feat: Makefile multithreading, .h deps

Makefile

@@ -1,11 +1,12 @@
-CFLAGS	=	-Wall -Wpedantic -Wextra
-LDFLAGS	=	-lcurl
+CFLAGS	:=	-Wall -Wpedantic -Wextra -MMD
+LDFLAGS	:=	-lcurl
 
-SRC		=	crypto.c
+SRC		:=	crypto.c	\
 
-OBJ		=	$(SRC:.c=.o)
+OBJ		:=	$(SRC:.c=.o)
+DEP		:=	$(SRC:.c=.d)
 
-.PHONY:		all clean re debug
+NAME	:=	crypto
 
 all:		crypto
 
@@ -14,14 +15,20 @@ $(OBJ):		config.h
 config.h:
 	cp config.def.h $@
 
-crypto:	$(OBJ)
+$(NAME):	$(OBJ)
 	$(CC) -o $@ $(LDFLAGS) $(OBJ)
 
 clean:
-	$(RM) $(OBJ)
-	$(RM) crypto
+	$(RM) $(OBJ) $(DEP)
 
-re:			clean all
+fclean:		clean
+	$(RM) $(NAME)
 
-debug:		CFLAGS+=-g3
-debug:		re
+re:			fclean
+	$(MAKE)
+
+debug:		fclean
+	CFLAGS=-g3 $(MAKE)
+
+.PHONY:		all clean fclean re debug
+-include $(DEP)