I've never seen a Linux machine without gcc. But basically, you need to figure out how to install a recent version of gcc and SDL2. There should be a package manager (e.g., "apt get" or "pacman" or whatever your flavor of Linux uses). Weird that you have make but not gcc.
It's supposed to go in a Screenshots subdirectory either in ~/.supermodel/ or wherever Supermodel is. And if this does not exist, it should create it. But I don't know how your directory structure is set up or permissioned. See here for the code. Logic seems a bit convoluted but someone submitted th...
Yes. There is a "Crosshairs" setting that takes an integer value from 0 to 3. For a definitive list of settings you can tweak in the config file (i.e., pretty much everything), look at the DefaultConfig() function in Main.cpp.
Not easily, no. You'd have to know where they are located in the game's ROMs. Some games store them in CROM and others in VROM. The right way to do this would be to add scripting support to Supermodel, like the Model 2 emulator has, and allow texture RAM loads to be intercepted. I guess I could add ...