Setting up a cross-compiler toolchain from scratch is not an easy task: it involves downloading the sources, patching, configuring, compiling, setting up headers, installation, and much, much more.
重头设置交叉编译器工具链可不是一项简单的任务：它包括下载源代码、修补补丁、配置、编译、设置头文件、安装以及很多很多的操作。
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