cmake_minimum_required(VERSION 3.12)
project(projname)
if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Debug")
endif()
set(CMAKE_CXX_STANDARD 20)
find_package(Threads)
link_libraries(Threads::Threads)
add_executable(example1 example1.cpp)
add_executable(example2 example2.cpp)
# target_link_libraries(example2 Threads::Threads)