mips工具链编译 undefined reference to `__ctype_b_loc‘

使用mips-linux-gnu-工具链编译代码时，遇到错误：

undefined reference to `__ctype_b_loc'
undefined reference to `__ctype_tolower_loc'
undefined reference to `__assert_fail'

undefined reference to `uselocale'
undefined reference to `duplocale'
undefined reference to `newlocale'
undefined reference to `freelocale'

undefined reference to `__xstat'

都是编译开源库中出现的问题，一路追踪，发现编译时使用了-muclibc选项，所以使用的非glibc；

在编译时加上-Wno-unused-local-typedefs即可。