[pjmlp]

I had lots of fun porting software between Aix, HP-UX, Solaris, GNU/Linux and Windows NT/2000 back the late 90's up to until 2003.

That is where I learned what actually means "portable" UNIX software, specially if it needs resources like audio, external hardware or GUIs.

[qwertyuiop924]

Nowadays, SDL, the proliferation of X, and OpenAL make the situation better. But it's still a mess.