As part of PR numpy#13516, we added a CCompilerOpt class in numpy/distutils/ccompiler_opt.py. The class implements the compiler side of NEP0038 SIMD optimizations which

• parses the command line arguments --cpu-baseline and --cpu-dispatch
• probes the compiler to make sure the requested features can be used
• creates header files with appropriate #define macros
• caches the results for recompilation
• reports results and errors to the console.

The code as-is should be refactored to reuse more of the distuitils infrastructure where possible. In particular, the _Distutils class re-implements logging and compilation: tasks that should be delegated.