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$NetBSD: patch-ab,v 1.1 2009/06/03 06:03:50 hasso Exp $
--- configure.ac.orig 2009-06-03 05:59:44 +0300
+++ configure.ac 2009-06-03 06:03:54 +0300
@@ -333,6 +333,10 @@ AC_CHECK_FUNCS([isnan _isnan],[have_isna
AC_CHECK_FUNCS([finite _finite isfinite],[have_finite=yes])
AC_CHECK_FUNCS([copysign _copysign],[have_copysign=yes])
+if test $have_isnan = no; then
+ AC_CHECK_DECLS([isnan],[have_isnan=yes],,[#include <math.h>])
+fi
+
dnl -- when using double isnan/finite must be available
if test $ac_cv_sizeof_float -ne 8; then
test $have_isnan = no && missing_funcs="$missing_funcs isnan";
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