How do I speed up incremental builds with Clang for C++?

Incremental builds can significantly reduce the build time for C++ projects. However, to maximize the benefits of incremental builds when using Clang, you can follow several strategies:

• Use Precompiled Headers (PCH): Create precompiled headers for frequently included headers to speed up the compile time.
• Optimize Include Directives: Minimize the number of header files included in your source files. Use forward declarations where possible.
• Employ Module Support: If using C++20 or later, consider using modules instead of traditional headers to improve build times.
• Utilize Incremental Linking: When linking your code, enable incremental linking to avoid relinking unchanged code.
• Build in Parallel: Use `make -jN` to run N jobs in parallel, thereby utilizing multiple cores.
• Use Clang's Compilation Database: Set up a compilation database (`compile_commands.json`) to help Clang avoid unnecessary recompilations.

By implementing these strategies, you can significantly speed up your incremental builds with Clang for C++ projects.