Clone this repo:
  1. 36843d3 Merge pull request #2291 from digit-google/allow-duplicate-variable-expansion by Jan Niklas Hasse · 3 hours ago master
  2. 9a460a9 Merge pull request #2293 from digit-google/fix-ppoll-auto-detection by Jan Niklas Hasse · 3 weeks ago
  3. 3d1b382 CMakeLists: Fix ppoll() feature detection. by David 'Digit' Turner · 3 weeks ago
  4. 5f8a1fc Allow duplicate rule variable usage. by David 'Digit' Turner · 5 weeks ago
  5. adf9bdd Merge pull request #2281 from Hi-Angel/improve-ninja-mode by Jan Niklas Hasse · 5 weeks ago


Ninja is a small build system with a focus on speed.

See the manual or doc/manual.asciidoc included in the distribution for background and more details.

Binaries for Linux, Mac and Windows are available on GitHub. Run ./ninja -h for Ninja help.

Installation is not necessary because the only required file is the resulting ninja binary. However, to enable features like Bash completion and Emacs and Vim editing modes, some files in misc/ must be copied to appropriate locations.

If you're interested in making changes to Ninja, read first.

Building Ninja itself

You can either build Ninja via the custom generator script written in Python or via CMake. For more details see the wiki.


./ --bootstrap

This will generate the ninja binary and a file you can now use to build Ninja with itself.


cmake -Bbuild-cmake
cmake --build build-cmake

The ninja binary will now be inside the build-cmake directory (you can choose any other name you like).

To run the unit tests: