CMake + PCH example

CMakeLists.txt

cmake_minimum_required(VERSION 3.16 FATAL_ERROR)
project(test_pch LANGUAGES CXX)

add_library(test_pch STATIC
    test_pch.cpp)

target_precompile_headers(test_pch
    PRIVATE
        test_pch.h)

test_pch.cpp

#include "test_pch.h"

int main() {
    std::cout << "Hello, world!" << std::endl;
    return 0;
}

test_pch.h

#pragma once

#include <iostream>