$OpenBSD: patch-gsl_math_h,v 1.1 2008/07/29 00:17:01 sthen Exp $
--- gsl_math.h.orig	Sun Jun 26 16:25:34 2005
+++ gsl_math.h	Sat Jul 26 16:45:05 2008
@@ -107,6 +107,9 @@
 
 __BEGIN_DECLS
 
+/* we don't have extended-precision yet */
+#define __isnanl(e)	(__isnan((double)e)) 
+
 /* other needlessly compulsive abstractions */
 
 #define GSL_IS_ODD(n)  ((n) & 1)
