$OpenBSD: patch-src_analysis_interpolation_qgsinterpolator_cpp,v 1.2 2010/05/23 17:50:56 espie Exp $
--- src/analysis/interpolation/qgsinterpolator.cpp.orig	Sat Nov 28 18:07:29 2009
+++ src/analysis/interpolation/qgsinterpolator.cpp	Sun May 23 19:45:34 2010
@@ -28,6 +28,11 @@
 #define isnan(f) _isnan(f)
 #endif
 
+#if __GNUC__ >= 4
+using std::isnan;
+#else
+using __gnu_cxx::isnan;
+#endif
 QgsInterpolator::QgsInterpolator( const QList<LayerData>& layerData ): mDataIsCached( false ), mLayerData( layerData )
 {
 
