Install libn32gcc-6-dev-mipsel-cross by entering the following commands in the terminal:
sudo apt update sudo apt install libn32gcc-6-dev-mipsel-cross
Description:
GCC support library (n32 development files)
This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
Homepage: http://gcc.gnu.org/
Version: 6.4.0-17ubuntu1cross1
Section: universe/libdevel