To make a CMake package, you first need to create a CMakeLists.txt file in the root directory of your project. This file will define how the package is built and installed.
Within the CMakeLists.txt file, you will need to specify the project name, version number, and any required dependencies. You can also set compiler flags, source files, and any custom commands needed to build the package.
Next, create a subdirectory for each component of your package (e.g. source code, libraries, headers) and include them in the main CMakeLists.txt file using the add_subdirectory() command.
You can then define the build targets for the package using the add_executable() and add_library() commands. These targets specify the source files and dependencies needed to build the package.
Finally, you can use the install() command to specify where the built package should be installed on the system. This includes setting the installation directory, permissions, and any additional files that need to be included.
Once the CMakeLists.txt file is complete, you can run CMake to generate the build system for your package. This will create the necessary build files (e.g. makefiles, Visual Studio project files) that can be used to build and install the package on your system.
How to set the minimum required version of CMake for a package?
To set the minimum required version of CMake for a package, you can use the cmake_minimum_required command in your CMakeLists.txt file.
Here is an example of how to set the minimum required version of CMake to 3.10:
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cmake_minimum_required(VERSION 3.10)
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Place this line at the top of your CMakeLists.txt file to specify the minimum required version of CMake for building your package. This ensures that users attempting to build your package with a lower version of CMake will receive an error message indicating that their version is not supported.
What is the CMake build system?
CMake is an open-source, cross-platform build system that helps manage the compilation process of software projects. It generates makefiles or project files for different platforms and build environments, allowing developers to easily compile and build their code on various operating systems like Windows, macOS, and Linux. CMake simplifies the configuration and building of projects by providing a high-level scripting language that can define build targets, dependencies, and compiler options in a platform-independent manner. It is widely used in the software development community to automate the building process and ensure consistency across different build environments.
What is the find_package() function in CMake?
The find_package() function in CMake is used to locate and load a package configuration file provided by the package's author. It searches various locations in the system for the specified package and sets up variables and targets that can be used in the CMake project. This function is commonly used to find and include third-party libraries or tools in CMake projects.
What is a CMake target?
A CMake target is an output file or executable that is generated by a CMake project. Targets can be libraries, executables, or other types of output files that are built as part of a CMake project. Targets can have dependencies on other targets, source files, or external libraries, and CMake uses this information to ensure that the targets are built in the correct order. Targets are defined in the CMakeLists.txt file within a CMake project directory.
