CMake Cookbook

How to do it

Step by step, this is how to write CMakeLists.txt to accomplish our task:

1. In this recipe, we will not require any language support from CMake, but we will need to locate a working Python interpreter:

cmake_minimum_required(VERSION 3.5 FATAL_ERROR)project(recipe-06 LANGUAGES NONE)find_package(PythonInterp REQUIRED)

2. We then define the test and tell CMake that we expect it to fail:

enable_testing()add_test(example ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test.py)set_tests_properties(example PROPERTIES WILL_FAIL true)

3. Finally, we verify that it is reported as a successful test, as follows:

$ mkdir -p build$ cd build$ cmake ..$ cmake --build .$ ctestTest project /home/user/cmake-recipes/chapter-04/recipe-06/example/build ...