Boost.Log with CMake causing undefined reference error

Question

I am trying to use the new Boost.Log library in a project I am working on. The project is built with CMake. I am receiving link errors claiming that the linker has come acro

Answer 1

For CMake 3.15 (and some earlier versions) the following appears to be sufficient to build Boost.Log with CMake without the original linker error:

cmake_minimum_required(VERSION 3.15)
project(boost_log_tutorial)

SET(Boost_USE_STATIC_LIBS ON)           # link statically
#ADD_DEFINITIONS(-DBOOST_LOG_DYN_LINK)  # or, link dynamically

find_package(Boost 1.69.0 COMPONENTS log REQUIRED)

add_executable(boost_log_tutorial main.cpp)
target_link_libraries(boost_log_tutorial Boost::log_setup Boost::log)

The key things seem to be linking against Boost:log_setup and Boost::log, and specifying either static or dynamic linking with SET(Boost_USE_STATIC_LIBS ON) or ADD_DEFINITIONS(-DBOOST_LOG_DYN_LINK).