linux内核模块链接器警告：“*** Warning：< function> [< module>] undefined！“ - 以任何方式摆脱他们？ [英] linux kernel module linker warnings: "*** Warning: <function> [<module>] undefined!" - any way to get rid of them?

问题描述

在编译依赖于彼此的Linux内核模块时，链接器会提供未定义的符号警告，例如

While compiling Linux kernel modules that depend on each other, linker gives undefined symbol warnings like

 Building modules, stage 2.
 MODPOST
*** Warning: "function_name1" [module_name] undefined!
*** Warning: "function_name2" [module_name] undefined!
*** Warning: "function_name3" [module_name] undefined!

使用insmod或modprobe将模块插入内核后，未解析的符号才会解析。有没有办法摆脱链接器警告，虽然？

The unresolved symbols are resolved as soon as module is inserted into kernel using insmod or modprobe. Is there any way to get rid of the linker warning, though?

我已经阅读了3谷歌SERP的这个问题 - 似乎没有人知道答案。在构建内核模块时，这些链接器警告是否应该是这样的？

I have read through 3 Google SERP's on this issue - it seems nobody knows the answer. Are these linker warnings supposed to be this way when you build a kernel module?

推荐答案

使用KBUILD_EXTRA_SYMBOLS如下：
KBUILD_EXTRA_SYMBOLS ='您的模块路径'/ Module.symvers

Use KBUILD_EXTRA_SYMBOLS as below: KBUILD_EXTRA_SYMBOLS='your module path'/Module.symvers

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