c - ‘mc’ 在单词 'mcmodel=medium' 中意味着什么？

Question

问题如标题，是缩写吗？ 我尝试在 Google 上搜索，但无法轻松找到答案。

Answer 1

根据GCC docs ,

These ‘-m’ switches are supported in addition to the above on x86-64 processors in 64-bit environments.

因此-m表示特定于机器的选项。然后

-mcmodel=medium

Generate code for the medium model: the program is linked in the lower 2 GB of the address space. Small symbols are also placed there. Symbols with sizes larger than -mlarge-data-threshold are put into large data or BSS sections and can be located above 2GB. Programs can be statically or dynamically linked.

所以cmodel代表“代码模型”，它决定了程序如何链接在一起的最大限制。事实上，“中”足以容纳全局对象大于 2 GB 的程序，按照大多数标准来看，这已经是巨大的了。