涉及cmake的建筑项目，我如何使它意识到图书馆 [英] Building project involving cmake, how do I make it aware of libraries

问题描述

当我尝试使用cmake和gcc在64位linux（debian）机器上构建此项目时，我从链接器收到错误：

When I try to build this project with cmake and gcc on a 64-bit linux (debian) machine, I get an error from the linker:

Linking C executable ../../../../cpsadamsx
/home/dala/lib64/libSimTKcommon.so: undefined reference to `dlopen'
/home/dala/lib64/libSimTKcommon.so: undefined reference to `dlclose'
/home/dala/lib64/libSimTKcommon.so: undefined reference to `dlerror'
/home/dala/lib64/libSimTKcommon.so: undefined reference to `dlsym'
collect2: ld returned 1 exit status
make[2]: *** [cpsadamsx] Error 1
make[1]: *** [sundials/examples/cpodes/serial/CMakeFiles/cpsadamsx.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

显然，dlopen，dlclose，dlerror和dlsym是对libdl.so的引用。我有这个库在/lib64/libdl.so.2，但为什么它没有找到？

Apparently dlopen, dlclose, dlerror and dlsym are references to libdl.so. I have that library in /lib64/libdl.so.2, but why is it not found?

它是一个正常的'./configure;使; make install'-path我可以设置LIBS变量并发出configure命令（我想）：

Would it have been a normal './configure; make; make install'-path I could have set the LIBS variable and issued the configure command like this (I think):

export LIBS=-ldl && ./configure

但是我该怎么办呢？

UPDATE：

因此，似乎找到了（或至少一个）库，但不包含有问题的符号。也许它尝试与/ lib中的32位库？

So it seems that the (or at least a) library is found, but does not contain the symbols in question. Perhaps it tries with the 32-bit library in /lib?

有一个反汇编/lib64/libdl.so.2的方法，以确保它有参考dlopen等？

Is there a way to disassemble /lib64/libdl.so.2 to make sure it does have the references dlopen etc?

现在的问题似乎指导构建工具到正确的版本库。

The problem now seems to guide the build tools to the correct version of the library.

推荐答案

由于这个问题显示在google上，两个答案都不会指向这里的正确解决方案：

As this question is showing up on google and both answers won't point to the correct solution here it is:

CMakeLists.txt添加 $ {CMAKE_DL_LIBS} 以链接到idl。
看起来应该类似：

In your CMakeLists.txt add ${CMAKE_DL_LIBS} to link against idl. It should look similar to this:

target_link_libraries(ExpandableTest
    ${CMAKE_DL_LIBS}
    Expandable
    ExpandableTestLibrary
)

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