Using libpython3 without linking it in; and old Python, g++ compatibility patches

I just released mrcal 2.5 ; much more about that in a future post. Here, I'd like to talk about some implementation details. libpython3 and linking Follow-up patches The technique described here ended up still incomplete! These extra patches were needed: commit c2475520ff0e4905e5d4b2f251ccbd0d54b7e02c Author: Dima Kogan <dima@secretsauce.net> Date: Mon Jan 19 12:44:15 2026 -0800 I weaken the…