undefined reference to `nlopt_get_errmsg'

[Griset]

Hi,

I'm getting the following linker error message :

in function nlopt::opt::get_errmsg() const': Hamiltonian.cpp:(.text._ZNK5nlopt3opt10get_errmsgEv[_ZNK5nlopt3opt10get_errmsgEv]+0x5b): undefined reference to nlopt_get_errmsg'
collect2: error: ld returned 1 exit status

when trying to compile a code which call nlopt.

I compiled the nlopt 2.7.1 using the make install command and got :

Install the project...
-- Install configuration: "Release"
-- Installing: /usr/local/lib/pkgconfig/nlopt.pc
-- Installing: /usr/local/include/nlopt.h
-- Installing: /usr/local/include/nlopt.hpp
-- Installing: /usr/local/include/nlopt.f
-- Installing: /usr/local/lib/libnlopt.so.0.11.1
-- Installing: /usr/local/lib/libnlopt.so.0
-- Set runtime path of "/usr/local/lib/libnlopt.so.0.11.1" to "/usr/local/lib"
-- Installing: /usr/local/lib/libnlopt.so
-- Installing: /usr/local/lib/cmake/nlopt/NLoptLibraryDepends.cmake
-- Installing: /usr/local/lib/cmake/nlopt/NLoptLibraryDepends-release.cmake
-- Installing: /usr/local/lib/cmake/nlopt/NLoptConfig.cmake
-- Installing: /usr/local/lib/cmake/nlopt/NLoptConfigVersion.cmake
-- Installing: /usr/local/share/man/man3/nlopt.3
-- Installing: /usr/local/share/man/man3/nlopt_minimize.3

and my cmakeList look like

cmake_minimum_required(VERSION` 3.13.4)
project(myProject)

set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})
set(CMAKE_CXX_STANDARD 20)

add_executable(myProject main.cpp)
target_link_libraries(myProject PUBLIC nlopt ${CPLEX_LIBRARIES} `${CMAKE_DL_LIBS})

I found that someone already got a similar issue but the proposed fixing does not seem to apply to my settings