$OpenBSD: patch-src_physics_h,v 1.1 2017/06/01 11:29:12 espie Exp $

Index: src/physics.h
--- src/physics.h.orig
+++ src/physics.h
@@ -27,7 +27,6 @@
 static const float oocc = (float) 0.0000000000000000111265005605; //1/c^2
 static const float c    = (float) 299792458.0;
 static const float co10 = (float) 29979245.8;
-float copysign( float x, float y );
 
 struct Force
 {
