a1exlism/gcc_args.md

## gcc_args.md

      
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              gcc_args.md
            
          
stackoverflow
e.g.gcc -O3
and the gcc optimiser found that some of your variables were redundant in some way
that allowed them to be optimised away.

e.g.gcc -O0
Compile with optimisation disabled,
if you want to see such variables (this is generally a good idea for debug builds in any case).