在进行嵌入式开发之前，首先要建立一个交叉编译环境，这是一套编译器、连接器和libc库等组成的开发环境。文章通过一个具体的例子说明了这些嵌入式交叉编译开发工具的制作过程。 -Before doing embedded development, first of all to build a cross compiler environment, it is a compiler, linker and libc libraries composed of development environment. The article shows a concrete example of such cross-compile of embedded development tools, the production process.