gfortran-5-mips64el-linux-gnua software package provides GNU Fortran compiler, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gfortran-5-mips64el-linux-gnua
gfortran-5-mips64el-linux-gnua is installed in your system.
Make ensure the gfortran-5-mips64el-linux-gnua package were installed using the commands given below,
$ sudo dpkg-query -l | grep gfortran-5-mips64el-linux-gnua*
You will get with gfortran-5-mips64el-linux-gnua package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Development |
| Package | gfortran-5-mips64el-linux-gnua |
| Version | 5.4.0-6cross1 |
| Description | GNU Fortran compiler |
| Sub Section | devel |