Compilation of OpenSSH 8.1 on AIX

In this post I will explain how to to compile OpenSSH 8.1 on AIX 7.1. The system has a 64 bits PowerPC architecture.

The compilation will be made on a custom directory `/soft/openssh-8.1` and the following software will be included
zlib 1.2.11 for compression support
OpenSSL 1.1.1d
PKIX-SSH 12.3, a fork from OpenSSH with support for X.509 v3 certificates

Compilation on AIX is not a trivial task, and for a guy coming from a Linux world, some steps not so evident, has been needed.