The absence of a predefined method for creating build targets within the C programming language necessitates the use of external build systems. These systems, such as Make, CMake, or build2, utilize configuration files and pattern-matching rules to automate the compilation and linking processes, generating executable files or libraries from source code. For example, a build system might define rules to compile individual C source files into object files and then link those object files together to create an executable.
This approach offers considerable flexibility and control over the build process, accommodating various project structures and dependencies. Leveraging external build systems promotes maintainability and scalability, particularly for complex projects. Historically, the C language’s focus has centered on core language features, leaving the development of build tools to external solutions. This separation allows for specialization and innovation within the build system ecosystem, yielding tools tailored to different project needs and scales.