$NetBSD: patch-ae,v 1.5 2007/08/30 09:15:53 rillig Exp $

--- speech_tools/include/EST_math.h.orig	2004-04-30 18:56:49.000000000 +0200
+++ speech_tools/include/EST_math.h	2007-08-30 10:51:43.000000000 +0200
@@ -46,6 +46,7 @@
 extern "C" int isnan(double);
 #endif
 
+#include <cmath>
 #include <math.h>
 #include <limits.h>
 #include <float.h>
@@ -94,6 +95,16 @@ extern "C" {
 #define isnanf(X) isnan(X)
 #endif
 
+/* If isnan is a macro, assume it is C99 type-variadic. */
+#if defined(__DragonFly__) && defined(isnan)
+#define isnanf(X) isnan(X)
+#endif
+
+/* The g++-3.3.6 <cmath> header undefines the macro isnan, but shouldn't. */
+#if !defined(isnan) && defined(__fpmacro_unary_floating)
+#define isnan(X) __fpmacro_unary_floating(isnan, (X))
+#endif
+
 /* FreeBSD *and other 4.4 based systems require anything, isnanf is defined */
 #if defined(__FreeBSD__)