diff --git a/Makefile b/Makefile
index 02b8066..4270ac5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,23 @@
+EXEC=PiegOS
+
+all:$(EXEC)
+
+#----- Copy kernel -----
+$(EXEC): kernel/kernel.bin
+	cp kernel/kernel.bin ./$(EXEC)
+#-----------------------
 
 
-PiegOS: kernel/kernel.bin
-	cp kernel/kernel.bin ./PiegOS
 
+#----- Gen Kernel -----
 kernel/kernel.bin:
 	cd kernel/ && make
+#----------------------
 
+
+
+#----- Other -----
 clean:
 	cd kernel && make clean
-	rm PiegOS
+	rm $(EXEC)
+#-----------------
diff --git a/kernel/GDT/Makefile b/kernel/GDT/Makefile
index 6e1b2c8..b4a9400 100644
--- a/kernel/GDT/Makefile
+++ b/kernel/GDT/Makefile
@@ -1,5 +1,15 @@
-gdt.o: gdt.cpp
-	g++ -m32 -c -o gdt.o gdt.cpp
+EXEC=gdt.o
 
+
+all:$(EXEC)
+
+#----- GDT -----
+$(EXEC): gdt.cpp
+	$(CXX) -c -o $(EXEC) gdt.cpp
+#---------------
+
+
+#----- Other -----
 clean:
 	rm *.o
+#----------------
diff --git a/kernel/Makefile b/kernel/Makefile
index cb1a351..b323e6e 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -1,7 +1,12 @@
+CXX=g++ -Wall -m32
+EXEC=kernel.bin
 
+export CXX
+
+all:$(EXEC)
 
 #----- Kernel -----
-kernel.bin:entry.o main.o GDT/gdt.o
+$(EXEC):entry.o main.o GDT/gdt.o
 	ld -m elf_i386 --entry=_start -Ttext=0x100000 -o $@ $^
 #-----------------
 
@@ -10,7 +15,7 @@ kernel.bin:entry.o main.o GDT/gdt.o
 entry.o:entry.asm
 	nasm -f elf $^
 main.o:main.cpp
-	g++ -Wall -m32 -c $^ -o $@
+	$(CXX) -c $^ -o $@
 #-----------------------
 
 
@@ -24,4 +29,5 @@ GDT/gdt.o:
 clean:
 	cd ./GDT/ && make clean
 	rm ./*.o
-	rm ./kernel.bin
+	rm ./$(EXEC)
+#-----------------