> > A define is needed to expose the M_PI define from the 
> system headers.
> It seems like the other places where we depend on M_PI, we 
> instead have
> #ifndef M_PI
> #define M_PI 3.14159265358979323846
> #endif
> Perhaps that's a better solution?

Oh. I actually did that for my quick-n-dirty fix and thought it would be
rejected so I researched the other one :-) either one is fine by me.


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