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also investigate https://github.com/pixaline/slicer.git and https://github.com/pixaline/skeleton_animator.git

for MacOS to work, we have to follow this https://lazyfoo.net/tutorials/SDL/01_hello_SDL/mac/xcode/index.php We have to build an xcode project and add all the src. And we have to fix _stricmp -> strcasecmp. And we have to fix ALL references to instr to something like fuck_curses_instr as the symbol name clashes We need to sort out dylib linking and signing on mac without xcode too