Clang
Clang is a compiler front end for the C, C++, Objective-C, and Objective-C++ programming languages, built as part of the LLVM project. It translates source code into LLVM intermediate representation (IR), which can then be optimized and compiled to machine code by LLVM backends. Known for its fast compilation, low memory usage, and expressive error and warning messages, it serves as a modern alternative to traditional compilers like GCC.
Developers should learn and use Clang when working on C-family languages (C, C++, Objective-C) for projects that benefit from fast compilation, detailed diagnostics, and integration with the LLVM ecosystem, such as cross-platform development, embedded systems, or performance-critical applications. It is particularly valuable in environments like macOS and iOS development (where it is the default compiler), as well as for static analysis and tooling due to its modular library-based design.