About to move my BCM2835 program from Bullseye to Trixie as I suspect my SD card is failing. The configure/make/check/install all seemed to work ok.
Recompiling my stuff will take a bit longer as I was halfway through making some major changes on GThreads and other involved bit (unrelated to BCM2835 code).
I build on a Pi400, and deploy on a Pi4B.
I will report back on progress ......