Paolo Alexis Falcone wrote:

Linux extensively uses (and relies heavily on) the optimizing extensions
that are found in GCC, although there are currently moves to use more of
ANSI/ISO C. I'm not aware of any explicit mandate though...

Can you explain what these 'optimizing extensions' are? Are these in the form of non-portable GCC-specific keywords?

And if they are, of what nature is their function?  Provide hints for compiler
optimization ala volatile? ...or something else?




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