Enhance make file.

.gitignore

@@ -6,6 +6,7 @@ aur/
 
 # Prerequisites
 *.d
+*.dep
 
 # Compiled Object files
 *.slo

Makefile

@@ -1,21 +1,33 @@
-.PHONY: all clean
+SOURCES = main.cpp winctl.cpp
+TARGET = winctl
 
 CXXFLAGS = -std=c++14 -Wall -O3
-CXXFLAGS += $(shell pkg-config --cflags libwnck-3.0)
-CXXFLAGS += $(shell pkg-config --cflags gdk-3.0)
-CXXFLAGS += $(shell pkg-config --cflags lua)
-CXXFLAGS += $(shell pkg-config --cflags x11)
+CXXFLAGS += ${shell pkg-config --cflags libwnck-3.0}
+CXXFLAGS += ${shell pkg-config --cflags gdk-3.0}
+CXXFLAGS += ${shell pkg-config --cflags lua}
+CXXFLAGS += ${shell pkg-config --cflags x11}
 
 LDFLAGS =
-LDFLAGS += $(shell pkg-config --libs libwnck-3.0)
-LDFLAGS += $(shell pkg-config --libs gdk-3.0)
-LDFLAGS += $(shell pkg-config --libs lua)
-LDFLAGS += $(shell pkg-config --libs x11)
+LDFLAGS += ${shell pkg-config --libs libwnck-3.0}
+LDFLAGS += ${shell pkg-config --libs gdk-3.0}
+LDFLAGS += ${shell pkg-config --libs lua}
+LDFLAGS += ${shell pkg-config --libs x11}
+
+OBJS = ${patsubst %.cpp,%.o,${SOURCES}}
+DEPS = ${patsubst %.cpp,%.o.dep,${SOURCES}}
+
+${TARGET}: ${OBJS}
+	${CXX} -o $@ ${OBJS} ${LDFLAGS}
 
-winctl: arg_parse.h lua.h winctl.h winctl.cpp main.cpp
-	${CXX} ${CXXFLAGS} ${LDFLAGS} -o $@ main.cpp winctl.cpp
+.cpp.o: $(SOURCES)
+	${CXX} ${CXXFLAGS} -c $< -o $@
+	@${CXX} ${CXXFLAGS} -MP -MT $@ -MF $@.dep -MM $<
+
+-include $(DEPS)
+
+.PHONY: all clean
 
 all: winctl
 
 clean:
-	-rm winctl
+	-rm -f ${TARGET} *.o *.o.dep