Link Error : netengine.c:(.text+0x5f9b): undefined reference to `evthread_use_pthreads' about coturn HOT 8 OPEN

I did a test. When I build libevent by myself, /usr/local/lib/cmake/libevent/LibeventConfig.cmake is generated, which results in line 41 being judged to be true. COMMON_LIBS does not add libevent::pthreads, which will cause compilation errors.

When I use apt-get install libevent-dev to install libevent, apt-get does not install LibeventConfig.cmake for me. It will use coturn/cmake/LibeventConfig.cmake.

The key point is that lines 44-50 will be executed and used. This will add all components of libevent, core extra openssl pthreads, so it can work normally.

# src/apps/common/CMakeLists.txt

find_package(Libevent CONFIG)
if(Libevent_FOUND)
    list(APPEND COMMON_LIBS libevent::core libevent::extra libevent::openssl)
else()
    find_package(Libevent MODULE)
    if(Libevent_FOUND)
        list(APPEND COMMON_LIBS ${Libevent_LIBRARIES})
        list(APPEND COMMON_INCLUDE_DIR ${Libevent_INCLUDE_DIRS})
    else()
        message(FATAL_ERROR "Must set Libevent")
    endif()
endif()

from coturn.