How to fix "ImportError: libgfortran.so.5: cannot open shared object file: No such file or directory." in ubuntu 18.04 aarch64

Question

I am testing rknn api on my rk3399pro, which is arm64, ubuntu18.04. I got libgfortran.so.5 importerror.

I try "apt-get install gfortran", but only has 4.7.4.0 version. I try "find /usr -name libgfortran*".The result is:

/usr/lib/aarch64-linux-gnu/libgfortran.so.4.0.0
/usr/lib/aarch64-linux-gnu/libgfortran.so.4
/usr/lib/gcc/aarch64-linux-gnu/7/libgfortran.spec
/usr/lib/gcc/aarch64-linux-gnu/7/libgfortran.so
/usr/lib/gcc/aarch64-linux-gnu/7/libgfortran.a
/usr/share/doc/libgfortran4
/usr/share/doc/libgfortran-7-dev

How should I fix it?

Answer 1

sudo apt-get update 
sudo apt-get install libgfortran5

Answer 2

This worked for me

pip install --upgrade scipy