I tried to fix NetBSD build without breaking FreeBSD, Linux and termux..

It seems I successed!

Attached patches builds (and runs)

on NetBSD 9.2 I386

FreeBSD 12.3 amd64

Slackware 15.0 i586

Termux aarch64

all without-thirdparty for saving build time.

Can you test them on your usual systems?