问题一：
drivers/video/console/vgacon.c:494: error: `PCIMEM_BASE' undeclared (first use in this function) drivers/video/console/vgacon.c:494: error: (Each undeclared identifier is reported only once
解决方法：
device drivers-> Graphics support-> Console display driver support-> [ ]VGA text console（取消）
问题二
net/netfilter/xt_CONNMARK.o', needed by `net/netfilter/built-in.o'
解决方法： 我直接禁掉了netfilter
问题三
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