CODEWITHSUNDEEP
unixcmake
Jacko
Jacko

Reputation: 13195

Need to link cmake project to dl library

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`

How can I fix this?

Upvotes: 27

Views: 26238

Answers (1)

Jacko
Jacko

Reputation: 13195

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

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})

Upvotes: 48

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