My only line of code is
import geopandas
and it gives me the error
OSError: Could not find libspatialindex_c library file
I had the same issue while working in Linux Subsystem at Windows 10 (speaking about this). What helped was installing the version for developers using apt. Namely:
sudo apt install libspatialindex-dev did the job.
I did not need to work with make.
edit: Nice to see my answer has been upvoted so many times; in the time of writing it, however, this was not the most popular answer and it was preceeded by the other answers that suggested using make. This is why I am referring to this command; and I think the other answers are worth reading anyway.