Need to link cmake project to dl library

Question

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? Thanks!

Answer 1

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})