A quick cheatsheet for compiling CHDK on Debian
$ sudo apt install gcc-arm-none-eabi
$ svn co https://tools.assembla.com/svn/chdk/trunk chdk
$ make PLATFORM=sx710hs PLATFORMSUB=101a OPT_USE_GCC_EABI=1 firzipsubcomplete
The resulting firmware will be under bin/.
Fantastic to be notified, but what is CHDK?
If there is anyone else as uninformed as me, it’s “CHDK is a firmware enhancement that operates on a number of Canon Cameras”
And you can find out about it at, http://chdk.wikia.com/wiki/CHDK_in_Brief
Alas, I don’t have a Canon camera!