gobjc-s390x-linux-gnu software package provides GNU Objective-C compiler for the s390x architecture, you can install in your Ubuntu 17.04 (Zesty Zapus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gobjc-s390x-linux-gnu
gobjc-s390x-linux-gnu is installed in your system.
Make ensure the gobjc-s390x-linux-gnu package were installed using the commands given below,
$ sudo dpkg-query -l | grep gobjc-s390x-linux-gnu *
You will get with gobjc-s390x-linux-gnu package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | Development |
| Package | gobjc-s390x-linux-gnu |
| Version | 4:6.1.1-1ubuntu2 |
| Description | GNU Objective-C compiler for the s390x architecture |
| Sub Section | devel |