Then, when the linker is setting up references to functions, it compares the TOC of the current function to the TOC of the function it's calling.

然后，当链接器设置对函数的引用时，就会将当前函数的 TOC 与所调用的函数的 TOC 进行比较。

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By setting this variable, the linker assumes that a 2.4 kernel is running along with the older LinuxThreads model.

通过设置这个环境变量，连接器将认为2.4内核运行旧的LinuxThreads模型。

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