Book Image

CMake Cookbook

By : Radovan Bast, Roberto Di Remigio
Book Image

CMake Cookbook

By: Radovan Bast, Roberto Di Remigio

Overview of this book

CMake is cross-platform, open-source software for managing the build process in a portable fashion. This book features a collection of recipes and building blocks with tips and techniques for working with CMake, CTest, CPack, and CDash. CMake Cookbook includes real-world examples in the form of recipes that cover different ways to structure, configure, build, and test small- to large-scale code projects. You will learn to use CMake's command-line tools and master modern CMake practices for configuring, building, and testing binaries and libraries. With this book, you will be able to work with external libraries and structure your own projects in a modular and reusable way. You will be well-equipped to generate native build scripts for Linux, MacOS, and Windows, simplify and refactor projects using CMake, and port projects to CMake.
Table of Contents (18 chapters)

Redefining functions and macros

The code for this recipe is available at https://github.com/dev-cafe/cmake-cookbook/tree/v1.0/chapter-07/recipe-05. The recipe is valid with CMake version 3.5 (and higher) and has been tested on GNU/Linux, macOS, and Windows.

We have mentioned that module includes should not be used as function calls since modules could be (accidentally) included multiple times. In this recipe, we will program our own simple include guard, which will warn us if we try to include a module multiple times. The built-in include_guard command is available in CMake since version 3.10 and behaves like #pragma once for C/C++ header files. For this version of CMake, we will discuss and demonstrate how functions and macros can be redefined. We will show how we can check the CMake version and for versions below 3.10, we will use our custom include guard.

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