GEM := c_extension_example include $(MAKEFILE_4_GEM) GEM_C_FILES := $(wildcard $(SRC_DIR)/*.c) GEM_OBJECTS := $(patsubst %.c, %.o, $(GEM_C_FILES)) MRUBY_CFLAGS := MRUBY_LDFLAGS := MRUBY_LIBS := gem-all : $(GEM_OBJECTS) gem-c-files gem-clean : gem-clean-c-files gem-test : gem-test-c-files