OK I finally had a chance to play with this again. I modified the makefile to use the correct compiler but like you said, I needed to probably place the location for the headers in the makefile but I am a bit lost.
/bin/sh: 1: hg: not found
make: *** No rule to make target '/Development/include/SDL/SDL_types.h', needed by 'obj/keyboard.o'. Stop.
I did place the SDL folder from the contrib into /home/vinny/myrepo/alt-abiv0-linux-i386/bin/linux-i386/AROS/Development/include/
but I have a feeling it's not the right location?
I'll send you the makefile so maybe you can guide me there.
Would it help if I added /home/vinny/myrepo/alt-abiv0-linux-i386/bin/linux-i386/AROS/Development/include/
to the $PATH ?