Undefined reference - Question about CmakeLists.txt Nlopt

Asked Feb 27 '22 at 17:55

Active Feb 27 '22 at 17:59

Viewed 19 times

Sorry to bother, I installed and included nlopt library in .cpp file (#include <nlopt.hpp>) and still gives me this errors :

In function `nlopt::opt::~opt()':
undefined reference to `nlopt_destroy'
undefined reference to `nlopt_create'
undefined reference to `nlopt_set_munge'

but I am sure that I initialized it right :

nlopt::opt opt(nlopt::LD_TNEWTON,4);

Do I have to link or add library in CmakeLists.txt. If so, how? Sorry, I am pretty new in this.Thank you in advance Kind regards

edited Feb 27 '22 at 17:59

Alan Birtles

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asked Feb 27 '22 at 17:55

aguero

yes you do have to link to libraries – Alan Birtles Feb 27 '22 at 17:59
Yes, you need to add the library to `CMakeLists.txt`. Look for `target_link_libraries`, see https://stackoverflow.com/questions/8774593/cmake-link-to-external-library. – user17732522 Feb 27 '22 at 17:59

Undefined reference - Question about CmakeLists.txt Nlopt

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