c - c语言内嵌嵌套的限制: Is there a hard limit on this?

Question

我正在用 C 开发一个项目。当我编译时，我得到这个错误:

warning: inlining failed in call to 'xyz()'  --param max-inline-insns-single limit reached

我的编译器将警告报告为错误，我不想绕过它。

那么，这是因为内联函数嵌套太多了吗？我可以做些什么来让它工作(除了不声明内联函数)？

谢谢!

Answer 1

作为gcc docs指出:

max-inline-insns-single:

Several parameters control the tree inliner used in gcc. This number sets the maximum number of instructions (counted in GCC's internal representation) in a single function that the tree inliner will consider for inlining. This only affects functions declared inline and methods implemented in a class declaration (C++). The default value is 500.

如果您仍然希望将警告视为错误(不是不合理的愿望)，只需使用:

--param max-inline-insns-single=1000

(或一些更大的值)将其从默认值提高。