This is a very interesting and useful question.

At the outset of PD I only worried about having it run on the "current" platforms: Redhat 5.2, Windows 95, and when it arrived, MacOS 10.2. Older platforms weren't important.

Since then I've tried to keep back compatibility to whatever those bleeding-edge OSes were, because I assume people can't always afford machine upgrades. But I haven't tried to extend Pd (Or "extra" objects) backward past the original dates.

At the moment I can only compile back to OSX 10.5 (PPC) and Windows XP; I don't have real or virtual machines that go back further.

So my suggestion would be: make it work on today's OSes, and try to keep it alive on them, but don't worry too hard about older ones. I don't think I'm ever going to be tempted to compile Pd for Windows 3.1.

cheers Miller

On Sun, Mar 18, 2018 at 05:04:49PM -0700, Alex wrote:

I'm curious what is the earliest SDK people target for building externals?

It looks like the jit_expr external I built on my work machine, mac os version 10.13, doesn't work on a 10.10.5 machine and it seems as though it must be an SDK version issue.

Thanks, Alex

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