docker](#docker-build)
+  - [Troubleshooting](#troubleshooting)
 - [Quickstart](#quickstart)
 - [→ Documentation](https://astroautomata.com/PySR)
 
@@ -179,12 +183,25 @@ For more details, see the [docker section](#docker).
 
 ---
 
-### Common issues
+### Troubleshooting
 
 Common issues tend to be related to Python not finding Julia.
 To debug this, try running `python3 -c 'import os; print(os.environ["PATH"])'`.
 If none of these folders contain your Julia binary, then you need to add Julia's `bin` folder to your `PATH` environment variable.
 
+Another issue you might run into can result in a hard crash at import with
+a message like "`GLIBCXX_...` not found". This is due to another one of the Python dependencies
+loading an incorrect `libstdc++` library. To fix this, you should modify your
+`LD_LIBRARY_PATH` variable to reference the Julia libraries. For example, if the Julia
+version of `libstdc++.so` is located in `$HOME/.julia/juliaup/julia-1.10.0+0.x64.linux.gnu/lib/julia/`
+(which likely differs on your system!), you could add:
+
+```
+export LD_LIBRARY_PATH=$HOME/.julia/juliaup/julia-1.10.0+0.x64.linux.gnu/lib/julia/:$LD_LIBRARY_PATH
+```
+
+to your `.bashrc` or `.zshrc` file.
+
 **Running PySR on macOS with an M1 processor:** you should use the pip version, and make sure to get the Julia binary for ARM/M-series processors.
 
 ## Quickstart