Define M_PI if not defined in math.h
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@4558 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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#include "example.h"
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#include <math.h>
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#ifndef M_PI
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# define M_PI 3.14159265358979323846
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#endif
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/* Move the shape to a new location */
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void Shape::move(double dx, double dy) {
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