Constructing C++ Projects via CMake

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1. Installing CMake

2. Building Source Code Files
hello.cc
#include <iostream>
int main(void)
{
    std::cout << "Hello World!" << std::endl;
    return 0;
}
3. Building CMakeLists.txt File 
# Specify the minimum version of CMake
cmake_minimum_required(VERSION 3.10) 
 
# Project name
project(hello)  
 
# Source code files
add_executable(hello hello.cpp)
4. Building Project
In the above code, cmake_minimum_required specifies the minimum required version of CMake, while project specifies the name of the project. add_executable specifies the name of the generated executable file and the path of the source code files.

5. Running Project
Open the terminal in the project folder and enter the following command to build:
mkdir build  # Create a "build" folder
cd build  # Enter "build"
cmake ..  # Generate Makefile
make  # Compile the source code and generate the executable file
6. Building Cross-Platform Project
Below is an example of a CMakeLists.txt file that can be built on both Windows and Linux platforms.
cmake_minimum_required(VERSION 3.10)
 
project(my_project)
 
if(WIN32)
    set(CMAKE_CXX_COMPILER "MSVC")
elseif(UNIX)
    set(CMAKE_CXX_COMPILER "g++")
endif()
 
set(CMAKE_CXX_STANDARD 11)
 
add_executable(hello hello.cpp)

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