CMakeList_2

hello.cpp

#include <iostream>
#include "hello.h"

int main(int argc, char** argv)
{
  if (argc < 2) {
    // report version
    std::cout << argv[0] << " Version " << HELLO_VERSION_MAJOR << "."
              << HELLO_VERSION_MINOR << std::endl;
    std::cout << "Usage: " << argv[0] << " number" << std::endl;
    return 1;
  }
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

project(helloworld VERSION 1.0)

configure_file(hello.h.in hello.h)

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED True)

add_executable(helloworld hello.cpp)

target_include_directories(helloworld PUBLIC
                           "${PROJECT_BINARY_DIR}"
                           )

hello.h.in

#define HELLO_VERSION_MAJOR @helloworld_VERSION_MAJOR@
#define HELLO_VERSION_MINOR @helloworld_VERSION_MINOR@