CMakeLists.txt: Use GTest::gtest instead of gtest

This fixes the case where GTEST_ROOT is set to point to a local
GoogleTest installation (see example below).

Note that this needs a work-around for a subtle GTest 1.10.0:

- When downloading, building then installing googletest-1.10.0,
  the installation directory contains CMake files that are
  picked later by Ninja's find_package() function properly,
  and which define the GTest::gtest target.

  This is the target name that should be used by projects
  that depend on GoogleTest, per the official documentation.

- When instead 1.10.0, i.e. the same version, is downloaded
  and used locally with FetchContent_Declare() +
  FetchContent_MakeAvailable(), then only the `gtest` target
  will be defined.

  This was fixed in 1.11.0, where this use case properly
  defines GTest::gtest instead.

The work-around checks for the definition of GTest::gtest
after the FetchContent_MakeAvailable(googletest) call. If
not defined, an alias to `gtest` is created instead.

This ensures the code works with more recent GoogleTest
releases as well.
1 file changed
tree: 5bca571ae02acce68b50fc4f0fc66c384bb56301
  1. .github/
  2. doc/
  3. misc/
  4. src/
  5. windows/
  6. .clang-format
  7. .clang-tidy
  8. .editorconfig
  9. .gitignore
  10. appveyor.yml
  11. CMakeLists.txt
  12. configure.py
  13. CONTRIBUTING.md
  14. COPYING
  15. README.md
  16. RELEASING.md
README.md

Ninja

Ninja is a small build system with a focus on speed. https://ninja-build.org/

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 CONTRIBUTING.md 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.

Python

./configure.py --bootstrap

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

CMake

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:

./build-cmake/ninja_test