Скачать или смотреть cmake add custom command and add custom target

Get Free GPT4.1 from https://codegive.com/8b62c9e
Okay, let's dive deep into the world of CMake custom commands and targets. This will be a comprehensive guide, covering the concepts, syntax, and practical examples to help you master these powerful features.

*Core Concepts: `add_custom_command` and `add_custom_target`*

CMake provides two essential commands for extending the build process beyond the standard compiler and linker invocations:

*`add_custom_command`:* This command defines a command that gets executed during the build process. Think of it as a way to inject arbitrary steps into the build workflow. These commands can generate source files, process data, or perform any other task your project requires. A critical feature is that `add_custom_command` can define *outputs*, which other targets and commands can depend on. This creates a dependency relationship within the build system, ensuring that the custom command is executed before anything that relies on its outputs.

*`add_custom_target`:* This command defines a target that executes a command (or multiple commands). Unlike regular targets (like executables or libraries), a custom target doesn't produce any output files directly registered to the build system's dependency graph. Instead, it's a named entry point for a set of commands. Custom targets are often used for tasks like running tests, generating documentation, or performing installation steps. They don't fit neatly into the typical compile-link cycle. Think of them as side operations to your regular build targets. Custom targets are executed only when you explicitly request them (e.g., by running `make my_custom_target` or equivalent).

*Why Use Custom Commands and Targets?*

These features become invaluable in a variety of scenarios:

*Code Generation:* Automatically generate source code from templates or other data sources (e.g., using code generators like `protoc` for Protocol Buffers).
*Data Processing:* Transform data files into a format sui ...

#python #python #python