cpp-hppa-linux-gnu software package provides GNU C preprocessor (cpp) for the hppa architecture, 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 cpp-hppa-linux-gnu
cpp-hppa-linux-gnu is installed in your system.
Make ensure the cpp-hppa-linux-gnu package were installed using the commands given below,
$ sudo dpkg-query -l | grep cpp-hppa-linux-gnu *
You will get with cpp-hppa-linux-gnu package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Interpreters |
| Package | cpp-hppa-linux-gnu |
| Version | 4:6.1.1--2 |
| Description | GNU C preprocessor (cpp) for the hppa architecture |
| Sub Section | Interpreters |