Move confign to defconfig

Kernel.defconfig

@@ -0,0 +1,4 @@
+# vi: ft=make :
+ENABLE_UNIX=0
+ENABLE_NET=0
+ENABLE_VESA=0

Makefile

@@ -1,7 +1,16 @@
 export CC=$(CROSS_COMPILE)gcc
 export O?=build
 
-all: mkdirs $(O)/kernel
+all: chkconfig mkdirs $(O)/kernel
+
+chkconfig:
+	@[ -f Kernel.config ] || { \
+		echo "Kernel.config is not present. Run 'make defconfig' to make one" >&2; \
+		exit 1; \
+	}
+
+defconfig: Kernel.defconfig
+	cp $< Kernel.config
 
 clean:
 	rm -rf $(O)

etc/KernelOptions.makefile

@@ -1,4 +1,6 @@
+ifneq (,$(wildcard ./Kernel.config))
 include Kernel.config
+endif
 
 ifeq ($(ENABLE_UNIX),1)
 KERNEL_DEF+=-DENABLE_UNIX=1