Data structures ready!!

Makefile

@@ -0,0 +1,75 @@
+#Setting a default configuration if invoked with just "make":
+CFG ?= debug
+
+# Config specific settings
+ifeq ($(CFG),debug)
+CFLAGS += -DDEBUG
+else
+CFLAGS += -O3 -DNDEBUG
+endif
+
+inform:
+ifneq ($(CFG),release)
+ifneq ($(CFG),debug)
+	@echo "Invalid configuration "$(CFG)" specified."
+	@echo
+	@echo "Possible choices for configuration are 'CFG=release' and 'CFG=debug'"
+	@exit 1
+endif
+endif
+	@echo "Configuration "$(CFG)
+	@echo "--------------------------------------------------"
+
+rule : dep | inform
+
+BUILD_DIR = build/$(CFG)
+OBJS_DIR = $(BUILD_DIR)/objs
+#--------------------------------------------------
+
+
+BINARY=$(BUILD_DIR)/fsm
+CODEDIRS=. ./src
+INCDIRS=. ./include/ # can be list
+
+CC=gcc
+OPT=-O0
+#generate files that encode make rules for the .h dependencies
+DEPFLAGS=-MP -MD
+#automatically add the -I onto each include directory
+CFLAGS=-Wall -Wextra -g $(foreach D,$(INCDIRS),-I$(D)) $(OPT) $(DEPFLAGS)
+
+# for-style iteration (foreach) and regular expression completions (wildcard)
+CFILES=$(foreach D, $(CODEDIRS),$(wildcard $(D)/*.c))
+# regular expression replacement
+OBJECTS=$(patsubst %.c,$(OBJS_DIR)/%.o,$(CFILES))
+DEPFILES=$(patsubst %.c,$(OBJS_DIR)/%.d,$(CFILES))
+
+all: $(BINARY)
+
+$(BINARY): $(OBJECTS)
+	$(CC) -o $@ $^
+
+# only want the .c file dependency here, thus $< instead of $^.
+#
+%.o:%.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -rf $(BINARY) $(OBJECTS) $(DEPFILES)
+
+# shell commands are a set of keystrokes away
+distribute: clean
+	tar zcvf dist.tgz *
+
+# @ silences the printing of the command
+# $(info ...) prints output
+diff:
+	$(info The status of the repository, and the volume of per-file changes:)
+	@git status
+	@git diff --stat
+
+# include the dependencies
+-include $(DEPFILES)
+
+# add .PHONY so that the non-targetfile - rules work even if a file with the same name exists.
+.PHONY: all clean distribute diff