build: Make qemu_kernel depend on kernel (not all)

coditva · coditva · commit bbc94c85a1fa · 2018-08-21T15:18:18.000+05:30
diff --git a/makefile b/makefile
@@ -30,7 +30,7 @@ qemu: all
 	@echo "---------------------------------------------"
 	qemu-system-x86_64 -drive format=raw,file=build/disk.img
 
-qemu_kernel: all
+qemu_kernel: $(KERNEL)
 	make --directory kernel qemu
 
 clean:
