需要将cmake项目链接到dl库 [英] Need to link cmake project to dl library

问题描述

我正在构建一个使用dlopen和dlsym系统调用的共享库。
编译时出现错误

I am building a shared library that uses the dlopen and dlsym system calls. When I build, I get the error

undefined reference to `dlopen`

我该如何解决？谢谢！

推荐答案

答案很简单：需要告知cmake使用 $ {CMAKE_DL_LIBS} 。

The answer turns out to be quite simple: cmake needs to be told to link with the DL libs, using ${CMAKE_DL_LIBS} .

因此，对于链接到使用dlopen等的库的任何目标，请调用：

So, for any target that links with a library that uses dlopen, etc, invoke:

target_link_libraries(MY_TARGET LIB1 LIB2 ... LIBN ${CMAKE_DL_LIBS})

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