-m32 只能来自你makefile中的某个地方，你必须跟踪它（使用递归grep）并删除它。

-m32 can only be coming from somewhere in your makefiles, you'll have to track it down (use a recursive grep) and remove it.

当我能够强制-m64，我得到你选择的CPU不支持x86-64指令集。任何线索？ uname -a给x86_64

When I am able to force -m64, I get "CPU you selected does not support x86-64 instruction set".Any clues?. uname -a gives x86_64

这个错误意味着有一个选项 -march = i686 $ c

That error means there is an option like -march=i686 in the makefiles, which is not valid for 64-bit compilation, try removing that too.

如果你不能删除它（更努力！），那么在makefile中的$ c>在命令行后添加 -march = x86-64 将指定一个通用的64位CPU类型。

If you can't remove it (try harder!) then adding -march=x86-64 after it on the command line will specify a generic 64-bit CPU type.