CMake is a cross-platform, open-source build system generator

To update or switch versions, run webi cmake@stable (or @v2, @beta, etc).


These are the files / directories that are created and/or modified with this install:


Cheat Sheet

CMake is a cross-platform alternative to autoconf that works on Windows, Mac, and Linux

A project structure looks like this:

├── build/
├── CMakeLists.txt
├── hello-world*
└── hello-world.cpp

And can be built my running cmake from the build directory:

pushd ./build/
cmake ../

How to create a Hello World with CMake

Lets create a hello world program in C++ and build it with CMake.

  1. Create a project directory

    mkdir ./my-project/
    pushd ./my-project/
  2. Create a Hello World C++ file named hello-world.cpp hello-world.cpp:

    #include <iostream>
    int main(int argc, char** argv) {
        std::cout << "Hello World!" << std::endl;
        return 0;
  3. Create a CMakeLists.txt to compile our code CMakeLists.txt:

    cmake_minimum_required(VERSION 3.10)
    add_executable(hello-world hello-world.cpp)
  4. Create a build directory and build the binary

    mkdir ./build/
    pushd ./build/
    cmake ../
  5. Test the built binary:



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