To compile use something like:
"cc -lSDL -lSDL_image -pedantic -O2 -o shim shim.c"
and omit or use any other options you desire. The options -pedantic and -O2
are probably pretty pointless, but I used it for the sake of it. You can
also try to use the provided "compile_shim.sh" script, which may or may not
work for you.