(ext:install-c-compiler) (setq c:*user-ld-flags* "-lSDL2") (compile-file #p"source.lisp" :system-p t) (c:build-program "mather" :lisp-files '("source.o")) (ext:run-program "./mather" '("--op" "atan2" "-a" "-1.0" "-b" "0") :output t :error t) (si:quit)