cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(FindThreads_C-only C) set(CMAKE_THREAD_PREFER_PTHREAD On) find_package(Threads REQUIRED) if (NOT WIN32) add_executable(thr ${CMAKE_CURRENT_SOURCE_DIR}/../../../Modules/CheckForPthreads.c) target_link_libraries(thr Threads::Threads) endif ()