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Implement new distutils class `CCompilerOpt`, used for handling
the CPU/hardware optimization, starting from parsing the
command arguments, to managing the relationship between the CPU baseline
and dispatch-able features, also generating the required C headers
and ending with compiling the sources with proper compiler's flags.
`CCompilerOpt` mainly used as a helper class for `CCompiler`,
and doesn't provide any runtime detection for the CPU features,
instead only focuses on the compiler side, but it generates
abstract C headers that can be used later for the final
runtime dispatching process.
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